Method for arrangement of pile foundations for structures, pile foundations and shell structure for creation of widened foot

FIELD: construction.

SUBSTANCE: invention is related to methods for arrangement of pile foundations for structures, to pile foundations and shell structure for creation of widened foot for pile foundations. Method for creation of pile foundation for structures, according to which the following stages are executed on site to arrange the mentioned foundation - well for installation of foundation pipe is drilled with the help of the first auger drill. The following section is drilled under lower end of installed foundation pipe. Cavity is arranged in the specified section by means of scraper and pressure of water jet. Loose soil is removed from specified cavity by mentioned first drill. Pipe for set of tools and accessories with the second auger drill and flexible shell that envelopes the lower part of the second specified drill is lowered through foundation pipe into lower part of specified section. Excess pressure is built up in specified shell, and moulding material is injected into specified cavity, surplus of which is then removed by the second auger drill. After mentioned material hardens, the specified shell is blown off and removed via specified foundation pipe. Reinforcing device is lowered into foundation pipe. Concrete material is poured into foundation pipe, at that specified cavity is filled, and specified reinforcing device is embedded into concrete, thus creating widened foot for foundation pipe. Versions of method and pile foundation are also stated.

EFFECT: higher stability and resistance to compressing and stretching forces, lower material intensity.

5 cl, 26 dwg

 

The scope of the invention

The present invention relates to a method of creating odnowionego Foundation for structures and method of creating mnogosloinogo Foundation.

The present invention relates to odnowienia and mnogosloinogo foundations and shell to create a widened soles of these foundations.

The level of technology

In the construction of large structures such as buildings, walls, towers and the like, is used as a rule, foundations, supported by several of the Foundation piles. Piles are placed in the soil, serve as a support base and perceive compressive and tensile forces caused by wind load and self-weight of the structure.

For absorbing compressive forces are usually use smooth Foundation piling, who hammered into the ground until it stops in the solid rock. Thus, when using this method, in some cases, you have to hammer into the ground many meters of piles before her bottom will reach solid ground. Therefore, this method of laying the Foundation can be very expensive.

When creating foundations in areas where the soil analysis shows that the distance to hard rock is great, they use a different type of Foundation piles, on the lower end of which has a sole of a diameter greater than the diameter of the piles. In the case of pressure, exerted on the pile, is distributed over a larger area, and the sole makes a draught of piles in the ground under the pressure of its own weight design

Since the driving of piles with wider soles in the ground is impossible, as well as its insertion in a pre-drilled hole, have proposed various solutions for the installation of the specified pile in the desired position before performing the actual anchor reinforcing element.

So, in the Japan patent A2-01017924 described an example implementation in which broadened the bottom of the pile Foundation is equipped with an inflatable membrane, which placed the pile, and is connected to the shell, which are located in a cavity and filled with a hardening liquid composition.

Patent Sweden SE-C2-515997 reveals the way in which the inflatable envelope is placed at the lower end of the well to perform in the cavity of the concrete Foundation piles, and then fill the shell with concrete, thus creating increased support for the specified concrete piles.

U.S. patent 4661021 describes the increasing body for constructs such as piles or anchors that are placed in the ground. The body design allows you to enter it into the well in a compressed form, and after installation on the desired location to increase.

The disadvantage of the use of such inflatable elements as widened soles is their inability to use the Oia again; in addition, they do not have internal reinforcing elements.

Tasks inventions

Thus, the present invention is a method of creating a pile foundations of a new type, through a simple process directly at the job site. Foundations should have a higher stability and resistance to compressive and tension caused by wind load and self-weight of the structure.

Another aim of the invention is a method of creating a pile foundations, reusable specified shell, which will reduce construction costs.

These tasks are solved by a method, according to which the well Foundation pipe Buryats using the first screw auger, the base pipe is installed in the specified hole, drilling the next section under the lower end of the installed base of the pipe, in this section perform the cavity by means of a scraper and pressure water jet, loose soil is removed from the cavity a first screw holes, through the said Foundation 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 and inside the specified cavity pump injection molding material, the excess material is removed by the specified second screw holes. After solidification of this material the shell specified in the blow off and remove through the specified base pipe, the base pipe is lowered reinforcing device, poured concrete material, while the cavity is filled, and said reinforcing device lay in the concrete, while providing a wider sole Foundation for the specified pipe.

These problems are also solved another way, according to which the well pipe under the Foundation of the Buryat first screw holes, in the specified well establish the Foundation pipe, drilling the next section under the lower end of the installed base of the pipe, in this section perform the cavity by means of a scraper and pressure water jet, loose soil is removed from the cavity a first screw holes, through the said Foundation 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 in said shell creates excessive pressure inside the specified cavity pump injection molding material, the excess which then remove the second screw holes. After the solidification of the material the shell specified in the sweep is removed through the said Foundation pipe. Next, in the upper part of this cavity drill a number of wells, each of which can accommodate an extra Foundation pile, with several reinforcing units inside the specified cavity. The Foundation pipe insert reinforcing device, poured concrete material, whereupon the said cavity is filled with concrete, as specified reinforcing device lay in the concrete, while providing a wider sole Foundation for the specified pipe.

Another object of the present invention is to provide a construction of pile Foundation, which has very high resistance to compression and tension caused by wind load and self-weight of the structure.

This problem is solved by odnowionego Foundation in which this 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.

This problem is solved by mnogosloinogo Foundation, in which the specified extended outsole has an outer layer of molded material and the inner concrete core, which has some reinforcing devices, and what each of these devices is associated with the specified structure via several connecting means, passing inside the first base pipe or specified additional Foundation tubes.

Another object of the invention is the creation of a shell capable of forming a widened soles for these foundations. This goal is achieved by the fact that this shell has on its outer surface multiple injection holes.

The invention

The following describes the pile foundations for the installation of wind turbines, containing the supporting elements, reinforced by several reinforcing devices, as well as the modalities for the establishment of foundations. However, as pile foundations, and how to create them can be used for other types of tower structures, such as pipes, high flagpoles, power racks, and antennas. In addition, they can be used for laying of foundations for buildings, bridges, offshore platforms, etc.

The way creatures of pile foundations under these facilities directly at the place of work contains the following steps:

1) using the first screw auger drill hole, which set the Foundation pipe,

2) Buryats next section under the lower end of the installed base pipe,

3) in that section performs the cavity by means of a scraper and pressure water jet,

4) loose soil removed from okutannosti specified first screw holes,

5) through the specified 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,

6) in the specified shell creates excessive pressure inside the specified cavity pump injection molding material, the excess which then remove the second screw holes,

7) after the solidification of this material the shell specified in the blow off and removed through the said Foundation pipe,

8) in the base pipe lower reinforcing device

9) in the base pipe poured concrete material, while the cavity is filled, and said reinforcing device lay in the concrete, while providing a wider sole to the base pipe.

In addition, the drilling of the hole under the pile may be made other drilling devices, such as mobile giant.

In one embodiment, the auger drill is performed with the angle of elevation of the screw, thumb extended, but less complete, resulting in a loose formation material will always be routed to the inside of the screw and removed by rotation of the drill.

Foundation pile is round pipe, through which may pass through the pipe with a set of tools and lighting the deposits, flexible shell molding material, blocks, valves, connecting means and the concrete.

To facilitate the formation of widened soles on the bottom end installed base pipe you need to drill the second well in the area under the lower end of the installed base pipe. To create a cavity in the specified pipe is lowered folded scraper, which deploy in the area under the lower end of the installed pipe and cause it to rotate. In the surrounding rock is loosened and the resulting cavity will have a circular cross-section.

To remove the loosened rock Foundation pipe and under her hole filled with water and subjected to the action of pressure. As a result, the rotation of the scraper facilitate and loose soil, forming a clay-like paste, remove from the cavity to the first screw holes.

The first screw auger is lowered into the base pipe after removal from it of a scraper and remove them with clay-like paste.

The form given cavity is determined by the shape of the scraper and shape of the inflatable shell. Immediately after fitting the pipe with tools and devices specified shell is filled with air under a pressure of 1-5 bar, causing it swells and forms a cavity.

The shell extension leads to redistribution specified on the spine of the clay paste, which will be pushed down to the second screw borax and subsequently deleted.

The dimensions specified cavity will be determined by the size and shape of the inflatable shell. To inflate the specified shell you can use air or water. This makes it possible to provide the desired shape and dimensions specified cavity, adjusting the amount of air or water supplied to the shell.

For the formation of widened soles, to avoid the danger of collapse of the specified cavity and deformation of the sole in the process of hardening of concrete is necessary to form the outer layer, keeping the shape of the cavity in the process of hardening of concrete. For this purpose the outer surface of the specified shell equipped with multiple injection channels through which can be pumped molding material inside the specified cavity.

In another embodiment, the injection of this material is produced at the same time, when the specified shell is exposed to pulsating pressure. Due to this, the material is pressed into the surrounding soil cavity, evenly distributed on it and compacted, making the outer layer of the cavity sufficiently strong to prevent collapse of soil during curing widened soles.

While specified shell is exposed to the pulsating pressure pump and injection mater is al, the surrounding soil will be compressed, causing the outer layer turns into a dense shell. In addition, some of the surrounding soil will be displaced, with regard to which the pipe with tools and devices provided with a second screw holes, remove excess soil and/or molding material.

Alternatively, the compaction of the surrounding soil by acting on the shell specified in the pulsating pressure can be used sound waves, i.e. the acoustic emitter. Thus, the soil will be compacted, and simultaneously molding material can be pumped into the surrounding soil specified cavity.

The shell is made from an elastic material, so that it can be compressed when moving her around a base pipe and removed from it after the curing of the molding material.

For reinforcement widened soles of the Foundation pipe lower reinforcing device. The specified 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 a preferred embodiment of the invention the reinforcing device is a device, disclosed in the application WO-AI-03062539, according to which a reinforcing us what the device is equipped with a folding element to move inside the specified cavity of a number of branches, thanks to widen the sole is reinforced almost uniformly throughout its volume.

In another example implementation of the claimed invention the amplifying branch formed by a network of rods and/or wires. This enables the production of light and inexpensive reinforcing elements, which are located not in one plane, and on several levels widened soles.

For the perception of the tensile forces occurring in a Foundation pile according to the invention it is important that this pile was associated with its reinforcing device, which between them provide one connecting element or more.

As the molding material injected or pressovannogo in the soil surrounding the specified cavity for forming the outer layer, widened soles, can be used in cement, cement gel, concrete, liquid mortar, slurry, or hardened polymeric material.

To facilitate removal of the flexible sheath with the specified outer layer to its outer surface covered with oil, for example, crude oil, which prevents the adhesion to it of molded material.

To create mnogosloinogo Foundation for these structures directly on the work site, the method comprises the following steps:

1) using the first screw Boo is and drill hole, in which establish the Foundation pipe,

2) Buryats next section under the lower end of the installed base pipe,

3) in that section performs the cavity by means of a scraper and pressure water jet,

4) loose soil removed from this cavity a first screw holes,

5) through the specified 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,

6) in the specified shell creates excessive pressure inside the specified cavity pump injection molding material, the excess which then remove the second screw holes,

7) after the solidification of the material the shell specified in the blow off and removed through the said Foundation pipe,

8) in the upper part of this cavity drill several wells, each of which can accommodate an extra Foundation pile, with several reinforcing units inside the specified cavity

9) in the base pipe insert reinforcing device

10) in the base pipe poured concrete material, the cavity is filled with concrete, these reinforcing device lay in the concrete, resulting in creating a broadened p is dosvy to the Foundation piles.

The only difference in the ways of creating odnowionego and mnogosloinogo foundations are specified steps 7)to (10), on which the outer layer of the specified cavity perform several wells to one widened sole, it was possible to establish some Foundation piles. This results in improved stability and stiffness of pile foundations due to the fact that the forces acting on them, will be distributed on several Foundation piles, and the amount of soil over each widened sole will increase.

It should be noted that it is also possible to provide the Foundation for the building, which includes a number otnoshenij or mnogosloinykh foundations or a combination of both. Otnoshenii Foundation contains widened sole, with the outer layer of the molding material and the concrete core, which laid the reinforcing device is in turn connected via several connecting elements with the specified structure. Due to this tensile force can be transmitted pile Foundation and distributed in it.

Mnogosloinyi Foundation contains widened sole, with the outer layer of the molding material and the concrete core, which contains a certain quantity of reinforcing devices, each specified reinforcing device is associated with the criminal code of the related structure via several connecting means, passing through the first mentioned base pipe or the subsequent Foundation of the pipe, allowing the tensile and compressive efforts can be transmitted pile Foundation and distributed in it.

Theoretically, the application mnogosloinogo Foundation with several Foundation piles connected with wider sole provides a very stable base for construction. Indeed, if from this facility, for example, under the action of the wind on one Foundation pile Foundation construction will impact the compressive force, at the same time on the opposite Foundation pile is equal to the tensile stress. The result of these efforts will balance each other and the net force on the base is very small.

The specified flexible sheath is made of stretch material to provide the possibility of inflation and deflation. In addition, on its outer surface have several channels through which can be injection molded material into the surrounding soil when the shell is in the pressurized state. These channels can be performed directly in the body of the shell or in the form of external elements, mounted, for example, by adhesive. For example, the hose leading to the specified channels in the shell, can is delivered to it through a drop pipe for tools and devices.

Unlike the Central reinforcing device in the form of a block with the unfolding elements and lateral reinforcing device with rods passing inside the specified cavity, the side reinforcing device may be a set of wires passing down through one of the Foundation pipe and out the top through the other. Thus, it is possible to create a wire mesh in the specified cavity and under the first base pipe. To deploy the specified mesh, reinforcing device in the first base pipe can provide end part, able to cling to these wires and hold them in place, or the other end part, is able to push the wire down during the formation of widened soles.

Alternatively, the flexible membrane for the formation of the mentioned cavity is possible to use a sleeve, for example, from a polymeric material, similar to the sleeves used in the systems of wastewater and sewage, and specified the sleeve can have multiple layers, for example, of plastic and fiberglass, and it required a form to be provided by heating. It is also possible to use for this purpose the sleeve in combination, for example, with internal elastic membrane to create specified in the cavity of the casing. It is also possible to use for this W the purpose specified sleeve or network in combination with the injection of molding material into the surrounding soil so that that specified the sleeve is filled with the specified material and will serve as an item of gain, helping to preserve the specified form of the outer layer when the material hardens, this translates into a hard shell on the periphery of the specified cavity.

Brief description of drawings

The invention is disclosed below with reference to the accompanying drawings, on which:

Figa-1h illustrate a method of creating odnowionego Foundation

Figa-2j illustrate a method of creating mnogosloinogo Foundation

Figure 3 illustrates the way of pouring molding material odnowionego Foundation

Figure 4 illustrates the way of pouring molding material mnogosloinogo Foundation

Figure 5 depicts a combined basis with odnowionym and mnogosloinymi foundations,

6 depicts mnogosloinyi Foundation

7 depicts a wind turbine installed on a number of otnoshenij foundations,

Figa-8C depict mnogosloinyi Foundation, which as reinforcing elements used wire.

Detailed description of the invention

On Figa - 1h demonstrates how to create odnowionego Foundation 1, in which the well 2 under the Foundation pipe 3 Buryats first screw holes 4, in the specified hole 2 establish a Foundation pipe 3, Buryats next section 5 under the lower oncom 6 installed base pipe 3, moreover, in section 5 performs the cavity 7 through the scraper 8 and water under pressure, loose soil from the cavity 7 remove screw holes 4 in the lower part 10 section 5 omit the pipe 9 for tools and devices, in which is placed a screw auger 11 with elastic shell 12 covering the lower end 13 of the drill 11, the specified shell 12 are inflated and the wall 15 of the cavity 7 is injected molding material 14, after which the remains of a specified material removed by the drill 11 through the pipe 9, and after hardening of the material 14 and the shell 12 blow off and removed through the base pipe 3, in the pipe 3 is inserted a reinforcing device 16, through the pipe 3 poured concrete material 17, fill the cavity 7 and the reinforcing device 16 lay in the concrete material 17, thus forming a widened sole Foundation for the pipe 3.

On Figa-2j shows how to create mnogosloinogo Foundation 20 in which the well 2 under the Foundation pile 3 Buryats first screw holes 4, in the specified hole 2 establish a Foundation pipe 3, Buryats next section 5 under the lower end 6 of the installed base pipe 3, in section 5 performs the cavity 7 through the scraper 8 and water under pressure, loose soil from the cavity 7 remove screw holes 4 in the lower part 10 section 5 omit the pipe 9 for tools and devices, in which is placed a screw auger 11 selectional sheath 12, covering the lower end 13 of the drill 11, in the upper part 22 of the cavity 7 drill a few holes 21, each of which may be introduced an additional base pipe 24, with several reinforcing device 23 within the specified cavity 7 through the base pipe 3 lower reinforcing device 16, the base tube 3, 24 pour concrete material, resulting in the cavity 7 is filled, the valve blocks 16, 23 lay drenched in concrete 17, providing the specified base pipes 3, 24 broadened the sole 25.

Figure 3 illustrates the way of pouring molding material odnowionego Foundation 1, according to which the reinforcing device 16 is placed in the lower part of the base tube 3 and the cavity 7. The cavity 7 is pre-filled layer 30. Concrete 17 is poured through the base pipe 3. Reinforcing device 16 connected with a number of connecting means 31, passing through the base pipe 3.

Figure 4 illustrates the way of pouring molding material mnogosloinogo Foundation 20, whereby the reinforcing device 16, 23 are located in the lower part of the Foundation of the tubes 3, 24 and the cavity 7. The cavity 7 is pre-filled layer 40. Concrete 17 is poured into the base pipe 3. Reinforcing device 16, 23 connect with some connect the positive means 41, passing through the base pipe 3, 24.

Figure 5 shows a combined base 50 with odnowionym 1 and mnogosloinym 2 foundations, with built structure (not shown) is connected to the upper part of the Foundation of the tubes 3, 24.

Figure 6 shows mnogosloinyi Foundation 2 with five Foundation tubes 3, 24. According to one embodiments of the invention five Foundation tubes 3, 24 can be connected with the farm of the reinforcing material, making mnogosloinyi Foundation 2 can be used as a base for offshore structures.

Figure 7 shows the wind turbine 70, mounted on a number of otnoshenij foundations 1 and reinforcing device 16 is connected with the second tier of the tower of the wind turbine 70 by pulling the connecting means through the base pipe and through the first level of the tower of the wind turbine 70.

The connection of the Foundation to the second tier provides the following benefits:

- the calculated moment of force acting on the tower structure, is significantly reduced due to the fact that the attachment point of the tower moves up one level;

in the flanged connection between the Foundation and the tower is not required to transfer large effort, and it can be smaller in size;

- dimensions of the tower itself can be reduced due to the fact that bestvina frequency towers is reduced in the calculation of the tower as part of the Foundation;

- flange connection between the first and second tiers are placed within its structure that facilitates attachment to the tower of connecting elements. Furthermore, the reduced amount of maintenance flanged connections.

On Figa-8C shows the cavity 7, in the outer layer 80 which is executed a number of holes for Foundation piles 82, 83, 84. Wire 81 skipped down through the Foundation pile 82 and up through the Foundation pile 84, while stretching 85 skipped down through the Foundation pile 83. Stretching 85 pulls the wire 81 so that it moves inside the cavity 7. Concrete material 86 during curing grips with the wire 81 and stretching 85, forming in the process broadened the sole 87.

1. The way to create a pile foundations for structures, according to which the place of work perform the following steps to create the specified Foundation:

1) using the first screw auger drill hole, which set the Foundation pipe, 2) the Buryat next section under the lower end of the installed base pipe, 3) in that section performs the cavity by means of a scraper and pressure water jet, 4) loose soil removed from this cavity a first screw holes, 5) through the base pipe in the lower part of the said plot down the pipe for a set of instruments is impressive and fixtures, hosts the second screw auger and a flexible membrane covering the lower part of the said second screw auger, 6) in this shell creates excessive pressure inside the specified cavity pump injection molding material, the excess which then remove the second screw holes, 7) after the solidification of this material the shell specified in the blow off and removed through the said Foundation pipe, 8) in the base pipe lower reinforcing device, 9) 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.

2. The way to create a pile foundations for structures, according to which at the mounting site perform the following steps for establishing the Foundation: 1) using the first screw auger drill hole, which set the Foundation pipe, 2) the Buryat next section under the lower end of the installed base pipe, 3) in that section performs the cavity by means of a scraper and pressure water jet, 4) loose soil removed from this cavity a first screw holes, 5) through the specified base pipe in the lower part of the said plot down the pipe for a set of tools and devices, in which R is smashin second screw auger and a flexible sheath, covering the lower part of the said second screw auger, 6) in this shell creates excessive pressure inside the specified cavity pump injection molding material, the excess which then remove the second screw holes, 7) after the solidification of the material the shell specified in the blow off and removed through the said Foundation pipe, 8) in the upper part of this cavity drill several wells, each of which can accommodate an extra base pipe, with several reinforcing units inside the specified cavity, 9) in the base pipe insert reinforcing device 10) in the base pipe poured concrete material, resulting in this cavity is filled, after which the specified reinforcing device lay in the concrete, creating a wider sole for Foundation piles.

3. Pile Foundation according to the method according to claim 1, characterized in that the widened sole includes an outer layer of molded material and the concrete core, which laid the reinforcing device, and a reinforcing device connected to the specified design through several connecting means.

4. Pile Foundation according to the method according to claim 2, characterized in that the widened sole includes an outer layer of molded material and concrete CE is davino, in which incorporated several reinforcing devices each of which is connected to a given design through several connecting means passing through the first base pipe or the subsequent Foundation of the pipe.

5. Shell to create a widened soles of these foundations the method according to claim 1 or 2, characterized in that the shell on its outer surface has a number of injection holes.



 

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5 cl, 26 dwg

FIELD: construction industry.

SUBSTANCE: invention refers to construction industry and namely to construction of bearing piles in ground rock. Device for making multi-layer sealed pile in ground rock includes, in the combination, elongated hollow tube having longitudinal axis, upper inlet end for material, open lower discharge end for material and diametre of the first external surface and common formed lower head element at open discharge end, which has diametre of the second external surface, which is more than diametre of the first external surface and made with the possibility of transmitting combination from axial and transverse stress components when hollow tube is lowered. Head element consists of common attachment to hollow tube; at that, head element includes lower driving end which in general has configuration of flattened cone between head element of external surface and lower discharge hole made in the lower driving end, and back end having in general the configuration of flattened cone, and cap of the head element covering lower discharge hole. Lower head element with the cap and hollow tube are formed for being introduced into ground rock and for displacing the earth when hollow tube with lower head element and the above cap is lowered into ground rock so that a cavity is formed in ground rock. The cap is at least partially removed from lower discharge hole when hollow tube is then lifted from the formed cavity in order to perform passage of material through lower discharge hole to the cavity section released with hollow tube and lower head element. The latter has the form of cross section and the sizes which are more than the shape of cross section and sizes of hollow tube in order to decrease friction forces on hollow tube when penetrating into ground rock and being removed from it.

EFFECT: improving reliability of the pile and capacity and production effectiveness of piles.

34 cl, 26 dwg

FIELD: oil-and-gas.

SUBSTANCE: invention related to construction, particularly can be used for bored piles with enlarged base arrangement. The method includes hole boring, hole opening with mechanical clampshell enlarger, reinforced cage installation and filling in the hole with concrete mixture. Developing enlargement with ration of enlargement diametre to hole diametre, equal de/dh≥2 with rotation velocity equal n=20-100 revolution per minute, dependant on ground conditions. After covering distance 0.8 h, where h - height of enlargement, stop axial supply of boring media and at that level, during 3-5 revolutions execute enlargement base cleaning, and ground collector and voids between enlarger blades complete filling. Turn on axial supply and execute boring till enlargement total height and enlargement blades closure. Take away enlarger, then concrete enlarged base, install reinforced cage and complete bored piles arrangement with concreting its core.

EFFECT: method of bored pile arrangement efficiency increase and hole enlarger design improvement, hole enlarger reliability increase, easing of ground withdrawal out form ground collector and better quality of constructed bore pile.

4 cl, 3 dwg

Driven pile // 2386748

FIELD: construction.

SUBSTANCE: invention is related to construction, in particular to pile foundations. Driven pile consists of shaft with axial hole, sharpened tip with circular base and conusoidal shell with spike, cavities inside shell filled with hardening solution. There is a threaded hole in tip base, which is closed with threaded plug with stem. Tip shell is rumpled with submergence force after removal of threaded plug and additional submersion of pile. For additional increase of bearing capacity there is an elastic shell on lower part of shaft with facilities for fixation of its upper and lower ends; cavity between elastic shell and shaft surface; protective jacket with facilities of its fixation of shaft, which slides in radial direction and embraces elastic shell. There is a radial hole in shaft, which connects longitudinal hole with specified cavity transformed into support belt after the pile has been submerged at the specified depth, the cavity has been filled with hardening solution via holes in shaft and the solution has hardened.

EFFECT: improved bearing capacity of hollow piles.

4 cl, 7 dwg

FIELD: construction.

SUBSTANCE: method of drilled pile manufacturing includes well arrangement in soil. Supply of material into it. Compaction of soil under lower end of formed pile. In process of soil compaction, in the base of formed drilled pile with parametres equivalent to driven pile, its conventional camouflet cavity is arranged with diametre Dkp equal to diametre of dzs equivalent to driven pile, where: dzs - diametre (m) of equivalent driven pile. DkP - diametre (m) of conventional camouflet cavity produced in soil as it is displaced under lower end of formed drilled pile, by means of supply of controlled material volume to fill conventional camouflet cavity according to the following dependence : where V is controlled volume (m3) of material spent for filling of conventional camouflet cavity produced in soil due to its displacement into pile foundation. As well is filled with material in the form of hardening mix, preferably plastic concrete mix, diametre of equivalent driven pile is identified according to dependence , where dzs - diametre (m) of equivalent driven pile. Dskw - diametre (m) of well; Δh - measured value of subsidence (m) of plastic concrete mix in well as conventional camouflet cavity produced due to displacement of soil under lower end of formed pile is being filled. And in order to produce drilled pile with parametres of driven one of the same diametre, soil is treated in the lower end of pile till material subsides, preferably concrete mix, in well by value, which is compared with the one defined from the following ratio: Δh/Dskw=0.4. Besides in the lower end of well soil is exposed to forces, and their sufficiency is controlled (assessed) by flow of material additionally supplied to well in process of soil treatment, and its volume is identified according to formula , where Dskw - diametre (m) of formed pile. Besides in well reinforced with casing pipe, dynamic actions at soil are carried out until material subsidence value in casing pipe makes at least the following: , where Δhtr is subsidence (m) of material in casing pipe. Dskw - diametre (m) of well. Dfr - inner diametre (m) of casing pipe. Dynamic actions at soil in lower end of formed pile are carried out to achieve conventional failure, which is represented by material subsidence of not more than 2 mm in process of the last action, and when soils are compacted by electric explosions in pile foundation with application of electrode system, dynamic treatment is interrupted provided that electrode system freely installed on bottomhole in process of electric explosion sinks by not more than 1-2 cm, and in process of soil dynamic treatment at least one additional camouflet expansion is created along pile length, preferably, in zones of well opening of soils that are most pliant to compaction, which is detected by reaction of soil to test dynamic actions performed along pile length.

EFFECT: development of drilled piles with bearing capacity by soil, same as for driven piles, with minimum possible usage of resources and maximum possible usage of properties inherent in massif of soil that contains pile.

7 cl

FIELD: construction.

SUBSTANCE: device for compaction of soil in drilled pile well bottomhole includes casing pipe, bushing fixed on it with working element pulled through it. Working element is arranged in the form of hollow pipe, at the lower end of which there is a thrust journal and sealing attachment, and at the upper end there are upper and lower supports and inertial mass, placed on hollow pipe between upper and lower supports with sliding fit.

EFFECT: improved bearing capacity of drilled piles erected in watered and soft soils.

4 dwg

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