RU2575660C2 - Method of rock production of bored piles and devices for its realisation by v.s.skalnyj - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: method to manufacture bored piles consists in preliminary drilling of a well to specified depth, fixation of soil of well walls, filling of the well with concrete mix and compaction. Above the well head they install a process conductor device, a soil compaction unit device is mounted on it, comprising a flexible right soil compacting case, which is placed into the well for its entire depth, including the well bottomhole, the flexible tight soil compacting case is filled with compressed air of high pressure, simultaneously carrying out fixation of soil in well walls and bottomhole with their subsequent compaction for at least 6 hours. Prior to concreting, they release compressed air from the flexible tight soil-compacting case, then the soil compacting unit is withdrawn from the process conductor, a concreting unit device is mounted onto the process conductor with a concrete compactor stand, comprising a flexible tight concrete compacting case, which is placed in the centre of the well, then the well is filled with concrete mix for its entire depth, the concrete mix is compacted simultaneously through all of its volume with the help of a fleible tight concrete compacting case, which is filled with compressed air of high pressure, and maximum design pressure is maintained for the whole period of full concrete strength gain. The upper layer of the concrete mix in the well head is additionally compacted with a depth vibrator, and if concrete gains strength of at least 30%, the process conductor is dismantled with the concreting unit, at the same time they leave the stand of the concrete compactor in the body of the bored pile.

EFFECT: increased manufacturability of bored piles manufacturing, reduced labour intensiveness, material intensity and energy intensity of a complex of construction processes, reduction of duration and cost of works.

4 cl, 8 dwg

Description

The invention relates to the construction of buildings and structures, namely the production of underground structures for various purposes in dispersed soils using special devices that increase the manufacturability of their manufacturing processes.

A known method of fixing the walls of wells in dispersed soils using a sealed film case filled with high-pressure compressed air (RF patent No. 2439245, publ. 10.01.2012, bull. No. 1) [1].

This method consists in the fact that the walls of the well are kept from shedding with a protective film. As a protective film, a sealed film case is used, which is placed in the well and filled with compressed air. Moreover, the lower part of the pencil case is heavier by soldering the load, and in the upper part the valve block with a manometer is placed and connected to a source of compressed air.

In the method of attaching the walls of the well in dispersed soils, the design of the device for its implementation does not provide compaction of crumbled soil in the bottom of the well.

Closest to the proposed solution is: a method of manufacturing bored piles (V. Telichenko et al. Technology of building processes, part 1, Moscow, Higher school, 2002, p.197) [2].

This method consists in lowering the casing into the drilled well, crumbling soil from the well, filling the well with concrete in separate portions, ramming the concrete with these portions and gradually removing the casing.

In this method, the manufacture of bored piles is carried out using casing pipes, which is technologically complex, time-consuming, material-intensive, energy-intensive and expensive.

The objective of the invention is to increase the manufacturability of the manufacture of bored piles, reducing the complexity, materials and energy consumption of a complex of construction processes, reducing the duration and cost of work.

To solve the problem in a known method of manufacturing bored piles, which consists in pre-drilling the well to a predetermined depth, attaching the soil to the walls of the well, filling the well with concrete mixture with a seal, according to the invention, a technological conductor device is installed above the wellhead, a soil compaction unit is mounted on it, containing a flexible sealed soil packing case, which is placed in the well to its entire depth, including the bottom hole, fill the bend a sealed soil packing case with high pressure compressed air, while fixing the soil of the walls of the well and bottom with subsequent compaction for at least 6 hours, before concreting, compressed air is released from the flexible sealed soil packing case, then the soil packing block is removed from the process conductor and mounted on technological conductor device of a concrete block with a stand of a concrete compactor containing a flexible sealed concrete sealing foam al, which is placed in the center of the well, then fill the well with concrete mixture to its entire depth, compact the concrete mixture simultaneously over its entire volume using a flexible sealed concrete-packing case, which is filled with high-pressure compressed air and maintains the maximum design pressure for the entire period of a full set of strength concrete, while the top layer of the concrete mixture at the wellhead is densified with a deep vibrator, and when the concrete strength is set to at least 30%, the technological conductor is removed from the concrete unit, while leaving the stand of the concrete compactor in the body of the bored pile.

A technological conductor device comprising a cone-shaped metal head, a support flange with holes for bolt connection, and four holes for mounting retaining fingers.

The device of the soil sealing block, comprising a connecting flange platform with four locking fingers, with a high pressure compressed air receiver, a connecting pipe of compressed air with a discharge and release valve, a compressed air supply pressure gauge, a flexible sealed cylindrical soil-tight sealing case made of easily moving non-blown material, with a length of 20 ... 30 cm more than the depth of the well, with a diameter of 15 ... 20 cm greater than the diameter of the well, at the lower end of which there is a meta A pointed tapered tip with a diameter at the base of 10 ... 15 cm less than the diameter of the well, while a flexible sealed soil sealing case is attached with a tension clamp to the receiver of high pressure compressed air.

The device of the concrete block containing a vertical concrete pipe, a stand of a concrete seal, a connecting flange platform, while the vertical concrete pipe is made with a funnel for receiving concrete mixture in its upper part and a locking sleeve at its lower end, the concrete seal tower contains a flexible, sealed concrete-packing cylinder with a diameter of 25 ... 50 cm, inside of which passes a vertical plastic thick-walled compressed air pipeline with an internal diameter of at least 32 mm, at m in the lower part of the pipeline perforation of 20 ... 30 cm was performed and a metal tip 50 ... 70 cm long was fixed, to the upper end of which a support sleeve is mounted to support the concrete pipe and a tension sleeve for attaching the lower end of the flexible sealed concrete-sealing case, while the pipeline is additionally equipped with a high-pressure a compressed air blower nipple located in its upper part and a tension sleeve for attaching the upper end of a flexible sealed concrete sealing canister, and a connecting flange platform and with four locking pins built into it contains two nozzle-holder with mounting bolts for the vertical pipe and betonolitnoy betonouplotnitelya rack.

The essence of the proposed method is illustrated by drawings, where:

- in FIG. 1 - a diagram of the installation of the technological conductor and installation of the soil compaction unit (top view);

- in FIG. 2 is a section AA in FIG. one;

- in FIG. 3 - installation diagram of a concrete block (top view);

- in FIG. 4 is a section BB in FIG. 3;

- in FIG. 5 is a diagram of the installation of a concrete compactor in a well (top view);

- in FIG. 6 is a section BB of FIG. 5;

- in FIG. 7 is a diagram of a formed bored pile (top view);

- in FIG. 8 is a section GG in FIG. 7.

The device of the technological conductor 2, containing a cone-shaped metal tip 3, a support flange 5 with holes 6 for bolt connection and four holes 7 for the locking fingers 8 of the mounting fixation of the sealing block 9 and the concrete block 18.

The device of the sealing block 9, containing a connecting flange platform 10 with four retaining fingers 8, with a receiver 13 of high-pressure compressed air. The connecting pipe 14 of compressed air with a discharge trigger valve 15, a pressure gauge 16 for controlling the supply of compressed air. Flexible sealed soil-tight packing case 11 of a cylindrical shape made of easily movable windproof material, 20 ... 30 cm longer than the depth of well 1, with a diameter of 15 ... 20 cm greater than the diameter of well 1, at the lower end of which there is a metal pointed tip 17 of a conical shape with a diameter at the base 10 ... 15 cm less than the diameter of the borehole 1. At the same time, a flexible sealed soil sealing case 11 is attached with a tension clamp 12 to the receiver 13 of high-pressure compressed air.

The device of the concrete block 18, containing a vertical concrete pipe 23, a stand of a concrete compactor 26, a connecting flange platform 19. In this case, a vertical concrete pipe 23 is made with a funnel 24 for receiving concrete mixture 34 in its upper part and a lock sleeve 25 at its lower end. The stand of the concrete compactor 26 contains a flexible sealed concrete sealing case 27 of a cylindrical shape with a diameter of 25 ... 50 cm, inside of which passes a vertical plastic thick-walled compressed air pipe 28 with an internal diameter of at least 32 mm, while perforation of 20 ... 30 cm is carried out in the lower part of the pipeline and fixed a metal tip 31 with a length of 50 ... 70 cm, to the upper end of which is mounted a support sleeve 32 for stopping the concrete pipe 23 and a tension sleeve 33 for fastening the lower end of the flexible sealed concrete first case 27. In this case, the pipeline 28 is additionally equipped with a high-pressure nipple of the compressed air blower 30 located in its upper part and a tension sleeve 29 for fastening the upper end of the flexible sealed concrete-sealing case 27. The connecting flange platform 19 with four retaining fingers 8 contains two nozzles built into it - holder 20, 21 with mounting bolts 22 for the vertical concrete pipe 23 and the stand of the concrete compactor 26.

The proposed method and device operate as follows. After drilling in the soil mass of the well 1, a technological conductor 2 is installed, which is formed by a cone-shaped metal head 3 for compaction of the soil at the mouth 4 of the well 1, a supporting flange 5 with holes 6 for bolt connection and four holes 7 for the locking fingers 8 of the mounting fixation of the soil compaction unit 9 and concrete block 18.

Installation of the soil sealing block 9 is started by docking the connecting flange platform 10 of the soil sealing block 9 with the support flange 5 of the technological jig 2, and the flexible sealed soil sealing case 11 is fixed with a tension clamp 12 on the receiver 13 of high pressure compressed air built into the connecting flange platform 10 of the soil sealing block 9. Connection the flange platform 10 is equipped with a connecting pipe 14 of compressed air, a discharge and release valve 15 and a pressure gauge 16 under Chi compressed air. The metal pointed tip 17 of the flexible sealed soil sealing case 11 has a conical shape, the diameter at the base is 10 ... 15 cm less than the diameter of the well 1. Soil compaction of the walls of the well 1 and bottomhole is carried out for at least 6 hours.

Upon completion of the process of compaction of the soil walls in the well 1 and dismantling of the soil compaction block 9, a concrete block 18 is mounted, including a connecting flange platform 19 with four retaining fingers 8, nozzles-holders 20, 21 with mounting bolts 22 integrated into the platform 19, respectively, for a concrete pipe 23 with a funnel 24 for receiving concrete mixture 34 at the top and a locking sleeve 25 at its lower end for the stand of the concrete compactor 26. The stand of the concrete compactor 26 consists of a flexible sealed concrete sealing case 27 cylinder shape with a diameter of 25 ... 50 cm. Inside the flexible sealed concrete-packing case 27, there passes a vertical plastic thick-walled compressed air pipe 28 with an internal diameter of at least 32 mm with perforation of 20 ... 30 cm of its lower end and a tension sleeve for attaching 29 flexible sealed concrete-packing case 27, which is installed at the top of the pipe 28 below the location of its pipe-holder 21, a high-pressure nipple-blower 30 of compressed air at the upper end of the pipe 28 and the metal tip 31 at the lower end of the pipeline 28, 50 ... 70 cm long, the tip of which is immersed in the bottom hole of the well 1 by 10 ... 15 cm. A support sleeve 32 is attached to the upper end of the metal tip 31 for stopping the concrete pipe 23 and a tension sleeve 33 for fastening the lower end of the flexible tight concrete canister 27.

Concreting of the well 1 is carried out continuously to its full design depth using the standard technology of lifting a vertically movable concrete pipe 23 after assembly and installation of the concrete block 18, where the initial vertical position of the concrete pipe 23 is fixed with a mounting bolt 22, which is supported by its locking sleeve 25 on the support sleeve 32 the racks of the concrete compactor 26 and have the lower end of the concrete pipe 23 relative to the bottom of the well 1 not less than 40 cm

Upon completion of concreting of the well 1, the concrete pipe 23 is removed from the holder pipe 20 and the concrete mixture 34 is compacted in the well 1, compressed air is pumped into a flexible sealed concrete-packing case 27. The compressed air pressure is increased in design mode after preliminary testing of the concrete mixture compaction process 34 in the specific conditions of work. In this case, the air cavity 35 of the flexible sealed concrete sealing case 27 at the end of the compaction process acquires a conical shape with increasing expansion from bottom to top, as shown in FIG. 6 and FIG. 8. The maximum design pressure of compressed air in a flexible sealed concrete sealing case 27 is maintained until the completion of a complete set of concrete strength 36. The upper layer of the concrete mixture at the wellhead is densified with a depth vibrator. When the concrete strength 36 is set to at least 30%, the technological conductor 2 with the concrete block 18 is removed, while leaving the stand of the concrete compactor 26 in the body of the bored pile, as shown in FIG. 8.

Thus, the manufacture of bored piles for the construction of underground parts of buildings and structures by the proposed method can significantly reduce the total labor costs for their construction, material and energy consumption, use new technology and a complex of construction processes, reduce the duration and cost of construction of underground parts of buildings and structures.

Claims (4)

1. A method of manufacturing bored piles, which consists in pre-drilling the well to a predetermined depth, attaching the soil to the walls of the well, filling the well with concrete mixture with a seal, characterized in that a technological conductor device is installed above the wellhead, and a soil sealing unit device is mounted on it containing a flexible tight a soil compacting case, which is placed in the well to its entire depth, including the bottom of the well, is filled with a flexible, tight soil sealing case compressed air of high pressure, at the same time fixing the soil of the walls of the borehole and the bottomhole with their subsequent compaction for at least 6 hours, before concreting, compressed air is released from a flexible sealed soil-sealing case, then the soil-sealing block is removed from the technological conductor, the device of concreting a block with a stand of a concrete compactor containing a flexible sealed concrete sealing case, which is placed in the center of the well, then m fill the well with concrete mixture to its entire depth, compact the concrete mixture simultaneously over its entire volume using a flexible sealed concrete-packing case, which is filled with high-pressure compressed air and maintains the maximum design pressure for the entire period of the concrete strength set, while the top layer of concrete mixture at the wellhead, they are compacted with a deep vibrator, and when the concrete strength is set to at least 30%, the technological conductor with the concrete block is dismantled, while leaving the concrete stand ouplotnitelya in the body of bored piles. 2. The device of the technological conductor used in the method according to claim 1, comprising a cone-shaped metal head, a support flange with holes for bolting and four holes for mounting retaining fingers. 3. The device of the soil sealing block used in the method according to claim 1, comprising a connecting flange platform with four locking fingers, with a high pressure compressed air receiver, a connecting pipe of compressed air with a discharge and release valve, a compressed air supply pressure gauge, a flexible sealed soil sealing case a cylindrical shape from easily moving windproof material, 20 ... 30 cm longer than the depth of the well, with a diameter of 15 ... 20 cm greater than the diameter of the well, in the lower at the end of which there is a metal pointed tip of a cone-shaped shape with a diameter at the base 10 ... 15 cm less than the diameter of the well, while a flexible sealed soil sealing case is attached with a tension clamp to a high-pressure compressed air receiver. 4. The device of the concrete block used in the method according to claim 1, comprising a vertical concrete pipe, a stand of a concrete compactor, a connecting flange platform, and a vertical concrete pipe made with a funnel for receiving concrete mixture in its upper part and a locking sleeve at its lower end, a rack the concrete compactor contains a flexible sealed concrete-sealing canister of cylindrical shape with a diameter of 25 ... 50 cm, inside of which passes a vertical plastic thick-walled compressed air pipeline with an internal m with a diameter of at least 32 mm, while in the lower part of the pipeline perforation of 20 ... 30 cm was performed and a metal tip 50 ... 70 cm long was fixed, to the upper end of which a support sleeve was mounted to support the concrete pipe and a tension sleeve for attaching the lower end of the flexible sealed concrete a canister, while the pipeline is additionally equipped with a high-pressure nipple of a compressed air blower located in its upper part and a tension sleeve for attaching the upper end of a flexible sealed concrete-packing canister, and with edinitelnaya flanged platform with four locking pins built into it contains two nozzle-holder with mounting bolts for the vertical pipe and betonolitnoy betonouplotnitelya rack.

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