CN114215044B

CN114215044B - Pressure-bearing uplift pile with rear-inserted unbonded steel strand U-shaped pipe and construction method thereof

Info

Publication number: CN114215044B
Application number: CN202111548328.3A
Authority: CN
Inventors: 陈磊; 葛振峰; 傅斐亮
Original assignee: Hangzhou Senzhu Construction Engineering Co ltd
Current assignee: Hangzhou Senzhu Construction Engineering Co ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2023-04-07
Anticipated expiration: 2041-12-17
Also published as: CN114215044A

Abstract

The invention provides a pressure-bearing uplift pile with a U-shaped pipe inserted with an unbonded steel strand at the back and a construction method thereof, relating to the technical field of uplift piles and comprising the following steps: pile body and frame-shaped concrete block; a foundation is poured at the upper end of the pile body, the pile body is of a tubular structure, a square blind hole is formed in the center of the upper end face of the pile body, and a driving part is arranged in the square blind hole in the pile body; and the frame-shaped concrete block is poured inside the construction foundation pit. According to the uplift pile, the arrangement of the reinforcing threaded barrel can effectively improve the friction force between the peripheral surface of the uplift pile and an underground soil layer, and the arrangement of the jacking plate can enable the uplift pile to bring effective warning effect to workers when the uplift height is too high, so that the problems that the friction force between the uplift pile and the underground soil layer needs to be improved due to the lack of a reinforcing structure on the existing uplift pile, and the effective warning effect cannot be brought to the workers when the existing uplift pile floats too high are solved.

Description

Pressure-bearing uplift pile with rear-inserted unbonded steel strand U-shaped pipe and construction method thereof

Technical Field

The invention relates to the technical field of uplift piles, in particular to a pressure-bearing uplift pile with a U-shaped pipe inserted with an unbonded steel strand and a construction method thereof.

Background

In the middle of building, in order to keep stable, generally need to pile in the underground, and uplift pile widely applies to large basement anti-floating, high-rise building uplift, offshore dock platform uplift, anchor pile foundation of suspension bridge and cable-stayed bridge, pile foundation of large ship dock floor and anchor pile foundation in the dead load test pile, etc., and because the inside of the underground soil layer contains a large amount of groundwater, and groundwater still can resist and pull out the pile and produce buoyancy, so at present, generally carry out anti-floating through anchor slab and ground tackle.

For example, application No.: CN202110444079.7, and a construction method thereof. The uplift pile construction adopts a pile forming process of hole forming and concrete pouring by a drilling machine, before the initial setting of the pile body concrete, a hammer pipe is adopted to insert the unbonded steel strand and U-shaped pipe pressure-bearing member combination body into a specified elevation position in the concrete pile body, and finally the unbonded steel strand is tensioned and locked at the top of the pile, in the foundation or on the upper part of the foundation through an anchor plate and an anchorage device. The method has the advantages that the post-inserting process is adopted, the construction speed is high, the U-shaped pipe pressure-bearing member is simple and convenient to install, the lower end part does not need to be provided with an anchor head anchorage device, the construction quality is good, and the uplift resistance bearing capacity of the pile body is high. Compared with the common uplift pile, the pile body crack problem does not need to be considered, the consumption of main materials is less, and the manufacturing cost is low; compare with anti-floating anchor rod, this application pile body material adopts the concrete, and is more reliable than grout or the mortar quality that anti-floating anchor rod adopted, and main material protective layer thickness is big, and the bearing capacity is higher, and the durability is better.

However, the uplift pile in the above patent is when using, though through adopting the unbonded steel strand wires, can avoid the pile body to produce the crack phenomenon, but owing to lack effectual reinforced structure on the above-mentioned uplift pile, make the friction dynamics between uplift pile outer peripheral face and the underground soil layer remain to improve, and above-mentioned uplift pile can only carry out anti-floating through anchor slab and ground tackle, thereby the anti-floating effect of uplift pile has been reduced, moreover, current uplift pile is when detecting the come-up height, owing to can only be through observing the mark of uplift pile upper end mark in advance, then the height of uplift pile come-up is measured to the height of rethread mark come-up, not only make uplift pile come-up height visual inadequately when detecting, and when uplift pile come-up height is too high, can not bring effectual warning effect for the staff, thereby uplift pile's security has been reduced.

Disclosure of Invention

In view of the above, the invention provides a pressure-bearing uplift pile with a back-inserted unbonded steel strand U-shaped pipe and a construction method thereof, friction between the outer peripheral surface of the uplift pile and an underground soil layer can be effectively improved through the arrangement of a reinforcing threaded cylinder, and the uplift pile can bring an effective warning effect to workers when the uplift height is too high through the arrangement of a jacking plate.

The invention provides a pressure-bearing uplift pile with a U-shaped pipe inserted with an unbonded steel strand at the back and a construction method thereof, and the construction method specifically comprises the following steps: pile body and frame-shaped concrete block; a foundation is poured at the upper end of the pile body, the pile body is of a tubular structure, a square blind hole is formed in the center of the upper end face of the pile body, and a driving part is arranged in the square blind hole in the pile body; the frame-shaped concrete block is poured inside the construction foundation pit, a gasket is arranged on the upper end face of the frame-shaped concrete block, and the upper surface of the gasket is in contact with the bottom end face of the foundation; a jacking plate is fixedly connected to the rear side of the upper end face of the foundation; the utility model discloses a pile body, including the pile body, the pile body periphery is personally submitted evenly and is seted up with the inside communicating four circular through-holes of four groups of square blind holes, and the quantity of the circular through-hole of every group is four, and four circular through-holes of every group are the annular array form and distribute on the pile body, and every circular through-hole is inside all to rotate through the axle sleeve and is connected with a threaded rod, and bevel gear A of the equal fixedly connected with of every threaded rod medial extremity, a bar spout has all been seted up to the inside upside of every circular through-hole, and every threaded rod outside all has a reinforcing thread section of thick bamboo through threaded connection.

Optionally, a sealing plate is fixedly connected to the upper end of the pile body, four unbonded steel stranded wires are arranged on the pile body in an annular array shape, the lower end of each unbonded steel stranded wire is distributed in a U-shaped bent shape, and a U-shaped pipe bearing part is sleeved at the U-shaped bent part of each unbonded steel stranded wire; every consolidate a screw section of thick bamboo outside medial extremity all is provided with a sliding block, and sliding block and an adjacent bar spout sliding connection, and every consolidates screw section of thick bamboo outer peripheral surface diameter all equals with circular through-hole inner peripheral surface diameter, and every consolidates screw section of thick bamboo head end and is the toper structure.

Optionally, a fixing plate is fixedly connected to the middle of the upper end surface of the foundation, and a supporting table is mounted on the upper end surface of the fixing plate; the fixed plate is fixedly connected with the upper ends of the four unbonded steel stranded wires.

Optionally, the driving part comprises a vertical rotating shaft, a driving worm, a worm gear and bevel gears B, the vertical rotating shaft is rotatably connected inside square blind holes formed in the pile body through a rotating support block, four bevel gears B are fixedly connected to the outer part of the vertical rotating shaft in an even shape, the bevel gears B are meshed with the bevel gears A, and the worm gear is fixedly connected to the upper end of the vertical rotating shaft; the driving worm is rotatably connected to the upper end face of the supporting table through a rotating shaft support, the driving worm is meshed with the worm wheel, and a rotating hand wheel is arranged at the right end of the driving worm.

Optionally, the rear side of the upper part of the frame-shaped concrete block is fixedly connected with a v-21274by a U-shaped fixing rod, the rear side of the upper end surface of the v-21274is fixedly connected with four vertical sliding rods, and the upper ends of the four vertical sliding rods are welded with top plates; the protection box body is installed to the roof up end, and protection box body internally mounted has button cell box, installs button cell on the button cell box.

Optionally, four corners of the top pressure plate are fixedly connected with a sliding cylinder, the four sliding cylinders are respectively connected to the outsides of the four vertical sliding rods in a sliding manner, and the four sliding cylinders are fixedly connected to the inside of the foundation; the rear side of the upper end face of the jacking plate is fixedly connected with a graduated scale, a T-shaped pressing block is arranged in the middle of the upper end face of the jacking plate, and the front end face of the graduated scale is in contact with the rear end face of the top plate.

Optionally, the rear end face of the top plate is fixedly connected with an alignment arrow, the front end face of the alignment arrow is in contact with the rear end face of the scale, the rear end face of the top plate is provided with a miniature alarm, the middle of the bottom end face of the top plate is provided with a pressing type control switch, the bottom end face of the top plate is located outside the pressing type control switch and is provided with a protection frame, and the miniature alarm is electrically connected with the button cell box through the pressing type control switch.

Optionally, when the top pressing plate moves upwards to the maximum moving height, the upper end surface of the T-shaped pressing block is in close contact with a bottom button of the pressing control switch.

Optionally, the bottom end surface of the protection frame and the bottom end surface of the press control switch are at the same horizontal plane, and when the bottom button of the press control switch is in a press state, the bottom end surface of the protection frame will contact with the upper end surface of the T-shaped press block.

Optionally, the method comprises the following steps: firstly, drilling a foundation pile hole in a foundation pit through rotary drilling equipment, then placing a pile body into the foundation pile hole, then placing a frame-shaped concrete block on the bottom end surface of the interior of the foundation pit, sleeving the frame-shaped concrete block outside the upper end of the pile body, and fixedly connecting the frame-shaped concrete block with the interior of the foundation pit; then placing the gasket on the upper end face of the frame-shaped concrete block, pouring the upper end face of the gasket to form a foundation, and fixing the fixing plate on the upper end face of the foundation to enable the driving worm to be meshed with the worm wheel; then, the worm is driven by manual clockwise rotation, so that the worm wheel drives the vertical rotating shaft to rotate in a forward direction, and then the vertical rotating shaft drives the four bevel gears B to rotate, so that each bevel gear B drives the corresponding four bevel gears A to rotate respectively; and then, synchronously rotating four threaded rods at the same height, simultaneously moving the corresponding four reinforcing threaded cylinders outwards under the action of the threads, and inserting the head ends of the reinforcing threaded cylinders into a soil layer in the foundation pile hole, so that the operation steps of the uplift pile construction method are completed.

Advantageous effects

According to the uplift pile of each embodiment of the invention, compared with the traditional uplift pile, through the arrangement of the reinforcing thread cylinder, during the reinforcing operation, only the worm is driven by manual clockwise rotation to drive the worm gear to drive the vertical rotating shaft to rotate forwardly, then the vertical rotating shaft drives the four bevel gears B to rotate, so that each bevel gear B respectively drives the corresponding four bevel gears A to rotate, thereby the four threaded rods with the same height synchronously rotate, then the corresponding four reinforcing thread cylinders simultaneously move outwards under the action of the threads, and the head ends of the reinforcing thread cylinders are inserted into the soil layer inside the pile hole, so that the friction force between the outer peripheral surface of the uplift pile and the underground soil layer is effectively improved, the uplift pile is more stable inside the pile hole, and the anti-floating effect of the uplift pile can be effectively improved through the reinforcing thread cylinders inserted into the soil layer inside the pile hole.

In addition, through the setting of roof pressure plate, during the pile body come-up, because outside and the basic fixed connection of sliding tube, and inside and vertical slide bar sliding connection of sliding tube, thereby make the basis also follow rebound under the ascending thrust effect of pile body, and the frame concrete piece will be immovable in the foundation ditch, then the basis drives the roof pressure plate, the T type is pressed briquetting and scale rebound, through the scale and the cooperation of aiming at the arrow point, make the staff can audio-visual observation scale rebound's distance, can audio-visual come-up height that detects the pile body.

In addition, press the cooperation of piece and push type control switch through the T type, when the pile body continues the come-up, the basis will continue to drive roof pressure plate, the T type is pressed piece and scale rebound, then press the piece upper end through the T type and press push type control switch bottom button and press, thereby with miniature siren drive, make miniature siren begin to report to the police, thereby make this uplift pile when the height of floating is too high, can bring timely effectual warning effect for the staff, thereby the security of this uplift pile has been improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.

The drawings in the following description relate to some embodiments of the invention only and are not intended to limit the invention.

In the drawings:

fig. 1 shows a schematic view of a front axial view of a uplift pile according to an embodiment of the invention;

fig. 2 shows a schematic view of a bottom axial view of a uplift pile according to an embodiment of the invention;

fig. 3 shows a schematic view of a uplift pile in a state according to an embodiment of the present invention;

FIG. 4 shows a schematic diagram at a partial enlargement in FIG. 1 according to an embodiment of the invention;

FIG. 5 shows a schematic view of a pile body and unbonded steel strands in a separated state according to an embodiment of the invention;

FIG. 6 shows a schematic diagram at a partial enlargement B of FIG. 5, according to an embodiment of the invention;

figure 7 shows a schematic view in partial cross-section of a pile body according to an embodiment of the invention;

FIG. 8 shows a schematic view of a frame-shaped concrete block and a v-shaped holding plate according to an embodiment of the present invention in a disassembled state;

fig. 9 shows a schematic view of a top plate and a top press plate member according to an embodiment of the present invention.

List of reference numerals

1. A pile body; 101. a sealing plate; 102. reinforcing the threaded cylinder; 103. the unbonded steel strand is used for the production of the steel strand; 104. a U-shaped pipe pressure bearing member; 105. a threaded rod; 106. a bevel gear A; 107. a slider; 108. a circular through hole; 109. a strip-shaped chute; 2. a foundation; 201. a fixing plate; 202. a support table; 3. a drive section; 301. a vertical rotating shaft; 302. a drive worm; 303. a worm gear; 304. a bevel gear B; 4. a frame-shaped concrete block; 401. a fixing plate shaped like a Chinese character 'tu'; 402. a U-shaped fixing rod; 403. a vertical slide bar; 404. a top plate; 405. a protective box body; 406. a button cell box; 407. aligning an arrow; 408. a miniature alarm; 409. a press type control switch; 4010. a protective frame; 5. pressing the plate; 501. a sliding cylinder; 502. a graduated scale; 503. a T-shaped pressing block; 6. and (6) a gasket.

Detailed Description

In order to make the objects, aspects and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. Unless otherwise indicated, terms used herein have the ordinary meaning in the art. Like reference numerals in the drawings denote like elements.

Example (b): please refer to fig. 1 to fig. 9:

the invention provides a pressure-bearing uplift pile with a U-shaped pipe inserted with an unbonded steel strand at the back and a construction method thereof, wherein the construction method comprises the following steps: a pile body 1 and a frame-shaped concrete block 4; a foundation 2 is poured at the upper end of the pile body 1, the pile body 1 is of a tubular structure, a square blind hole is formed in the center of the upper end face of the pile body 1 and used for installing the vertical rotating shaft 301, and a driving part 3 is arranged in the square blind hole in the pile body 1; the frame-shaped concrete block 4 is poured in the construction foundation pit, the gasket 6 is arranged on the upper end face of the frame-shaped concrete block 4, the upper surface of the gasket 6 is in contact with the bottom end face of the foundation 2, and the frame-shaped concrete block 4 and the foundation 2 are prevented from being fixed together through the gasket 6, so that the frame-shaped concrete block 4 cannot be driven to move when the foundation 2 moves upwards; the rear side of the upper end surface of the foundation 2 is fixedly connected with a jacking plate piece 5; four groups of circular through holes 108 communicated with the interior of the square blind hole are uniformly formed in the outer periphery of the pile body 1, the number of each group of circular through holes 108 is four, each group of four circular through holes 108 are distributed on the pile body 1 in an annular array shape, a threaded rod 105 is rotatably connected to the interior of each circular through hole 108 through a shaft sleeve, the inner side end of each threaded rod 105 is fixedly connected with a bevel gear A106, a strip-shaped sliding groove 109 is formed in the upper side of the interior of each circular through hole 108, and a reinforcing threaded cylinder 102 is connected to the exterior of each threaded rod 105 through threads; the upper end of the pile body 1 is fixedly connected with a sealing plate 101, four unbonded steel stranded wires 103 are arranged on the pile body 1 in an annular array manner, the overall strength of the pile body 1 is improved by arranging the unbonded steel stranded wires 103, the lower ends of the unbonded steel stranded wires 103 are distributed in a U-shaped bending manner, the bearing capacity of the bending part of the unbonded steel stranded wires 103 is improved, and the U-shaped bending part on the unbonded steel stranded wires 103 is sleeved with a U-shaped bearing part 104; every reinforcement screw thread section of thick bamboo 102 outside medial extremity all is provided with a sliding block 107, and sliding block 107 and its adjacent bar spout 109 sliding connection, thereby obtain effective limiting displacement when can making reinforcement screw thread section of thick bamboo 102 remove, every reinforcement screw thread section of thick bamboo 102 outer peripheral face diameter all equals with circular through-hole 108 inner peripheral face diameter, and every reinforcement screw thread section of thick bamboo 102 head end is the toper structure, through the setting of reinforcement screw thread section of thick bamboo 102, thereby make the friction dynamics between this uplift pile outer peripheral face and the secret soil layer effectively improve, thereby make this uplift pile more firm in foundation pile downthehole portion.

In addition, according to the embodiment of the present invention, as shown in fig. 1 and 5, a fixing plate 201 is fixedly connected to the middle of the upper end surface of the foundation 2, and a supporting table 202 is installed on the upper end surface of the fixing plate 201 for supporting the driving worm 302; the fixing plate 201 is fixedly connected with the upper ends of the four unbonded steel strands 103, so that the connection between the foundation 2 and the upper end of the pile body 1 is more stable;

as shown in fig. 1 and 4, the driving part 3 includes a vertical rotating shaft 301, a driving worm 302, a worm wheel 303 and a bevel gear B304, the vertical rotating shaft 301 is rotatably connected inside a square blind hole formed on the pile body 1 through a rotating support block, four bevel gears B304 are fixedly connected to the outside of the vertical rotating shaft 301 in an even shape, the bevel gears B304 are meshed with the bevel gears a106, and the upper end of the vertical rotating shaft 301 is fixedly connected with the worm wheel 303; the driving worm 302 is rotatably connected to the upper end face of the support table 202 through a rotating shaft support, the driving worm 302 is meshed with the worm wheel 303, a rotating hand wheel is arranged at the right end of the driving worm 302, so that the vertical rotating shaft 301 can rotate more conveniently, the reinforcing thread cylinder 102 can be inserted into a soil layer in the foundation pile hole on the ground through the arrangement of the driving part 3, and the convenience in operation of the reinforcing thread cylinder 102 is improved;

as shown in fig. 8 and 9, a v-shaped fixing plate 401 is fixedly connected to the rear side of the upper part of the frame-shaped concrete block 4 through a U-shaped fixing rod 402, four vertical sliding rods 403 are fixedly connected to the rear side of the upper end face of the v-shaped fixing plate 401, and top plates 404 are welded to the upper ends of the four vertical sliding rods 403; the upper end face of the top plate 404 is provided with the protective box body 405, the button battery box 406 is arranged in the protective box body 405, the button battery is arranged on the button battery box 406, and the service life of the button battery can reach 5-10 years by arranging the button battery in the button battery box 406, so that the reliability of the miniature alarm 408 when alarming is needed is ensured; an alignment arrow 407 is fixedly connected to the rear end face of the top plate 404, the front end face of the alignment arrow 407 is in contact with the rear end face of the graduated scale 502, the floating height of the pile body 1 can be visually observed through the cooperation of the alignment arrow 407 and the graduated scale 502, a miniature alarm 408 is mounted on the rear end face of the top plate 404, a pressing type control switch 409 is mounted in the middle of the bottom end face of the top plate 404, a pressing type protection frame 4010 is mounted on the bottom end face of the top plate 404, located outside the pressing type control switch 409, and used for protecting the pressing type control switch 409, and the miniature alarm 408 is electrically connected with a button battery box 406 through the pressing type control switch 409;

as shown in fig. 8 and 9, four corners of the top pressure plate 5 are fixedly connected with a sliding cylinder 501, the four sliding cylinders 501 are respectively slidably connected to the outsides of the four vertical sliding rods 403, and the four sliding cylinders 501 are fixedly connected to the inside of the foundation 2; a graduated scale 502 is fixedly connected to the rear side of the upper end face of the jacking plate member 5, a T-shaped pressing block 503 is arranged in the middle of the upper end face of the jacking plate member 5, and the front end face of the graduated scale 502 is in contact with the rear end face of the top plate 404; when the jacking plate piece 5 moves upwards to the maximum moving height, the upper end surface of the T-shaped pressing block 503 is in close contact with the bottom button of the pressing control switch 409, so that the bottom button of the pressing control switch 409 can be effectively pressed, an alarm can be timely and effectively sent out when the floating height of the pile body 1 is too high, and a worker is warned to timely perform pile pressing treatment;

as shown in fig. 9, the bottom end surface of the protection frame 4010 is at the same horizontal plane as the bottom end surface of the pressing control switch 409, and when the bottom button of the pressing control switch 409 is in a pressing state, the bottom end surface of the protection frame 4010 contacts with the upper end surface of the T-shaped pressing block 503, and through the arrangement of the protection frame 4010, the phenomenon that the pressing control switch 409 is damaged when the T-shaped pressing block 503 is pressed upwards is avoided;

as shown in fig. 1, 4, 5 and 6, the following steps are included; firstly, drilling a foundation pile hole in a foundation pit by rotary drilling equipment, then placing a pile body 1 into the foundation pile hole, then placing a frame-shaped concrete block 4 on the bottom end surface of the interior of the foundation pit, sleeving the frame-shaped concrete block 4 outside the upper end of the pile body 1, and fixedly connecting the frame-shaped concrete block 4 with the interior of the foundation pit; then, placing the gasket 6 on the upper end face of the frame-shaped concrete block 4, then pouring the upper end face of the gasket 6 to form a foundation 2, and fixing the fixing plate 201 on the upper end face of the foundation 2 to enable the driving worm 302 to be meshed with the worm wheel 303; then, the worm 302 is driven by manual clockwise rotation, so that the worm wheel 303 drives the vertical rotating shaft 301 to rotate forward, and then the vertical rotating shaft 301 drives the four bevel gears B304 to rotate, so that each bevel gear B304 drives the corresponding four bevel gears A106 to rotate respectively; then, the four threaded rods 105 at the same height synchronously rotate, the corresponding four reinforcing threaded cylinders 102 simultaneously move outwards under the action of the threads, and the head ends of the reinforcing threaded cylinders 102 are inserted into the soil layer inside the foundation pile hole, so that the operation steps of the uplift pile construction method are completed.

The specific use mode and function of the embodiment are as follows: according to the method, firstly, a foundation pile hole is drilled in a foundation pit through rotary drilling equipment, then a pile body 1 is placed in the foundation pile hole, then a frame-shaped concrete block 4 is placed on the bottom end face of the interior of the foundation pit, the frame-shaped concrete block 4 is sleeved outside the upper end of the pile body 1, the frame-shaped concrete block 4 is fixedly connected with the interior of the foundation pit, then a gasket 6 is placed on the upper end face of the frame-shaped concrete block 4, then the upper end face of the gasket 6 is poured to form a foundation 2, and then a fixing plate 201 is fixed on the upper end face of the foundation 2, so that a driving worm 302 is meshed with a worm wheel 303; then, the worm 302 is driven by manual clockwise rotation, the worm wheel 303 drives the vertical rotating shaft 301 to rotate positively, then the vertical rotating shaft 301 drives the four bevel gears B304 to rotate, each bevel gear B304 drives the corresponding four bevel gears A106 to rotate, so that the four threaded rods 105 at the same height rotate synchronously, then the corresponding four reinforcing threaded cylinders 102 move outwards at the same time under the action of threads, and the head ends of the reinforcing threaded cylinders 102 are inserted into soil layers inside the foundation pile holes;

when the uplift pile floats upwards, firstly, the upper end of the pile body 1 drives the foundation 2 to move upwards, then the outer part of the sliding cylinder 501 is fixedly connected with the foundation 2, and the inner part of the sliding cylinder 501 is slidably connected with the vertical sliding rod 403, so that the foundation 2 also moves upwards under the action of the upward thrust of the pile body 1, the frame-shaped concrete block 4 is fixed and fixed in a foundation pit, and then the foundation 2 drives the jacking plate piece 5, the T-shaped pressing block 503 and the graduated scale 502 to move upwards; when the pile body 1 continues to float upwards, the foundation 2 continues to drive the jacking plate member 5, the T-shaped pressing block 503 and the graduated scale 502 to move upwards, and then the button at the bottom of the pressing control switch 409 is pressed through the upper end of the T-shaped pressing block 503, so that the miniature alarm 408 is driven, and the miniature alarm 408 starts to give an alarm.

Finally, it should be noted that, when describing the positions of the components and the matching relationship therebetween, the present invention is usually illustrated by one/a pair of components, however, it should be understood by those skilled in the art that such positions, matching relationship, etc. are also applicable to other/other pairs of components.

The above description is intended to be illustrative of the present invention and not to limit the scope of the invention, which is defined by the claims appended hereto.

Claims

1. Back inserts unbonded steel strand wires U type pipe pressure-bearing type uplift pile, its characterized in that includes: a pile body (1) and a frame-shaped concrete block (4); a foundation (2) is poured at the upper end of the pile body (1), the pile body (1) is of a tubular structure, a square blind hole is formed in the center of the upper end face of the pile body (1), and a driving part (3) is arranged in the square blind hole in the pile body (1); the frame-shaped concrete block (4) is poured inside the construction foundation pit, a gasket (6) is arranged on the upper end face of the frame-shaped concrete block (4), and the upper surface of the gasket (6) is in contact with the bottom end face of the foundation (2); a jacking plate piece (5) is fixedly connected to the rear side of the upper end face of the foundation (2); the pile body (1) is uniformly provided with four groups of circular through holes (108) communicated with the interior of the square blind hole, the number of each group of circular through holes (108) is four, the four circular through holes (108) of each group are distributed on the pile body (1) in an annular array shape, the interior of each circular through hole (108) is rotatably connected with a threaded rod (105) through a shaft sleeve, the inner side end of each threaded rod (105) is fixedly connected with a bevel gear A (106), the upper side of the interior of each circular through hole (108) is provided with a strip-shaped sliding groove (109), and the exterior of each threaded rod (105) is connected with a reinforcing threaded cylinder (102) through threads;

the upper end of the pile body (1) is fixedly connected with a sealing plate (101), four unbonded steel stranded wires (103) are arranged on the pile body (1) in an annular array shape, the lower end of each unbonded steel stranded wire (103) is distributed in a U-shaped bending shape, and a U-shaped pipe pressure bearing part (104) is sleeved at the U-shaped bending part on each unbonded steel stranded wire (103); each reinforcing thread cylinder (102) is provided with a sliding block (107) at the inner side end outside, the sliding block (107) is in sliding connection with an adjacent strip-shaped sliding groove (109), the diameter of the outer peripheral surface of each reinforcing thread cylinder (102) is equal to that of the inner peripheral surface of the circular through hole (108), and the head end of each reinforcing thread cylinder (102) is of a conical structure;

a fixing plate (201) is fixedly connected to the middle of the upper end face of the foundation (2), and a supporting table (202) is mounted on the upper end face of the fixing plate (201); the fixing plate (201) is fixedly connected with the upper ends of the four unbonded steel stranded wires (103);

the driving part (3) comprises a vertical rotating shaft (301), a driving worm (302), a worm wheel (303) and bevel gears B (304), the vertical rotating shaft (301) is rotatably connected inside a square blind hole formed in the pile body (1) through a rotating support block, the outer part of the vertical rotating shaft (301) is uniformly and fixedly connected with four bevel gears B (304), the bevel gears B (304) are meshed with the bevel gear A (106), and the upper end of the vertical rotating shaft (301) is fixedly connected with the worm wheel (303); the driving worm (302) is rotatably connected to the upper end face of the support table (202) through a rotating shaft support, the driving worm (302) is meshed with the worm wheel (303), and a rotating hand wheel is arranged at the right end of the driving worm (302);

the rear side of the upper part of the frame-shaped concrete block (4) is fixedly connected with a v-shaped fixing plate (401) through a U-shaped fixing rod (402), the rear side of the upper end surface of the v-shaped fixing plate (401) is fixedly connected with four vertical sliding rods (403), and the upper ends of the four vertical sliding rods (403) are welded with a top plate (404); a protective box body (405) is mounted on the upper end face of the top plate (404), a button battery box (406) is mounted inside the protective box body (405), and a button battery is mounted on the button battery box (406);

four corners of the jacking plate (5) are fixedly connected with a sliding cylinder (501), the four sliding cylinders (501) are respectively connected to the outer parts of the four vertical sliding rods (403) in a sliding manner, and the four sliding cylinders (501) are fixedly connected to the inner part of the foundation (2); a graduated scale (502) is fixedly connected to the rear side of the upper end face of the jacking plate piece (5), a T-shaped pressing block (503) is arranged in the middle of the upper end face of the jacking plate piece (5), and the front end face of the graduated scale (502) is in contact with the rear end face of the top plate (404);

an alignment arrow (407) is fixedly connected to the rear end face of the top plate (404), the front end face of the alignment arrow (407) is in contact with the rear end face of the graduated scale (502), a miniature alarm (408) is mounted on the rear end face of the top plate (404), a pressing type control switch (409) is mounted in the middle of the bottom end face of the top plate (404), a protective frame (4010) is mounted outside the pressing type control switch (409) on the bottom end face of the top plate (404), and the miniature alarm (408) is electrically connected with a button battery box (406) through the pressing type control switch (409);

when the jacking plate piece (5) moves upwards to the maximum moving height, the upper end surface of the T-shaped pressing block (503) is in close contact with a button at the bottom of the pressing type control switch (409);

the bottom end face of the protective frame (4010) and the bottom end face of the press type control switch (409) are in the same horizontal plane, and when the bottom button of the press type control switch (409) is in a press state, the bottom end face of the protective frame (4010) is in contact with the upper end face of the T-shaped press block (503).

2. The construction method of the pressure-bearing uplift pile with the back-inserted unbonded steel strand U-shaped pipe as claimed in claim 1, wherein the construction method comprises the following steps: the method comprises the following steps:

1) Firstly, drilling a foundation pile hole in a foundation pit by rotary drilling equipment, then placing a pile body (1) into the foundation pile hole, then placing a frame-shaped concrete block (4) on the bottom end surface of the interior of the foundation pit, sleeving the frame-shaped concrete block (4) outside the upper end of the pile body (1), and fixedly connecting the frame-shaped concrete block (4) with the interior of the foundation pit;

2) Then placing the gasket (6) on the upper end face of the frame-shaped concrete block (4), pouring the upper end face of the gasket (6) to form a foundation (2), and fixing the fixing plate (201) on the upper end face of the foundation (2) to enable the driving worm (302) to be meshed with the worm wheel (303);

3) Then, the worm (302) is driven by manual clockwise rotation, the worm wheel (303) drives the vertical rotating shaft (301) to rotate positively, then the vertical rotating shaft (301) drives the four bevel gears B (304) to rotate, and each bevel gear B (304) drives the corresponding four bevel gears A (106) to rotate respectively;

4) Then, four threaded rods (105) with the same height synchronously rotate, the corresponding four reinforcing threaded cylinders (102) simultaneously move outwards under the action of the threads, and the head ends of the reinforcing threaded cylinders (102) are inserted into soil layers inside the foundation pile holes, so that the operation steps of the uplift pile construction method are completed.