Method of bored pile arrangement and hole opening device for it

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

 

The invention relates to the field of construction and, in particular, can be used during the installation of bored piles with extended fifth.

Known methods for devices bored piles, including drilling, development broadening mechanical expander wells, the installation of the reinforcement cage and filling the hole with concrete mix (Ganichev I.A. the Device of artificial bases and foundations. - M.: stroiizdat, 1981, p.59-61). Depending on the properties of soils, installation of bored piles can be carried out by a dry process or under clay mud. The way devices bored piles under the clay solution used in unstable and flooded soils. The diameter drilled wells perform ≥0.5 m installation of bored piles dry method is used in the construction of heavy clay soils. The diameter drilled wells perform ≥0,4 m Running for broadening the heel base perform the most common mechanical expander pantograph type, connected to the rotator drilling machines and providing the ratio of the diameters of broadening and wells equal to dy/dc≥2,5, and broadening wells razvarivat in several cycles.

Known, for example, universal Widener, comprising two coaxially arranged shaft with smeshannymi them moving and fixed couplings, to which are articulated pantograph spatial mechanism, fitted with the rock cutting elements coaxially arranged shafts are made with the possibility of mutual fixation and independent connection with drill shaft drilling rig, while the outer shaft is made with the possibility of installation on the wellhead with fixation from longitudinal movement, allowing extended cavity different configuration (Patent No. 2119036, C1, the priority date of 14.03.1995, publication date 20.09.1998, author Zaporozec A.T., EN).

The disadvantages of this method devices bored piles using a mechanical expander pantograph type are: first, the limited scope of its use due to unsuitability for small diameter wells, secondly, high complexity, due to the drilling of broadening wells in several cycles, which requires additional time makes it difficult to control the operation of the expander, the consequences of which may be jamming the extender in the hole, osypanie soil, leading to distortion of the shape and size broadening, as well as the high complexity in connection with the unloading of grantsboro manually.

In wells of small diameter is applicable mainly in the way of education of the broadening explosion when concreting of bored piles.

From the local, for example, the method of strengthening the load bearing capacity of bored piles, including the drilling of wells, installation of an explosive charge, education camouflage cavity and filled with concrete, with a well set metal cylinder having an annular recess with inclined faces, between which place an explosive charge to the direction of explosion products in the side walls of the well and create a densified annular cavity in the ground (Patent No. 2241098, C1, the priority date of 31.03.2003, date of publication, 27.11.2004, the authors Prokhorov NI, etc., EN).

The disadvantage of this method devices bored piles is limited in its application due to high cost and high risk during storage, transportation and use of explosives.

As a prototype adopted a method of devices bored piles using a mechanical expander (Kozakov YU.N., Balancin NF, Shishkanov GF, King V.A. Peculiarities of use of piles in Eastern Siberia. - Krasnoyarsk: stroiizdat, Krasnoyarsk Department, 1992, s-242, prototype)

As the prototype is accepted also known extender wells grab of the type with sliding working elements in the form of blades with profile rails hinged to traverse, and the mechanism of separation, made of EmOC is alausa rollers, mounted on the support and cooperating with specialized guides work items (Copyright certificate №589387, the priority date of 16.12.1975, publication date 25.01.1978, author King VA, prototype)

Using a grab extender on author. mon. No. 589387 connected to the rotator drilling machine, ensures the development of broadening ratio of the diameters of broadening and wells dy/dc=1,9, which is insufficient for bored piles in wells of small diameter (dc<0.4 m), so as to increase the bearing capacity of bored piles to the desired diameter ratio of broadening and wells must be dy/dc≥2. However, the mechanism of the circuit of the working bodies of the prototype does not provide more of their departure because of the design of the supports, and in addition, the extender has a lack of reliability and inconvenient in operation grundoburst.

The disadvantage of the prototype is the low efficiency of the method of bored piles in connection with the use molefractions extender wells with insufficient flying blades to perform sufficient broadening of wells with small diameters, the lack of reliability of the mechanism of spreading of the blades, as well as having inconvenient in operation grundoburst.

The objective of the invention is to increase the efficiency of the method is disorder bored piles and the improvement of the design of the extender well, used when performing a broadening in wells of small diameter, by expanding the scope broadening, increase reliability extender, ease of excavation from grantsboro and improve the quality of manufactured bored piles.

To solve the problem in the way devices bored piles, including drilling, development ening well mechanical expander, the installation of the reinforcement cage and filling the hole with concrete mix, according to the invention the development of broadening carry out grab extender, providing a ratio of diameter broadening to borehole diameter equal to dy/dc≥2, and filling the broadening of the concrete mixture produced prior to the installation of the reinforcement cage into the well.

According to the invention the development of broadening is produced when the speed of the rotator equal to 20-100 rpm.

To solve the problem extender wells containing the drive traverse hinged on her blades and interact with the movement of the blades, the blades contain radially mounted ribs, provided with curly guide edge, the cutting elements at their lower ends and the elements of the outer casing, and mechanism for moving the blades includes a carriage with the attached rollers, Samadashvili with shaped guide edge of the ribs, while the carriage is mounted on the rack for axial reciprocal movement of the bar and the carriage and rotation, and at the base of the stand has grantsboro, according to the invention is further provided with a bearing unit and gravity hook clip, hinge mounted on the traverse and interact with the mechanism carriage moving blades, a rack fixed on the carriage mechanism for moving the blades, made of I-beam with the possibility of radial rotation on a bearing unit that is installed below the cutting elements of the blades and the rollers are made with wheels and installed in pairs on both sides of the carriage with the opportunity to interact with shaped guide edges edges of the blades.

According to the invention grundoburst made with the possibility of lateral discharge, and hour of the bearing unit is fixed at the base of grantsboro.

According to the invention grundoburst can be accomplished with a folding wall, pivotally connected in the upper part of a stationary wall can be rotated in the vertical plane.

1 schematically shows the construction of the proposed extender wells, General view; figure 2 - cross section a-a in figure 1; figure 3 - extended cavity.

Claimed as part of the application extender wells contains p is evadney yoke 1 with a hinge mounted on the blades 2 and interact with the mechanism to move the blades. The blades 2 contain radially mounted ribs 3, provided with curly guide edge 4, the cutting elements 5 mounted on the lower ends of the ribs, and the outer casing 6. The movement of the blades includes a carriage 7 that is installed on I-rack 8 with the possibility of maximum deflection of the blades. To ensure axial reciprocal movement of the carriage 7 and the head plate 1, and rotation on the carriage 7 in pairs on each side mounted rollers 9, provided with flanges 10, interacting with shaped guide edge 4 of the ribs. I-hour 8 mounted on a bearing unit 11, located below the cutting elements 5 blades. The extender wells equipped with grantsboro 12 hour podshipnikovoj node is fixed in the base 13 grantsboro 12. The latter is made with a folding wall 14, pivotally connected in the upper part of a stationary wall of grantsboro can be rotated in the vertical plane. The extender wells is supplied by gravity hook clip 15, pivotally mounted on traverse 1 and cooperating with the carriage 7 of the mechanism for moving the blades to lock their circuit and connection beam and carriage upon completion of the broadening.

The inventive method devices bored piles include: borehole drilling dcy=(0,7-0,8) m; concreting of the widened heel piles; the installation of the reinforcing cage, and concreting of the pile shaft.

Sinking wells produce drilling machine with auger drilling rod on the bottom. Then to the drilling rod is connected declare extender, which is a production tool to the drilling machine performing one cycle education broadening cutting and compaction of the walls and base broadening. The extender is lowered into the well in spaced along the axis of the condition. After lowering the extender into the borehole include rotator and with a speed of n=20 to 100 revolutions per minute, depending on soil conditions make development broadening. To control the depth of penetration on the mast of the drilling machine set rail with a markup equal to the stroke of the bar corresponding to the height of the broadening. When passing a distance of 0.8 h, where h is the height of the broadening, stop axial drilling rod and at this level 3-5 revolutions produce the Erasure of base broadening and complete lling of grantsboro and the cavity between the blades of the expander. Then include axial and produce sinking up to full height ening and closing of the blades of the expander when the connection of the carriage traverse. The dilator is then removed from the wells, which connects the carriage from the head plate and unloaded from the drilled soil by disclosure of the blades and the rotation of the hinged cover of grantsboro. Next, carry out concreting of the widened heel wells, install reinforcement cage and complete arrangement of bored pile concreting its trunk.

The advantage of the proposed method devices bored piles and used for its implementation extender wells is to increase the efficiency of the method by improving the design of the extender well by expanding the scope of broadening in wells of small diameter, due to the form of the rack I-beam, increasing the reliability of the extender due to the additional installation of a bearing Assembly and more rational arrangement of the rollers on the carriage mechanism for moving the blades facilitate excavation of grantsboro, as well as by improving the quality of manufactured bored piles.

1. The way devices bored piles, including drilling, development ening well mechanical gripper expander, the installation of the reinforcement cage and filling the hole with concrete mix, characterized in that the developing broadening ratio of the diameter of the broadening to borehole diameter equal to dy/dc≥2, when the speed of the rotator, is equal to n=20 to 100 revolutions per minute, depending on soil conditions, while passing distance of 0.8 h, where h is you the PTA ening, stop axial drilling rod and at this level 3-5 revolutions produce the Erasure of base broadening and complete lling of grantsboro and the cavity between the blades of the expander, then include axial and produce sinking up to full height ening and closing of the blades of the expander, then the dilator is then removed from the wells, then carry out concreting of the widened heel wells, install reinforcement cage and complete arrangement of bored pile concreting its trunk.

2. The extender wells containing the drive traverse hinged on her blades and interact with the movement of the blades, the blades contain radially mounted ribs, provided with curly guide edge, the cutting elements at their lower ends and the elements of the outer casing, and mechanism for moving the blades includes a carriage, with the attached rollers interacting with shaped guide edge of the ribs, while the carriage is mounted on the rack for axial reciprocal movement of the bar and the carriage and rotation, and at the base of the stand has grantsboro, characterized in that the expander is further provided with a bearing unit and hook clip, swivel installed on the traverse and interact with karetka the mechanism of movement of the blades, hour fixed on a carriage mechanism for moving the blades, made of I-beam with the possibility of radial rotation on a bearing unit that is installed below the cutting elements of the blades and the rollers are made with wheels and installed in pairs on both sides of the carriage with the opportunity to interact with shaped guide edges edges of the blades.

3. The extender well according to claim 2, characterized in that grundoburst made with the possibility of lateral discharge, and hour of the bearing unit is fixed at the base of grantsboro.

4. The extender well according to claim 3, characterized in that grundoburst made with a folding wall, pivotally connected in the upper part of a stationary wall can be rotated in the vertical plane.



 

Same patents:

FIELD: construction industry.

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

34 cl, 26 dwg

FIELD: construction.

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

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FIELD: building.

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2 dwg

FIELD: construction, particularly bored piles with enlarged footing or enlargements at the bottom of the pile.

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36 cl, 25 dwg

Bearing pile // 2251609

FIELD: building, particularly for constructing foundations of various building structures.

SUBSTANCE: bearing pile comprises head, rod and tip fixed to embedded rod part by embedded member. The tip is formed of thermoplastic concrete and has electric heater located inside the tip. Electric heater heats the tip after driving thereof into ground as far as it will go to obtain softening temperature of 80-150°C. Then the pile is fully driven in ground. Electric heater wires are placed in tube in longitudinal rod direction and brought outside under pile head for connection thereof with electric power source.

EFFECT: increased load-bearing pile capacity due to provision of widened pile tip support area.

2 cl, 5 dwg

The invention relates to the construction of pile foundations of bored piles in silty-clay soils
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The invention relates to the field of construction, in particular to a method of construction in soil printed designs

Bearing pile // 2251609

FIELD: building, particularly for constructing foundations of various building structures.

SUBSTANCE: bearing pile comprises head, rod and tip fixed to embedded rod part by embedded member. The tip is formed of thermoplastic concrete and has electric heater located inside the tip. Electric heater heats the tip after driving thereof into ground as far as it will go to obtain softening temperature of 80-150°C. Then the pile is fully driven in ground. Electric heater wires are placed in tube in longitudinal rod direction and brought outside under pile head for connection thereof with electric power source.

EFFECT: increased load-bearing pile capacity due to provision of widened pile tip support area.

2 cl, 5 dwg

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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.

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FIELD: construction industry.

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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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