Static pressure prestressed pile pipe and static pressure pile forming construction method

Abstract

The invention belongs to the technical field of prestressed pile pipes, and discloses a static pressure prestressed pile pipe and a static pressure pile forming construction method.The static pressure prestressed pile pipe comprises a pipe pile, a connecting ring with the inner diameter equal to that of the pipe pile is integrally formed at one end of the pipe pile, the outer diameter of the connecting ring is smaller than that of the pipe pile, and an inserting groove matched with the connecting ring in an inserting mode is formed in the other end of the pipe pile; annular mounting grooves communicating with the inserting-connecting grooves are formed in the pipe piles, clamping-connecting grooves are formed in the outer walls of the connecting rings, and elastic positioning mechanisms which are connected with the clamping-connecting grooves in a clamped mode so as to achieve connection and fixation between the adjacent pipe piles are arranged in the annular mounting grooves. And the elastic positioning mechanism can retract into the annular mounting groove when the connecting ring is inserted into the annular mounting groove. The stability of the adjacent pipe piles after connection is guaranteed, and the connecting efficiency between the two pipe piles is improved.

Description

Technical Field

[0001] The invention relates to the technical field of prestressed pile pipes, and in particular to a static pressure prestressed pile pipe and a static pressure pile construction method. Background Art

[0002] Static pressure pile is a method of pile foundation construction. Static pressure pile construction is a pile sinking process that uses the pile driving mechanism of the static pile driver to provide reaction force with the deadweight of the pile driver and the counterweight on the frame to press the prefabricated pile into the soil. Static pressure pile: Advantages: It completely avoids the vibration, noise and pollution caused by hammering piles. Therefore, it has the advantages of no damage to the piles, no noise, no vibration, no impact and no pollution during construction.

[0003] A prestressed pipe pile snap-on quick connection structure is disclosed in a Chinese utility model patent with publication number CN219527631U, wherein a protruding pad is provided at the bottom of the upper pipe pile, a groove is formed between the protruding pad and the bottom surface of the upper pipe pile, and an L-shaped groove matched with the protruding pad is provided at the top of the lower pipe pile, the protruding pad can enter the groove body through the vertical part of the L-shaped groove and be laterally embedded in the horizontal part of the L-shaped groove, thereby realizing the connection between the upper pipe pile and the lower pipe pile.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: in the above-mentioned prestressed pipe piles, two adjacent pipe piles are connected to each other by snapping together between a protruding pad and an L-shaped groove. During the construction process, the lower pipe piles have been driven into the ground, and the upper pipe piles are usually aligned and spliced ​​with the lower pipe piles by hoisting. The upper pipe piles need to be rotated after being aligned with the L-shaped groove to snap into the horizontal groove body of the L-shaped groove. The pipe piles are usually made of concrete and steel bars, and it is relatively laborious to rotate the upper pipe piles. Therefore, it is necessary to improve the design of the related technologies. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a static pressure prestressed pile pipe and a static pressure pile construction method.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions: a static pressure prestressed pile pipe, including a pipe pile, one end of the pipe pile is integrally formed with a connecting ring equal to the inner diameter of the pipe pile, the outer diameter of the connecting ring is smaller than the outer diameter of the pipe pile, the other end of the pipe pile is provided with a plug-in groove that is plugged into the connecting ring, the pipe pile is provided with an annular mounting groove that is connected to the plug-in groove, the outer wall of the connecting ring is provided with a clamping groove, the annular mounting groove is provided with an elastic positioning mechanism that is clamped with the clamping groove to achieve connection and fixation between adjacent pipe piles, and the elastic positioning mechanism can be retracted into the annular mounting groove when the connecting ring is inserted into the annular mounting groove.

[0007] By adopting the above technical scheme, after the lower pipe pile is pressed into the ground by the pile driver, the upper pipe pile is aligned with the lower pipe pile by the hoisting machine, and when the connecting ring is plugged into the plug-in groove, the elastic positioning mechanism shrinks into the annular installation groove. After the connecting ring and the plug-in groove are plugged in, the elastic positioning mechanism is plugged into the clamping groove to achieve connection and fixation between adjacent pipe piles, which changes the traditional technology of rotating the upper pipe pile to achieve connection with the lower pipe pile, thereby reducing the construction difficulty.

[0008] Furthermore, a circular body cooperating with the circular mounting groove is arranged in the annular mounting groove, and the elastic positioning mechanism includes a limit assembly, an elastic assembly and a drive assembly, the limit assembly includes an arc-shaped rod body hinged to the inner wall of the annular body and a limit block hinged to one end of the arc-shaped rod body away from the inner wall of the annular body, a rotating shaft cooperating with the limit block is penetrated through the position of the limit block near its edge, the rotating shaft is rotatably installed in the annular mounting groove, a clearance groove for the arc-shaped rod body to be hinged is arranged at the intersection between the side of the limit block close to the inner wall of the annular body and the side of the limit block away from the rotating shaft, the limit block is engaged with the engaging groove under the action of the elastic assembly, and the drive assembly is used to drive the elastic assembly to contract and cause the limit block to contract into the annular mounting groove.

[0009] By adopting the above technical solution, when the connecting ring is plugged into the plug-in groove, the driving component drives the elastic component to contract and causes the limit block to contract into the annular mounting groove. When the connecting ring and the plug-in groove are completely plugged in, the limit block is reset under the action of the elastic component and is plugged into the plug-in groove, thereby realizing the connection and fixation between adjacent pipe piles.

[0010] Furthermore, the elastic component includes a movable block fixed on the inner wall of the annular body, a fixed block fixed on the inner bottom wall of the annular mounting groove, and an arc spring fixed between the fixed block and the movable block.

[0011] Furthermore, a strip groove is provided at a position on the outer wall of the pipe pile corresponding to the annular mounting groove, and an arc groove connected to the annular mounting groove and a connecting groove for connecting the arc groove and the strip groove are provided in the pipe pile, and the lengths of the connecting groove, the strip groove and the arc groove increase successively; the driving assembly includes an arc rack provided in the arc groove and fixed to the outer wall of the annular body, and a gear rotatably installed in the connecting groove and meshing with the arc rack, and the side of the gear away from the axis of the pipe pile is located in the strip groove.

[0012] By adopting the above technical solution, the staff can drive the gear to rotate by placing the rack into the strip groove, so that the arc-shaped rack and the annular body fixed to the arc-shaped rack are rotated, so that the annular body pulls the limit block through the arc-shaped rod body, so that the limit block swings toward the side away from the axis of the pile. After the connecting ring and the plug-in groove are plugged in, the annular body is reset together with the fixing block under the elastic force of the arc spring, so that the limit block is engaged with the snap-in groove to realize the positioning of the connecting ring, thereby completing the connection and fixation work between adjacent piles.

[0013] Furthermore, the limiting components and the elastic components are provided in multiple groups and are evenly distributed about the axis of the pipe pile, and the number of the limiting components is equal to the number of the clamping grooves.

[0014] By adopting the above technical solution, multiple groups of limiting components cooperate with each other and are respectively engaged with multiple engaging grooves, thereby enhancing the stability of the connection between adjacent pipe piles.

[0015] Furthermore, an abutment slope is provided at the intersection between the side of the limit block close to the pipe pile and the bottom of the limit block.

[0016] By adopting the above technical solution, when the connecting ring of the lower pipe pile is inserted into the plug-in groove of the upper pipe pile, the abutting inclined surface is acted upon by the connecting ring so that the limit block swings, and the arc-shaped rod body makes adaptive rotation, thereby eliminating the tedious operation of the staff controlling the rotation of the gear through the rack and thereby making the limit block swing toward the side away from the axis of the pipe pile, thereby speeding up the connection efficiency between adjacent pipe piles.

[0017] Furthermore, a plurality of rotating rollers are rotatably mounted on the position of the limit block close to the abutting inclined surface, the rotating rollers protrude from the abutting inclined surface, and the arrangement direction of the plurality of rotating rollers is parallel to the inclination direction of the abutting inclined surface.

[0018] By adopting the above technical solution and setting the rotating roller, the situation where the abutting inclined surface directly abuts against the connecting ring is avoided, and the friction force generated when the connecting ring causes the limit block to swing is reduced.

[0019] The present application also discloses a static pressure pile construction method of a static pressure prestressed pile pipe, comprising the following steps: S1. Use a pile driver to press the lower pipe pile into the soil to expose the connection ring, use a hoist to hoist the upper pipe pile to the top of the lower pipe pile, and align the upper pipe pile with the lower pipe pile; S2. Use a pile driver to press down the upper pipe pile, and by squeezing the connecting ring or actively rotating the gear, the limit block swings toward the side away from the axis of the pipe pile, and the spring gradually contracts to the side of the limit block away from the annular body and presses against the outer wall of the connecting ring. When the connecting ring and the plug-in groove are fully plugged in, the annular body rotates under the elastic force of the arc spring, and the limit block is re-engaged with the clamping groove through the arc rod body, completing the connection and fixation between adjacent pipe piles, ensuring the stability of adjacent pipe piles after connection, and improving the connection efficiency between pipe piles.

[0020] In summary, the present invention has the following beneficial effects: 1. In this application, after the lower pipe pile is pressed into the ground by the pile driver, the upper pipe pile is aligned with the lower pipe pile by the hoisting machine. When the connecting ring is plugged into the plug-in slot, the elastic positioning mechanism shrinks into the annular installation slot. After the connecting ring and the plug-in slot are plugged in, the elastic positioning mechanism is plugged into the plug-in slot to achieve connection and fixation between adjacent pipe piles, which changes the traditional technology of rotating the upper pipe pile to achieve connection with the lower pipe pile, reducing the construction difficulty. ; 2. In the present application, the staff can drive the gear to rotate by placing the rack into the bar-shaped groove, so that the arc-shaped rack and the annular body fixed to the arc-shaped rack are rotated, so that the annular body pulls the limit block through the arc-shaped rod body, so that the limit block swings toward the side away from the axis of the pile. After the connecting ring and the plug-in groove are plugged in, the annular body is reset together with the fixing block under the elastic force of the arc-shaped spring, so that the limit block is engaged with the snap-in groove to realize the positioning of the connecting ring, thereby completing the connection and fixing work between adjacent piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 is a schematic structural diagram of an embodiment of the present invention for highlighting an elastic positioning mechanism; Figure 3 yes Figure 2 The enlarged schematic diagram of point A in the middle; Figure 4 is a schematic structural diagram of the connection between adjacent pipe piles in an embodiment of the present invention; Figure 5 yes Figure 4 The enlarged schematic diagram of point B in the middle; Figure 6 is a schematic diagram of a structure in which adjacent pipe piles are about to be connected in an embodiment of the present invention; Figure 7 yes Figure 6 The enlarged schematic diagram of the center C; Figure 8 is a schematic structural diagram of an elastic positioning mechanism in an embodiment of the present invention; Fig. 9 It is a plan view schematically showing an embodiment of the present invention for highlighting the abutting inclined surface and the rotating roller.

[0022] In the figure: 1. pipe pile; 11. plug-in groove; 12. annular installation groove; 13. strip groove; 14. arc groove; 15. connecting groove; 2. connecting ring; 21. clamping groove; 3. elastic positioning mechanism; 31. limit assembly; 311. arc rod body; 312. limit block; 3121. rotating shaft; 3122. give way groove; 3123. abutting inclined surface; 32. elastic assembly; 321. movable block; 322. fixed block; 323. arc spring; 33. driving assembly; 331. arc rack; 332. gear; 4. annular body; 5. rotating roller. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0024] like Figure 1-9 As shown, the embodiment of the present application discloses a static pressure prestressed pile pipe, including a pipe pile 1, a connecting ring 2 with the same inner diameter as the pipe pile 1 is integrally formed at one end of the pipe pile 1, the outer diameter of the connecting ring 2 is smaller than the outer diameter of the pipe pile 1, and a plug-in groove 11 is provided at the other end of the pipe pile 1 for plugging with the connecting ring 2, an annular mounting groove 12 connected to the plug-in groove 11 is provided in the pipe pile 1, a clamping groove 21 is provided on the outer wall of the connecting ring 2, and an elastic positioning mechanism 3 is provided in the annular mounting groove 12 for clamping with the clamping groove 21 to realize connection and fixation between adjacent pipe piles 1, and the elastic positioning mechanism 3 can be retracted into the annular mounting groove 12 when the connecting ring 2 is inserted into the annular mounting groove 12.

[0025] After the lower pipe pile 1 is pressed into the ground by the pile driver, the upper pipe pile 1 is aligned with the lower pipe pile 1 by the hoisting machine. When the connecting ring 2 is plugged into the plug-in groove 11, the elastic positioning mechanism 3 shrinks into the annular installation groove 12. After the connecting ring 2 and the plug-in groove 11 are completely plugged in, the elastic positioning mechanism 3 is engaged with the clamping groove 21 to achieve connection and fixation between adjacent pipe piles 1, which changes the traditional technology of rotating the upper pipe pile 1 to achieve connection with the lower pipe pile 1, thereby reducing the construction difficulty.

[0026] The annular mounting groove 12 is provided with a circular body 4 matched with the annular mounting groove 12. The elastic positioning mechanism 3 includes a limiting assembly 31, an elastic assembly 32 and a driving assembly 33. The limiting assembly 31 includes an arc-shaped rod body 311 hinged to the inner wall of the annular body 4 and a limiting block 312 hinged to one end of the arc-shaped rod body 311 away from the inner wall of the annular body 4. The limiting block 312 is provided with a rotating shaft 3121 matched with the limiting block 312 at a position close to the edge thereof. The rotating shaft 3121 is rotatably installed in the annular mounting groove 12, and a clearance groove 3122 for the arc rod body 311 to be hinged is provided at the intersection between the side of the limit block 312 close to the inner wall of the annular body 4 and the limit block 312 away from the rotating shaft 3121. The limit block 312 is engaged with the clamping groove 21 under the action of the elastic component 32, and the driving component 33 is used to drive the elastic component 32 to contract and make the limit block 312 contract into the annular mounting groove 12.

[0027] When the connecting ring 2 is plugged into the insertion groove 11, the driving component 33 drives the elastic component 32 to contract, and causes the limit block 312 to contract into the annular mounting groove 12. When the connecting ring 2 is plugged into the insertion groove 11, the limit block 312 is reset under the action of the elastic component 32 and is engaged with the clamping groove 21, thereby realizing the connection and fixation between adjacent pipe piles 1.

[0028] The elastic component 32 includes a movable block 321 fixed on the inner wall of the annular body 4, a fixed block 322 fixed on the inner bottom wall of the annular mounting groove 12, and an arc spring 323 fixed between the fixed block 322 and the movable block 321. A strip groove 13 is provided on the outer wall of the pipe pile 1 at a position corresponding to the annular mounting groove 12, and an arc groove 14 connected to the annular mounting groove 12 and a connecting groove 15 for connecting the arc groove 14 and the strip groove 13 are provided in the pipe pile 1, and the lengths of the connecting groove 15, the strip groove 13, and the arc groove 14 are increased in sequence; the driving component 33 includes an arc rack 331 provided in the arc groove 14 and fixed to the outer wall of the annular body 4, and a gear 332 rotatably installed in the connecting groove 15 and meshing with the arc rack 331, and the side of the gear 332 away from the axis of the pipe pile 1 is located in the strip groove 13.

[0029] The staff can drive the gear 332 to rotate by placing the rack (external rack, not the structure in this application) into the strip groove 13, so that the arc-shaped rack 331 and the annular body 4 fixed to the arc-shaped rack 331 can rotate, so that the annular body 4 pulls the limit block 312 through the arc-shaped rod body 311, so that the limit block 312 swings toward the side away from the axis of the pile 1. After the connecting ring 2 and the plug-in groove 11 are completely plugged in, the annular body 4 is reset together with the fixing block 322 under the elastic force of the arc spring 323, so that the limit block 312 is engaged with the clamping groove 21 to realize the positioning of the connecting ring 2, thereby completing the connection and fixing work between adjacent piles 1.

[0030] The limiting components 31 and the elastic components 32 are provided in multiple groups and are evenly distributed about the axis of the pipe pile 1, and the number of the limiting components 31 is equal to the number of the clamping grooves 21. The multiple groups of limiting components 31 cooperate with each other and are clamped with multiple clamping grooves 21, thereby enhancing the stability of the connection between adjacent pipe piles 1.

[0031] An abutting inclined surface 3123 is provided at the intersection between the side of the limit block 312 close to the pipe pile 1 and the bottom of the limit block 312. When the connecting ring 2 of the lower pipe pile 1 is inserted into the plug-in groove 11 of the upper pipe pile 1, the abutting inclined surface 3123 is acted upon by the connecting ring 2 to make the limit block 312 swing, and the arc-shaped rod body 311 rotates adaptively, eliminating the need for the staff to control the rotation of the gear 332 through the rack, thereby making the limit block 312 swing toward the side away from the axis of the pipe pile 1, thereby speeding up the connection efficiency between adjacent pipe piles 1.

[0032] A plurality of rotating rollers 5 are rotatably mounted on the position of the limit block 312 near the abutting inclined surface 3123. The rotating rollers 5 protrude from the abutting inclined surface 3123, and the arrangement direction of the plurality of rotating rollers 5 is parallel to the inclination direction of the abutting inclined surface 3123. The arrangement of the rotating rollers 5 avoids the direct abutment between the abutting inclined surface 3123 and the connecting ring 2, and reduces the friction force generated when the connecting ring 2 causes the limit block 312 to swing.

[0033] The use principle of a static pressure prestressed pile pipe in the present embodiment is: after the lower pipe pile 1 is pressed into the ground by a pile driver, the upper pipe pile 1 is aligned with the lower pipe pile 1 by a hoisting machine, and when the connecting ring 2 is plugged into the plug-in groove 11, the elastic positioning mechanism 3 shrinks into the annular installation groove 12. After the connecting ring 2 and the plug-in groove 11 are completely plugged in, the elastic positioning mechanism 3 is plugged into the clamping groove 21 to achieve connection and fixation between adjacent pipe piles 1, which changes the traditional technology of rotating the upper pipe pile 1 to achieve connection with the lower pipe pile 1, thereby reducing the construction difficulty.

[0034] This embodiment also discloses a static pressure pile construction method of a static pressure prestressed pile pipe, comprising the following steps: S1, use a pile driver to press the lower pipe pile 1 into the soil to expose the connecting ring 2, use a hoist to hoist the upper pipe pile 1 above the lower pipe pile 1, and align the upper pipe pile 1 with the lower pipe pile 1; S2. Use a pile driver to press down the upper pipe pile 1. By squeezing the connecting ring 2 or actively rotating the gear 332, the limit block 312 swings toward the side away from the axis of the pipe pile 1. The spring gradually shrinks to the side of the limit block 312 away from the annular body 4 and presses against the outer wall of the connecting ring 2. When the connecting ring 2 and the plug-in groove 11 are fully plugged in, the annular body 4 rotates under the elastic force of the arc spring 323, and the limit block 312 is re-engaged with the clamping groove 21 through the arc rod body 311, completing the connection and fixation between adjacent pipe piles 1, ensuring the stability of adjacent pipe piles 1 after connection, and improving the connection efficiency between the pipe piles 1.

[0035] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A static pressure prestressed pile pipe, comprising a pipe pile (1), characterized in that: A connecting ring (2) having the same inner diameter as the pipe pile (1) is integrally formed at one end of the pipe pile (1); the outer diameter of the connecting ring (2) is smaller than the outer diameter of the pipe pile (1); a plug-in groove (11) plug-fitting with the connecting ring (2) is provided at the other end of the pipe pile (1); an annular mounting groove (12) communicating with the plug-in groove (11) is provided inside the pipe pile (1); a clamping groove (21) is provided on the outer wall of the connecting ring (2); an elastic positioning mechanism (3) is provided inside the annular mounting groove (12) for clamping with the clamping groove (21) to achieve connection and fixation between adjacent pipe piles (1); the elastic positioning mechanism (3) can be retracted into the annular mounting groove (12) when the connecting ring (2) is inserted into the annular mounting groove (12).

2. The static pressure prestressed pile pipe according to claim 1 is characterized in that: A circular ring body (4) cooperating with the circular ring body (12) is arranged in the circular mounting groove (12); the elastic positioning mechanism (3) comprises a limit assembly (31), an elastic assembly (32) and a driving assembly (33); the limit assembly (31) comprises an arc-shaped rod body (311) hinged to the inner wall of the circular ring body (4) and a limit block (312) hinged to one end of the arc-shaped rod body (311) away from the inner wall of the circular ring body (4); a rotating shaft (3121) cooperating with the limit block (312) is penetrated and arranged at a position close to the edge of the limit block (312). The rotating shaft (3121) is rotatably mounted in the annular mounting groove (12); a clearance groove (3122) for hinged connection of the arc-shaped rod body (311) is provided at the intersection between the side of the limiting block (312) close to the inner wall of the annular body (4) and the side of the limiting block (312) far from the rotating shaft (3121); the limiting block (312) is engaged with the engaging groove (21) under the action of the elastic component (32); the driving component (33) is used to drive the elastic component (32) to contract, and to cause the limiting block (312) to contract into the annular mounting groove (12).

3. The static pressure prestressed pile pipe according to claim 2 is characterized in that: The elastic component (32) comprises a movable block (321) fixed on the inner wall of the annular body (4), a fixed block (322) fixed on the inner bottom wall of the annular mounting groove (12), and an arc spring (323) fixed between the fixed block (322) and the movable block (321).

4. The static pressure prestressed pile pipe according to claim 3 is characterized in that: A strip groove (13) is provided at a position of the outer wall of the pipe pile (1) corresponding to the annular mounting groove (12); an arc groove (14) communicating with the annular mounting groove (12) and a connecting groove (15) for connecting the arc groove (14) and the strip groove (13) are provided inside the pipe pile (1); the lengths of the connecting groove (15), the strip groove (13) and the arc groove (14) are increased in sequence; The driving assembly (33) comprises an arc-shaped rack (331) arranged in the arc-shaped groove (14) and fixed to the outer wall of the annular body (4), and a gear (332) rotatably mounted in the connecting groove (15) and meshing with the arc-shaped rack (331), wherein the side of the gear (332) away from the axis of the pipe pile (1) is located in the strip-shaped groove (13).

5. The static pressure prestressed pile pipe according to claim 4 is characterized in that: The limiting components (31) and the elastic components (32) are both provided in multiple groups and are evenly distributed about the axis of the pipe pile (1), and the number of groups of the limiting components (31) is equal to the number of the clamping grooves (21).

6. The static pressure prestressed pile pipe according to claim 3 is characterized in that: An abutment inclined surface (3123) is provided at the intersection between the side of the limit block (312) close to the pipe pile (1) and the bottom of the limit block (312).

7. The static pressure prestressed pile pipe according to claim 6 is characterized in that: A plurality of rotating rollers (5) are rotatably mounted on the limit block (312) at a position close to the abutting inclined surface (3123); the rotating rollers (5) are arranged protruding from the abutting inclined surface (3123), and the arrangement direction of the plurality of rotating rollers (5) is parallel to the inclination direction of the abutting inclined surface (3123).

8. A static pressure pile construction method for static pressure prestressed pile pipe according to any one of claims 1 to 7, characterized in that: The steps include: S1, using a pile driver to press the lower pipe pile (1) into the soil to expose the connecting ring (2), using a hoisting machine to hoist the upper pipe pile (1) above the lower pipe pile (1), and aligning the upper pipe pile (1) with the lower pipe pile (1); S2. The upper pipe pile (1) is pressed downward by a pile driver. The limiting block (312) swings toward the side away from the axis of the pipe pile (1) by squeezing the connecting ring (2) or actively rotating the gear (332). The spring gradually contracts until the side of the limiting block (312) away from the annular body (4) is pressed against the outer wall of the connecting ring (2). When the connecting ring (2) and the plug-in groove (11) are fully plugged in, the annular body (4) rotates under the elastic force of the arc spring (323) and the limiting block (312) is re-engaged with the plug-in groove (21) through the arc rod (311). The connection and fixation between adjacent pipe piles (1) are completed, the stability of adjacent pipe piles (1) after connection is ensured, and the connection efficiency between pipe piles (1) is improved.

Images