Pipe concrete pile with reinforced base and method of its erection
SUBSTANCE: pipe concrete pile with a reinforced base comprises an outer metal shell in the form of a pipe with a reinforcement frame made of longitudinal reinforcement rods arranged along the shell contour, filled with concrete. The outer metal pipe shell is made as non-extracted. The pipe-concrete pile additionally comprises a reinforcing element formed from an inner pile, made of a cylindrical part and a driven tip in the form of a truncated cone, and an expansion element formed from a concrete structure of cylindrical shape, divided into segments with the possibility of their displacement in radial direction with a rotation around the horizontal axis, and combined in a mounting position with an inner pile. The inner diameter in the upper part of the expansion element is more than the inner diameter in the lower part.
EFFECT: reduced material intensity and labour intensiveness, higher manufacturability and reliability of design.
4 cl, 2 dwg
The invention relates to the field of construction, namely, the construction of piles, and can be used during the construction of pile foundations during the construction of buildings and structures, and above all bridge piers constructed on soft soils, primarily on soils of river or sea areas.
Known pile-shell intermediate supports of the bridge bulkhead (options)containing the metal shell in the form of a pipe, filled with concrete reinforcing cage made of longitudinal reinforcement bars located on the contour of the shell and the spiral reinforcement, wrapped around them, and to eliminate capillary rise of water optionally containing a waterproof screen in the area of soil freezing of waterproofing material system "Penetron", performed by injection into the cavity of the pile shell through holes in a metal shell, which is then muted (patent RF GR №78223, IPC E01D 19/04).
However, in this arrangement, pile creates a hinge in the most intense section of the pile, in the zone of maximum bending moments, which does not contribute to its stability and strength. In addition, disrupted the continuity of the pile, which is unacceptable.
Known pile-shell intermediate supports of the bridge Stoyanova type comprising a metal shell in the form of a pipe, filling the ing concrete with reinforcing cage, made of longitudinal reinforcement bars located on the contour of the shell and spiral reinforcement, wrapped around them, and to reduce static pressure crystallized water on the walls of the metal shell from the inside additionally contains the ropes of porous material located within the reinforcing cage and attached to longitudinal reinforcement bars along each rod, and the Central tube of elastic material filled with a porous material. With this Central pipe reinforced with metal wire filled with foam and is made of rubberized nylon, (patent RF GR №63367, IPC E01D 19/14).
However, in this construction, the pile is assumed capillary leak water to the valve, which may result in active corrosion of rebar. In addition, also disrupted the continuity of the pile, which is unacceptable.
Also known kind of Foundation piles, on the lower end of which has a sole, ashiraya the base of the piles.
For example, known CFA pile with the broadening of the discharge in a weak water-saturated soils, the upper vertical portion of which is reinforced concrete element with the reinforcement cage, reinforced by rings attached to the inner side of the frame. The lower extended part formed inside the flexible sheath, comprising the her of garland seamless shells, made of latex (natural or synthetic) rubbers. (Melnikov B.N., Bogomolov, VA "Guidelines for calculation, design and construction of Foundation piles discharge (including widening)", Sverdlovsk, 1983).
The disadvantage of this design of piles is an uncontrolled form of broadening piles, as well as the limitations of small diameter piles. In General, this design is limited scope in terms of the geological structure of the soil.
Also known injection pile, (patent of the Russian Federation on FROM No. 2238366, IPC E02D 5/34, 5/44, 7/46) which is shaped in the form of a vertical rod with wavy side surface and includes a perforated injector pipe with flanges fixed along its entire length and a conical tip, the base of which is larger than the diameter inyectoras pipe and equal to the diameter of the flange. Injectory pipe is left in the body arranged piles, is a bearing element and simultaneously performs the role of reinforcement. This pile is also without removing the soil. For this purpose, the walls of the borehole is cut into longitudinal grooves, the indentation tip, cutting grooves and dive inyectoras pipes are produced simultaneously, while providing a gap between the wall formed by the well and inyectoras pipe having perforations along the entire length, and produce injecti the Finance hardening of the material.
However, the design of the piles and the way of its construction does not allow to reinforce the pile for the perception of bending moments.
Also known construction of pile foundations and shell to create a widened soles, in which the sole has an outer layer of molded material and the inner concrete core, which laid the reinforcing device, and the specified reinforcing device is associated with the specified structure via several connecting means. The reinforcing device may be a block with a number of protruding elements, which can be included in the concrete and thus to gain a foothold in it that will help increase strength widened soles. In another example implementation of the claimed invention the amplifying branch formed by a network of rods and/or wires. When this shell is capable of forming a widened soles, has on its outer surface multiple injection holes (patent of the Russian Federation on FROM No. 2346112 IPC E02D 5/44).
The disadvantage of this design of piles is an uncontrolled form of broadening the base of the piles, and the limited scope under the terms of the geological structure of the soil. In addition, the combination of external injection molded shell and concrete core will lead to capillary suction by the contact of the surfaces and corrosion of concrete.
Known pile, made of jointly buried in the ground of the inner and outer tubes having open ends, with the extraction of one of the pipes made solid wall, characterized in that the extract is made the inner pipe and the outer pipe perforated with the implementation of the holes in the seat tube, weakened mechanical or corrosion defects, and used as a carrier for the valve. During the construction of piles simultaneously immerse the outer and inner tube. Through the inner tube serves hardening material located rammed by compaction. After the formation of the broadening of the hardening material under the lower edge of the outer pipe internal solid wall pipe is lifted, opening holes in the outer perforated pipe. The tamping again produce the seal hardening material with the hardening material penetrates through the holes, forming a broadening on the lateral surface of the pile and filling the inner cavity of the outer tube. Sequentially repeating the loop seal with the rise of the inner tube until it is completely removed, carry out the formation of the pile shaft from hardening material, in which the outer tube becomes a bearing armature. (patent OF No. 2186905).
However, in this construction the outer casing is not included in the cross-section of the pile, i.e. the pile Bureau the traveler, not trubobetonnykh. And this pile may not be installed in flooded soils, the water area. Consequently impossible laying concrete trebovaniyam in the presence of water in the cavity (and the water will be required).
These analogues designs piles have the following characteristics in common with the claimed solution: the presence of the outer metal pipe; concrete element with the reinforcement cage, the execution of piles by widening at the bottom.
In contrast to the process, in the inventive design of piles in the quality of the material used trubble, metal pipe wrapper included in the piles, and the extended part of the pile is made in the form, for example, four concrete ring segments discharged into the pipe in the installation position, and then drop down and form a widened heel with the sealing effect of the Foundation soil under the impact load. However, nonremovable metal jacket pipe diameter in a wide range (depending on the transmitted load on her, from 800 mm 2020 mm) together with the concrete core is included in the pile bending and compression (pulling) load. In addition, fill the cavity of the pile is drained and filled with heavy concrete dry with vibration, and not by way VAC and not by injection.
There is a method of driving the tube-like the palms into the ground and conclusion it in concrete, which contains the stage in which the pile Shoe attached to the lower end of the pipe pile to be driving into the ground to create a tubular piles, hammer pipe pile into the ground by means of the pulsed power; fill the inner space of the pipe pile a mass of concrete, hammer piling pipe deeper into the ground using pulsed power, so that the concrete mass passes through the through hole around the pile pipe and up into the cavity formed in the soil pile Shoe; add the specified concrete mass in the inner space of the pipe pile and hammer tubular pile further into the ground by means of the pulsed power alternately with the addition of the concrete mass in the inner space of the pipe pile. (patent of the Russian Federation on FROM No. 2236505).
However, this method does not provide sufficient resistance to bending, so as to armirovat the periphery of the cross section is not possible. In addition, this method cannot increase the load bearing capacity of piles by creating a wider heel and strengthen the soil at the base.
There is a method of creating a pile foundations for structures, according to which the place of work perform the following steps to create the specified Foundation: using the first screw auger drill hole, which set the Foundation pipe, Buryats SL is blowing the area under the lower end of the installed base pipe, in this plot fulfill the cavity by means of a scraper and pressure water jet, loose soil is removed from the specified cavity a first screw holes through the base pipe in the lower part of the said plot down the pipe for a set of tools and devices, hosts the second screw auger and a flexible membrane covering the lower part of the said second screw auger, the specified shell create excessive pressure inside the specified cavity pump injection molding material, the excess which then remove the second screw holes, after hardening of this material the shell specified in the blow off and remove through the specified base pipe, the base pipe is lowered reinforcing device in the base pipe poured concrete material, while the cavity is filled, and said reinforcing device lay in the concrete, creating a wider sole to the base pipe (patent of the Russian Federation on FROM No. 2346112).
However, this method may be used only for piles with small diameter (600-700 mm). In addition, the pile in this way does not perceive bending moments, as deprived on the contour of the valve.
A known method of manufacture in soil printed reinforced piles, including education in the soil reinforced casing pipe of the well, filled the E. its hardening composition, introduction reinforcement and sealing composition and utrambovyvaya it into the ground, removing the casing, wherein the seal hardening composition and utrambovyvaya it in the ground produced by introducing into it after removing the casing by driving the valve in the form of a tube with a closed bottom end. Removing the casing may be made after full boot-curing composition on the entire length of the well. Then filled in the hardening composition of the borehole is administered by driving the valve in the form of a pipe with supports with a diameter less than the diameter of the well. The introduction pipe filled with the hardening composition of the well is produced, for example, the influence of shock loads from the punch mounted on the upper end of the pipe. Under the action of the shock tube is immersed in the hole, compacting and utrambovyvaya ground wall-curing composition (patent of the Russian Federation on FROM No. 2181410).
However, this method is not ensured high load-bearing capacity of the piles due to the inability to form a widening soles, but also because of the material, pile, not rubberoom.
In these analogues of the method of construction of the piles has the following characteristics in common with the claimed solution: education in the soil well; strengthening her; introduction valve; the introduction of a concrete composition; concrete compaction the soil.
In contrast to the known analogues in the inventive solution instead of extractable casing - enter nonremovable metal casing pipe to be included in the work of the entire design of the piles, and becoming part of the total composite cross section, consisting of a reinforced concrete core, reinforced UN-tensioned reinforcement encased in a steel yoke pipe coating. In addition, make positioning coordinates, excavation together with the immersion of the steel shell, perform the lowering of restorative element in the bottom of the drilled wells and immersion firming element in the base of the well. The introduction of the reinforcement cage is accomplished by pumping water from the borehole bottom. Concreting perform well with vibroplates concrete pump with surface water area.
The objective of the proposed technical solution is the creation of trubobetonnykh piles with reinforced base and improving its production technology.
The task provides technical result consists in increasing the bearing capacity trubobetonnykh piles, the strength of the concrete core, the hardening soil Foundation, provided the drainage cavity wells. In addition, the inventive method provides the possibility of monitoring the carrying capacity of the piles.
The issue is the implementation of piles with reinforced base is provided by incorporating into the design of piles firming element in the form of internal piles and element ening, made in the form of annular segments; reducing the metal due to the formation of trubobetonnykh design - non-removable metal shell and concrete core, to increase the strength, water resistance and adhesion to metal pipes, increasing the carrying capacity as material piles and the soil.
Drainage cavity wells is achieved by pumping water and dynamic compaction of soil under the pile's bottom. Monitoring of the bearing capacity of the pile is provided by driving internal piles. In the known analogues, determination of bearing capacity of the pile is more expensive methods, for example, static test piles.
The use of the proposed technical solution reduces the number of piles in the Foundation of a building, material costs and time for manufacturing operations for the production of piles in the Foundation.
The essence of the technical solutions is that in trubobetonnykh the pile with reinforced base, containing the outer metal shell in the form of a pipe reinforcing cage made of longitudinal reinforcement bars located on the contour of the shell, filled with concrete, according to the claimed solution, the outer metal jacket pipe made nonremovable; trubobetonnykh pile additionally soda is separated reinforcing element, formed from inner piles, consisting of a cylindrical part and the locking lug in the form of a truncated cone, and item-ening formed of reinforced concrete cylindrical shape, is divided into segments, with the possibility of moving in the radial direction with the rotation around the horizontal axis, and the joint in the installation position with the inner pile; the inner diameter in the upper part of the element broadening larger than the inner diameter at the bottom.
When this element broadening in the installation position of the joint with the inner pile with temporary wire ties. Trubobetonnykh pile further comprises a recoverable inventory bar, made with cap at the lower end and mounted on the upper part of the inner piles.
In the method of construction of trubobetonnykh piles with reinforced base, including formation of holes; strengthening; introduction valve; the introduction of a concrete composition; compacting concrete in the ground; according to the invention strengthening wells carried out by immersing the external nonremovable tube-shell shock or vibration method; as immersion nonremovable tube-shell carry out the removal of soil; then by resetting lower reinforcing element formed using concrete qi is andrijeski form, divided into segments, with the possibility of moving in the radial direction with the rotation around the horizontal axis and the joint in the installation position with the inner pile; inner pile hammer with the inventory bar, made with cap, until the movement of the segments in the radial direction and rotation around the horizontal axis, then capture the inner pile with cap and remove the bar; after the introduction of the reinforcement cage produce pumping water; concreting piles carry out dry, the concrete pump.
The inventive device is illustrated by drawings, where Fig 1A) - presents a view of the pile when lowering firming element in the bottom of the drilled wells; Figb) - when immersed firming element in the base of the borehole; Figv) - when lowering the reinforcement cage and pumping water from the borehole bottom; Figg) - when concreting well pumps from the surface; figure 2 is a view of the piles with the details of the item broadening the base. Positions on the drawings indicated:
1 - nonremovable tube-shell;
2 is a plot of the water surface in the pond,
3 - allowany the ground,
4 - internal pile,
5 - ring segments
6 - inventory bar (podbaba),
7 - hydraulic hammer,
8 - rods of the reinforcement cage,
9 - betonbet of the concrete pump
10 - b is a ton mixture,
11 - cap inventory bar,
12 - driven handpiece internal piles 4.
Trubobetonnykh pile contains: nonremovable the casing pipe 1 with reinforcing cage 8, filled with concrete and reinforcing element located in the bottom of the metal pipe casing 1 and consisting of inner piles 4 and item broadening representing the concrete structure has a cylindrical shape, is divided, for example, four segments 5 can be moved in the radial direction with the rotation around the horizontal axis passing through the contact segment; and recoverable inventory bar.
Nonremovable metal - steel - tube-shell 1 is made with a diameter in a wide range from 800 mm 2020 mm depending on the transmitted load on her. Nonremovable tube-shell included in the pile bending and compression (pulling) load.
Internal pile 4 can be made of steel pipes with a diameter from 0.3 to 0.8 m and a length of from 2.5 to 4.0 m depending on diameter of the outer nonremovable tube shell 1, and filled with concrete. Internal pile comprises a cylindrical part and a driven lug 12, made in the shape of a truncated cone, and with the item broadening forms a reinforcing element piles.
Item ening formed using concrete design the products of cylindrical shape, separated, for example, into four equal circular segment 5, the inner side of which has a smaller thickness at the top and thicker at the bottom part. Thus, in the installation position (when the four segments are in the folded position) inner diameter in the upper part of the element broadening larger than the inner diameter at the bottom, causing the inner surface of the wall element broadening forms a truncated cone. The outside diameter of the element broadening can be up to 1.8 m and a height of up to 2.5 m due to this design element broadening is arranged to move the four segments from the center in the radial direction, with rotation around horizontal axis when subjected to a shock force. Segments 5 item broadening in the installation position attached with wire ties to knock the tip 12 internal piles 4, which in the installation position is placed in the inner cavity of the element ening formed by the inner surface of the four segments 5.
After driving internal 4 piles in the ground, knock the tip 12 extends beyond the lower boundary element broadening, the cylindrical part of the inner piles are included in the internal cavity of the element broadening, resulting segments element broadening moved from the center in the radial direction with p the collar around the horizontal axis. That is, when hitting the ground ring segments 5 are opened and form a widened heel.
As a result of internal pile segments 4 and 5 of item broadening increase the footprint, additionally reinforce the soil at the base, create broadening that provides the perception of primer design loads.
Under the action of the shock load is the seal of the Foundation soil.
Inventory 6 bar represents a metal structure of a circular cross-section with cap 11 at the lower end, which, after extraction of the inventory bar is left on the upper part of the internal piles 4 for extra sealing and fixation to avoid going beyond the metal pipe coating 1 in the slaughtering process in the soil. In the upper part of the inventory bar 6 posted by hammer 7.
The method of construction of trubobetonnykh piles with reinforced base contains the following steps:
Through shock or vibration method through the water column into the soil or ground surface is immersed nonremovable the casing pipe 1 to the desired depth. As immersion nonremovable metal pipe shell 1, with webnographer carry out the removal of soil. When reaching the nonremovable tube-shell 1 of the project marks choose the ground to the bottom of a Foundation pile or below, if the neo is compulsory for broadening the base of the piles.
After excavation of the cavity of the casing in the borehole bottom discharge lower reinforcing element including an internal pile 4, consisting of a cylindrical part and the locking lug 12, and the element broadening representing the concrete structure has a cylindrical shape, is divided into segments (e.g., four) 5, in Assembly (i.e., folded) position. Then on the upper part of the inner piles 4 establish inventory 6 bar. With the help of a hammer 7 with the weight of his drum parts 4 to 7 tons of produce clogging internal piles 4. At the moment of impact on the ground and dives internal piles segments element broadening moved from the center in the radial direction with the rotation around the horizontal axis passing through the contact segment. After removing inventory barbell cap 11 is left on the upper part of the internal piles 4 for extra sealing and fixation on the bottom of the nonremovable tube-shell 1 to prevent outside metal pipe shell 1 in the slaughtering process in the soil. After removing the inventory bar reinforcement cage is lowered, produce pumping water, and concrete piles. Supply of concrete, in contrast to the known analogues produce dry, the concrete pump.
When driving (immersion) due to the taper of the inner pile 4 moves to Lavie segments 5 from the center in the radial direction, rotated around a horizontal axis passing through the contact ring segment.
The claimed design trubobetonnykh piles with reinforced base, thanks to the introduction of internal piles in conjunction with item broadening in the form of ring segments, can significantly reduce the consumption of materials, the complexity of the production piles, as well as to improve maintainability and to guarantee the quality of construction.
In addition, in the moment of immersion of internal piles at the base of the wells have the opportunity of monitoring the carrying capacity of the pile in the soil, due to the probing effect subepoch strikes carried out by using the inventory bar and hammer.
Trubobetonnykh pile with reinforced base constructed as follows. By positioning coordinates, immerse nonremovable metal casing pipe with simultaneous extraction of the soil. Then discharge firming element, consisting of internal piles with 4 knock-tip and elements broadening, made in the form of four reinforced concrete ring segments 5, in the bottom of the drilled hole. In the time of reset in the Assembly (i.e., folded) position and the joint temporary wire connection to inner pile 4, the annular segments 5 when hitting the ground and disclosed under alongside the predetermined impact load form the widened heel with the seal of the Foundation soil. Then on the upper part of the inner piles 4 lower hydraulic hammer with inventory 6 bar made in the form of metal constructions tubular section with cap piles at the lower end. Produce clogging of internal piles. The next step is the immersion of the reinforcement cage, made in the form of metal rods, and pumping water from the borehole bottom. After that make concreting well pumps with surface waters or ground by means of concrete vibration.
The use of the proposed technical solution allows sealing of the cavity well with subsequent draining and pumping out water. As a result, the filling of the well with concrete can be done dry, using a concrete pump.
1. Trubobetonnykh pile with reinforced base, containing the outer metal shell in the form of a pipe reinforcing cage made of longitudinal reinforcement bars located on the contour of the shell, filled with concrete, characterized in that the outer metal jacket pipe made nonremovable; trubobetonnykh pile further comprises a reinforcing element formed from inner piles, consisting of a cylindrical part and the locking lug in the form of a truncated cone, and item-ening formed of reinforced concrete cylindrical is shape, divided into segments, with the possibility of moving in the radial direction with the rotation around the horizontal axis, and the joint in the installation position with the inner pile; the inner diameter in the upper part of the element broadening larger than the inner diameter at the bottom.
2. Trubobetonnykh pile with reinforced base according to claim 1, characterized in that the element broadening in the installation position of the joint with the inner pile with temporary wire ties.
3. Trubobetonnykh pile with reinforced base according to claim 1, characterized in that it further contains recoverable inventory bar, made with cap at the lower end and mounted on the upper part of the inner piles.
4. The method of construction of trubobetonnykh piles with reinforced base, including formation of holes; strengthening; introduction valve; the introduction of a concrete composition; concrete compaction in the soil; characterized in that the strengthening of wells carried out by immersing the external nonremovable tube-shell shock or vibration method; as immersion nonremovable tube-shell carry out the removal of soil; then by resetting lower reinforcing element formed using concrete cylindrical shape, is divided into segments with the possibility of their moving in RA the territorial direction with rotation around horizontal axis and the joint in the installation position with the inner pile; internal pile hammer with the inventory bar, made with cap, until the movement of the segments in the radial direction and rotation around the horizontal axis, then capture the inner pile with cap and remove the bar; after the introduction of the reinforcement cage produce pumping water; concreting piles carry out dry, the concrete pump.
SUBSTANCE: device for formation of wells for augered piles includes an expander, casing pipes and an impact device. The expander has a cylindrical-conical form with the diameter of the cylindrical part larger than the diameter of casing pipes, inside the cylindrical part there is the left thread for the lower casing pipe, and the conical part is equipped with stiff ribs.
EFFECT: reduced side friction during driving submersion of inventory casing pipes and their withdrawal in process of augered piles body concreting, elimination of soil and soil waters inside casing pipes in process of their submersion.
SUBSTANCE: reinforced sand pile for foundations on waterlogged clayey bases includes placement of a cylindrical sand pile in the base soil. Along the outer contour the pile is reinforced with a geosynthetic material, operating for stretching and constricting transverse deformations of sand soil.
EFFECT: higher bearing capacity of a sand pile, reduced subsidence of foundations on waterlogged clayey soils, reduced material intensity.
SUBSTANCE: method to produce wells in soil for erection of filling piles includes simultaneous submersion of a stamp and a casing pipe by hammering to a design elevation, withdrawal of the stamp and the casing pipe, previously a set of a working element is submerged into soil, including a casing pipe with a head, a stamp with a body arranged coaxially to the casing pipe, with a striker and a tip, at the same time the stamp with the body, the striker and the tip is used as a rammer protruding from the casing pipe.
EFFECT: higher extent of soil compaction and bearing capacity of foundations on filling piles in unstable, loose and waterlogged soils.
2 cl, 5 dwg
SUBSTANCE: method to manufacture cast-in-place piles consists in suspension of a casing pile to a pile driver, its resting against soil, filling the lower part of the casing pipe with a loose material and its compaction with a falling hammer of the pile driver to form a plug in the casing pipe, afterwards the casing pipe is submerged to the specified elevation by hitting the plug with the hammer, and then by dropping of the hammer from high altitude, the plug is knocked out with simultaneous formation of bottom broadening under the casing pipe, installation of a reinforcement frame and concreting of a pile shaft with simultaneous withdrawal of the casing pipe. After the casing pipe achieves the design elevation, the plug is pushed out with the help of higher strikes of the hammer until it starts moving, at the same time with every hit, while pushing the plug, the casing pipe is withdrawn to the height from 2 to 3 cm, and after pushing the plug to the depth equal to the half of the casing pipe diameter, withdrawal of the casing pipe is stopped, and it is again driven into soil with at least 20 hits of the hammer. The plug is pushed out leaving its safe remainder, at the same time the plug material forms an integral part of the pile foundation. The additional amount of loose material is added to the casing pipe, which is rammed using the hammer with simultaneous withdrawal of the casing pipe, thus forming a broader pile foot. Prior to installation of the reinforcement frame, the casing pipe is set into the finished pile foot, and the plug remainder is fully pushed out. The reinforcement frame is installed into the casing pipe with its forced deepening into strong bearing soil, and the entire pile body is concreted by means of continuous laying of cast concrete with simultaneous raising of the casing pipe.
EFFECT: higher rates of pile body concreting, increased bearing capacity of a cast-in-place pile due to reinforcement of weak soils, reduction of material intensity and labour intensiveness.
15 cl, 5 dwg
SUBSTANCE: plant for soil compaction comprises a hollow casing pipe and a narrowing cap, which includes tabs hingedly fixed on the hollow casing pipe. The narrowing cap is equipped with at least one tab rigidly fixed on the hollow casing pipe.
EFFECT: higher strength of a cap and its tabs, provision of compaction of soil having stronger interlayers.
7 cl, 3 dwg
SUBSTANCE: aseismic pile comprises a cylindrical fabricated structure made of reinforced concrete placed into a sand concrete hollow reinforced cylinder, on the bottom of which there is granite sand, with a layer of around one metre. The space between the reinforced cylindrical structure and the sand concrete reinforced cylinder is filled with sand for the height of the hollow cylinder.
EFFECT: invention provides for foundation reliability, reinforcement, preventing building damage in case of considerable earth oscillations under seismically dangerous conditions, lower material intensity.
SUBSTANCE: invention relates to the field of construction and may be used to erect piled foundations in weak and heaving soilds. Application of the device is especially efficient to erect cast-in-place piles for light wooden, frame buildings, transmitting small loads to foundations and exposed to deformations from seasonal freezing of heaving soils. The device comprises a casing pipe, a core arranged in the form of a pipe, closed with plates at the upper and lower sides, besides, chains are attached to the lower plate. Chains are placed into a tight shell made of waste materials (plastic, cardboard, veneer, etc.). In the upper and lower plates there are holes, through which a reinforcement rod stretches, which also passes via a shell with chains. In the lower part of the shell the reinforcement rod is fixed with an orifice, and in the upper part - with a nut. Between the casing pipe and the well wall there is an anti-heaving material (bitumen mastic, organosilicon compounds, polymer films, sarking, sand and gravel mix).
EFFECT: device makes it possible to increase the bearing capacity of a pile and prevents exposure of building and structure foundations to soil heaving forces.
SUBSTANCE: shell pipe is made of hollow metal or reinforced concrete cylinders joined by means of electric welding or bolt joints. In order to increase bearing capacity and improve process capabilities, there is a diaphragm installed into inner cavity of pile, providing for formation of compacted zone of soil under spike, controlling depth of its submersion and specified bearing capacity. Diaphragm is made in the form of truncated cone oriented towards pile head and with hole in its upper part.
EFFECT: increased bearing capacity, reduction in material consumption and labour costs.
SUBSTANCE: invention is related to the field of construction, in particular to pile design. Reinforced concrete driven pile of circular section contains sharpened bottom end having shape of rotation paraboloid truncated in focal plane, lower to truncation plane, paraboloid changes into spherical belt, at the very end spherical belt transits into cone. Formula provides the second version of reinforced concrete driven pile making.
EFFECT: improved shape of pile tip, with the purpose of more complete usage of impact or vibration energy and reduction of time needed for pile submersion in ground.
2 cl, 1 dwg
SUBSTANCE: invention is related to the field of construction, in particular, to technical facilities for erection of pile foundation erected from bored piles. Lost cap for erection of bored pile in the form of cone-shaped body is made of two parts, upper part of which represents truncated cone, and lower part is formed by bearing rod fixed in cantilever manner from the side of lower base along its symmetry axis with rippers in the form of radially installed plates.
EFFECT: reduction of head resistance and easier intrusion of guide tube in earth.
3 cl, 2 dwg
FIELD: building structures, particularly shallow foundations.
SUBSTANCE: method involves creating well by ground excavation, introducing preparatory portion of hardening material in well hollow including calculated part of hardening material; arranging explosive charge in lower well part; securing explosive charge; blowing explosive charge up to create cavity for widened foundation post part; crushing and widening above calculated part after explosion; introducing additional portion of hardening concrete in well up to 4/5 of well height; filling it with calculated part of above material portion. Concrete for casting is used as preparatory hardening material.
EFFECT: reduced time, increased simplicity of foundation building and reliability.
2 cl, 5 dwg
FIELD: building and construction.
SUBSTANCE: method includes serial vibration immersion of inventory elements into soil, which are mated between each other, and their following vibration extraction with concurrent filling of hollow in soil with concrete mixture. Inventory elements are used, which are made in form of profiled posts, having gates in lower portion, closed during immersion in soil and opened by flexible links during extraction of elements from soil and feeding of concrete mixture. At the same time profiled elements of longitudinal walling have lesser length, than length of profiled elements of vertical posts, which during immersion are pressed in for greater depth than profiled elements of longitudinal walling. First, profiled element of longitudinal walling is immersed, and then via guiding conductor profiled element of vertical post is densely mated to it and is than immersed. Concrete mixture is loaded in profiled element of longitudinal walling with its extraction with open gates and extracted element is immersed in next position adjacently to previous profiled element of vertical post being in soil. Concrete mixture is loaded into profiled element of vertical post during its extraction with open gates and extracted element if immersed into following position with concurrent mating to previous profiled element of longitudinal walling with use of guiding conductor. Then inventory elements are immersed again. Device for construction of bearing-limiting structures in soil includes crane or pile driver with vertical guide, vibration immersion driver and at least two inventory hollow elements. Inventory elements are made in form of profiled elements of longitudinal walling and profiled elements of vertical posts. Profiled elements of longitudinal walling have length less than length of profiled elements of vertical posts, which are made of hollow rectangular profiles, rigidly interconnected by solid rib along transverse axis along whole height of element, while vertical guide in lower portion is provided with guiding conductor.
EFFECT: higher efficiency, broader functional capabilities.
2 cl, 13 dwg
FIELD: building, particularly cast-in-place building units, namely support structures.
SUBSTANCE: reinforced concrete column is formed in retained formwork and consists of upper support part and lower foundation part. Column includes reinforcement frame grouted with concrete mix and embedded members arranged in upper column part. Upper part of frame is located in retained formwork. Embedded members are in level with foundation slab marks and with flooring panel marks. Embedded members are formed as closed contours with stiffening ribs. Column is built in single- or multi-slot hollow. Projection of geometric retained formwork cross-section center coincides with that of lower reinforcement frame part. Arms of lower reinforcement form part extending in Y-axis direction are sized in accordance with given mathematical relation. Method of column erection involves forming single- or multi-slot hollow; producing reinforcement form with embedded members; forming retained formwork; installing above components; vertically placing the reinforcement frame in hollow so that frame is spaced a distance from hollow bottom; vertically adjusting and fixing upper column part to prevent transversal displacement thereof; grouting lower column part in bottom-top direction; grouting inner retained formwork area of upper column part. Hollow has dimensions measured in Y-axis direction determined from given relation.
EFFECT: possibility of simultaneous building erection in upward and downward directions relative ground level.
7 cl, 13 dwg
FIELD: building, particularly for erecting support structures, namely pile foundations, injection anchors, walls in ground, cast-in-place reinforced earth constructions and other geotechnic structures used for new building erection or reconstruction of existent buildings.
SUBSTANCE: method involves forming well or trench section in ground; at least partly filling thereof with hardening material or drilling agent, for instance with cement-bentonite one; substituting thereof with hardening material; immersing reinforcing cage with outer flexible shell connected to at least part of cage length in well. The flexible shell is permeable for liquid fraction of the hardening material and provides waterproofing of the cage after setting of above material and hardening material located outside the shell. Shell parameters are determined from the given correlations.
EFFECT: increased load-bearing capacity, reliability and service life, extended field of application.
24 cl, 9 dwg
FIELD: building, particularly foundation building, namely for erecting pile foundations in seasonally freezing ground.
SUBSTANCE: method involves forming well extending for the full thickness of seasonally freezing ground layer, wherein well diameter increases pile diameter; installing heater in the well; transferring heat; driving casing pipe with detachable tip in ground through heater cavity; concreting well bore along with simultaneous lifting casing pipe and removing heater. Heat is supplied to concrete mixture within the limits of seasonally freezing ground after casing pipe removal. Inductor made as copper wire coil covered with heat-protective layer and located outside metal pipe is used as the heater. Heating is performed within 10-12 hours along with maintaining 75-80°C temperature of concrete mix by regulating inductor power up to obtaining concrete strength equal to 80% of design strength. After inductor removal from the well gap formed between well wall and pile body is filled with non-heaving ground.
EFFECT: reduced power inputs along with maintaining high productivity and increased load-bearing pile capacity.
2 cl, 3 dwg
FIELD: building, particularly pile foundation erection.
SUBSTANCE: method involves drilling hole; installing injection pipe in the hole bottom center; installing reinforcement case; injecting cement-and-sand grout through the injection pipe below lower pile end for ground compaction and widened part arrangement; concreting the pile. To create widened part of the pile and to compact ground after concrete hardening cement-and-sand grout is fed under pressure into sealed bag formed of elastic water impermeable material and connected to lower end of ejection pipe so that cement-and-sand grout expands the bag up to reaching necessary bag volume.
EFFECT: increased economy of pile forming, increased ability of clay ground compaction at pile base.
4 dwg, 1 ex
FIELD: foundation building.
SUBSTANCE: pile has body made as shell filled with concrete and formed as members having trough-shaped cross-sections and extending in longitudinal direction. Members have side walls abutting the central wall and extending at obtuse angles from it. The shell has frame. Central walls of frame members are of ellipsoid shape and filled with concrete.
EFFECT: increased load-bearing capacity and reliability.
FIELD: building, particularly to erect cast-in-place pile having large diameter in collapsible ground layer of large thickness.
SUBSTANCE: method involves drilling pilot hole; installing casing pipe connected to puncher; punching the well ground by dropping load on the puncher through casing pipe to reach design point and enlarging the casing pipe; arranging reinforcement case in the pipe; filling the well with concrete mix as casing pipe moves upward; compacting the concrete mix. In the case of pile with 300-1500 mm diameter forming and in the case of collapsible ground layer thickness up to 18 m or 18-50 m ratio between pilot hole depth and collapsible ground thickness is 1:(4.5-6) and 1:(1.5-5). The puncher has reinforced concrete tip and head made of tube with outer diameter equal to inner diameter of pilot hole. Welded to the head are centering rings. The tip has ring to engage thereof with technological control rod provided with thread, washer with retainers and nut on opposite end thereof. Ratio of height H of upper head part provided with centering rings to length of casing pipe to be installed in the head is 1:(20-30). Ratio between outer puncher diameter D and outer diameter d at tapered part ℓ thereof is equal to 1:0.8. Length ratio between cylindrical head part L and cylindrical tapered part ℓ is equal to 1:0.6. Angles γ of head and head transition area leading to tapered part ℓ are equal to 30°. Difference between outer puncher diameter D to outer casing pipe T diameter is 90-100 mm.
EFFECT: reduced labor inputs and decreased material consumption.
FIELD: building, particularly to create bored piles in cased wells during building and building structure foundation erection.
SUBSTANCE: method involves heating ground surrounding place of pile erection and heating concrete mix with induction heater. The concrete mix is vibratory treated in pulsed mode at the beginning of heating operation by applying electromagnetic field generated by induction heater to metal reinforcement bars, wherein high-frequency current of induction heater is subjected to low-frequency modulation. At concrete mix setting beginning the pulsed mode is changed into high-voltage one. Device for above method realization comprises induction heater comprising steel pipe put on asbestos-cement pile casing pipe and winding made of copper coiled bus linked with high-frequency power source. The winding is connected to metal pipe. Diametrical longitudinal orifices are made in the steel pipe. The power source comprises circuit providing high-frequency current modulation with low frequency.
EFFECT: possibility of simultaneous heat and vibration application to concrete mix, reduced cost of the device along with reduced number of working tools, simplified control, provision of concrete shrinkage and compaction under heating, which is performed by single device.
2 cl, 4 dwg
FIELD: building, particularly foundation and retaining wall erection with the use of injection piles.
SUBSTANCE: injection pile comprises concrete shaft formed directly in well and comprising reinforcing cage made as metal injection pipe lowered in well to refusal and spaced from well wall. The injection pipe is provided with lower perforated section having side injection orifices arranged in several layers beginning from lower injection pipe end. Well diameter is not more than 3d, where d is outer injection pipe diameter. Perforated section length is more than 3d, but less than L and is equal to (0.2-0.7)L, where L is well depth. Retaining wall is built on pile foundation comprising injection piles. The retaining wall includes reinforcing cage made as metal pipe having upper part used as head. The retaining wall is composed of concrete blocks laid in several rows one upon another. Blocks of lower row form retaining wall base. At least upper block installed on lower one has through orifice, which is vertically aligned with mounting orifice formed in lower block. Common cavity defined by above orifices is reinforced and concreted.
EFFECT: simplified structure, reduced cost of pile foundation and retaining wall construction.
21 cl, 3 ex, 3 dwg