Pile foundation waste reinforcement cage taking-out device and construction method

Abstract

The invention discloses a pile foundation waste reinforcement cage taking-out device and a construction method, and relates to the technical field of building construction equipment. The device for taking out the waste pile foundation reinforcement cage comprises a fisher, and the fisher comprises a connecting cylinder, an inserting column and a clamping claw; the connecting cylinder is fixedly mounted at one end of the inserting column, an inserting tip is arranged at the end, away from the connecting cylinder, of the inserting column, and the two clamping claws are mounted on the left side and the right side of the inserting tip respectively; the two clamping claws are positioned at the same height; the connecting cylinder is provided with a mounting inner cavity, and a connecting lock column is arranged on the side wall of the connecting cylinder. The fisher is simple in structure and reliable in function, the fisher can be conveniently inserted into the reinforcement cage and connected with the reinforcement cage in a clamped mode, and therefore the fisher is used for taking out the reinforcement cage, and the problem that treatment is difficult when the reinforcement cage in a pile hole is not installed in compliance is solved. The sharp ends of the clamping claws can be opened outwards, so that the fisher and the reinforcement cage can be clamped conveniently and stably, the problem that repeated operation is needed due to the fact that the reinforcement cage falls off due to clamping looseness is solved, working hours are reduced, and efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction equipment, and in particular to a device for removing discarded steel bar cages from a pile foundation and a construction method. Background Art

[0002] Before pouring the pile foundation concrete, the pile foundation steel cage must be lowered into the pile hole. During construction, due to the substandard quality of the steel cage itself, improper operation of the construction workers, and hole collapse, the steel cage often tilts, falls off, or is buried. It is particularly difficult to deal with problems such as tilting, falling off, or being buried after the steel cage is installed.

[0003] In traditional technology, most construction units will fill the hole with soil, and then use impact drills to directly remove the steel cage. Stones are also thrown in the process of impacting and removing the steel cage. Due to the high specific gravity of steel bars, the broken steel bar heads cannot be discharged out of the hole through mud suspension, and arrangements need to be made to absorb the steel bar heads. This treatment is costly, time-consuming, and causes great losses. Summary of the invention

[0004] In order to overcome the problem in the above-mentioned background technology that "the steel cage in the pile hole is difficult to handle when it is not installed in compliance with regulations", the present invention provides a device and a construction method for removing the discarded steel cage of a pile foundation.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: A device for removing abandoned steel cages from pile foundations, comprising a salvage device, the salvage device comprising a connecting tube, a plug-in column and a clamping claw; the connecting tube is fixedly mounted on one end of the plug-in column, the plug-in column is provided with a plug-in tip at the end away from the connecting tube, and two clamping claws are provided and are respectively mounted on the left and right sides of the plug-in tip; the two clamping claws are located at the same height; the connecting tube is provided with an installation inner cavity, and the side wall of the connecting tube is provided with a connecting lock column.

[0006] As a further optimization solution of the present invention, the clamping claw is fixedly connected to the plug-in tip; the two clamping claws are arranged in an inverted figure eight shape.

[0007] As a further optimization solution of the present invention, connecting fins are respectively provided on the left and right side walls of the plug-in tip, and the clamping claws are rotatably connected to the connecting fins via a rotating shaft.

[0008] As a further optimization solution of the present invention, a torsion spring is sleeved on the outer periphery of the rotating shaft, and two ends of the torsion spring are respectively connected to the clamping claw and the plug-in tip, so that the clamping claw has a tendency to rotate.

[0009] As a further optimization scheme of the present invention, an abutment block is fixedly installed at the lower end of the connecting fin, and the upper surface of the abutment block is provided with a limiting surface for supporting the clamping claw; the limiting surface can support the outer wall of the clamping claw on the same side close to the end of the rotating shaft.

[0010] As a further optimization solution of the present invention, the plug-in column is provided with a mounting cavity with openings on both sides, and the inner edge of the connecting fin is fixedly connected to the open side wall of the mounting cavity.

[0011] As a further optimization solution of the present invention, the two engaging claws are arranged in an inverted figure eight shape.

[0012] As a further optimization scheme of the present invention, the plug-in column is provided with a accommodating cavity with openings on both sides, and the two clamping claws are cross-arranged in an X shape in the accommodating cavity; a driving component for pushing the intersection position of the two clamping claws is provided at the top position of the accommodating cavity.

[0013] As a further optimization scheme of the present invention, a support ring is sleeved on the surface of the rotating shaft, and the two end surfaces of the support ring are respectively crimped with the inner wall of the mounting cavity and the clamping claw; one support ring is located on the front side of one clamping claw, and the other support ring is located on the rear side of the other clamping claw, so that the two clamping claws are in a front and rear shape; the clamping claw is provided with a supporting protrusion, and the supporting protrusion is provided with a first crimping surface and a second crimping surface, the first crimping surface is used to adapt to crimping the limiting surface on the opposite side thereof, and the second crimping surface is used to adapt to crimping the support ring on the opposite side thereof.

[0014] A construction method for a device for removing abandoned steel cages from a pile foundation, comprising the following steps: S1, drilling a hole using a drill having the same diameter as the pile hole to twist and compress the steel cage until the steel cage is compressed into a longer elastic body; S2, installing the salvage device on the drill rod of a rotary drill; S3, starting the rotary drill, driving the drill rod to extend downward along the pile hole, and inserting the bottom end of the plug-in column into the compressed steel cage; S4, starting the rotary drill, driving the drill rod to retract upward, and the clamping claws hook the compressed steel cage out of the pile hole.

[0015] In summary, the present invention is beneficial in that: (1) The present invention has a simple structure and reliable functions. The salvage device can be conveniently inserted into the steel cage and engaged with the steel cage, so as to be used for removing the steel cage, thereby solving the problem that the inclined steel cage in the pile hole is difficult to handle.

[0016] (2) The torsion spring can push the tip of the claw of the salvage device to open outward, so that the salvage device and the steel cage can be easily and stably connected, avoiding the problem of the steel cage falling off due to loose connection and requiring repeated operations, thus reducing working hours and improving efficiency.

[0017] (3) The driving assembly can push the tip of the clamping claw to open outward, thereby avoiding the problem that the clamping claw cannot be opened due to the messy steel bars in the steel cage, further improving the hooking hit rate and improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application is further described below with reference to the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the fixed connection structure between the clamping claw and the plug-in tip; Figure 3 It is a schematic diagram of the installation position and structure of the connecting fin; Figure 4 The installation position and structural diagram of the abutment block; Figure 5 It is the installation position and structural diagram of the limit surface; Figure 6 This is the installation position and structural diagram of the extension block; Figure 7 A schematic diagram of a structure in which two clamping claws are arranged crosswise; Figure 8 is a cross-sectional top view of the mounting structure of the clamping claw a; Fig. 9 is a cross-sectional top view of the mounting structure of the clamping claw b; Fig.10 It is a top view schematic diagram of the clamping claw a and the clamping claw b being respectively pressed against the support ring; Fig.11 It is a schematic diagram of the position of the supporting protrusion when the clamping claws are in a crossed state; Fig.12 It is a schematic diagram of the position and structure of the supporting protrusion; Fig.13 It is a schematic diagram of the crimping state of the support protrusion, the limiting surface and the support ring; Fig.14 Schematic diagram of the position and structure of the upturned tip.

[0019] Description of reference numerals: In the figure, 1. Connecting cylinder; 11. Connecting locking column; 12. Strengthening rib; 2. Plug-in column; 201. Installation cavity; 202. Accommodation cavity; 21. Plug-in tip; 22. Connecting fin; 221. Abutment block; 2211. Limiting surface; 2212. Extension block; 3. Clamping claw; 31. Supporting protrusion; 311. First crimping surface; 312. Second crimping surface; 32. Upturned tip; 4. Rotating shaft; 5. Support ring; 6. Drive components; 3a, clamping claw a; 3b, clamping claw b; 4a, rotating shaft a; 4b, rotating shaft b; 5a, support ring a; 5b, support ring b. DETAILED DESCRIPTION

[0020] Based on the above structural features of the present application, the implementation methods of the present application are further described: Embodiment 1, refer to Figure 1 , a device for removing abandoned steel cages from pile foundations, including a salvage device, which includes a connecting tube 1, a plug-in column 2 and a clamping claw 3. The connecting tube 1 is fixedly mounted on one end of the plug-in column 2 (for example, by an integrated fixed connection or by a bolt fixed connection), and the plug-in column 2 is provided with a plug-in tip 21 at one end away from the connecting tube 1, and two clamping claws 3 are provided and are respectively installed on the left and right sides of the plug-in tip 21. The two clamping claws 3 are located at the same height. The connecting tube 1 is provided with an installation inner cavity, and the side wall of the connecting tube 1 is provided with a connecting lock column 11, which is inserted into a screw hole on the side wall of the connecting tube 1 and is screwed through a thread; when in use, the connecting tube 1 is sleeved on the drill rod of the rotary drill, and then the connecting lock column 11 is rotated until the end of the connecting lock column 11 is inserted into the positioning hole of the drill rod, thereby realizing the connection between the salvage device and the drill rod.

[0021] Reference Figure 2 The top end of the plug-in column 2 is fixedly connected to the middle of the bottom plate of the connecting tube and a reinforcing rib 12 is provided at the connection position.

[0022] Embodiment 2, based on embodiment 1, in the pile foundation abandoned steel cage removal device, refer to Figure 2 The clamping claw 3 is fixedly connected to the plug-in tip 21; the two clamping claws 3 are arranged in an inverted eight-shaped shape, so that the clamping claw 3 is easy to insert into the steel cage and difficult to be pulled out from the steel cage. In this embodiment, the clamping claw 3 is fixedly connected to the plug-in tip 21 (for example, by bolts or by an integrated fixed connection), so that the salvage has a higher structural strength.

[0023] Embodiment 3, on the basis of embodiment 1, in the pile foundation abandoned steel cage removal device, refer to Figure 3 and Figure 4, the left and right side walls of the plug-in tip 21 are respectively provided with connecting fins 22 (for example, fixedly connected by bolts or fixedly connected in an integrated manner), and the clamping claw 3 is rotatably connected to the connecting fins 22 through the rotating shaft 4. The left and right side walls of the plug-in tip 21 are respectively provided with two mutually parallel connecting fins 22, and the clamping claw 3 is placed between the two connecting fins 22 on the same side, and the two ends of the rotating shaft 4 are respectively fixedly connected to the two connecting fins 22 on the same side (for example, fixedly connected by cold shrinkage, fixedly connected in an integrated manner, fixedly connected by bolts, fixedly connected by welding, etc.), so that the rotating shaft 4 is in a horizontal state. The outer periphery of the rotating shaft 4 is sleeved with a torsion spring, and the two ends of the torsion spring are respectively connected to the clamping claw 3 and the plug-in tip 21, and the torsion spring applies a rotational force to the clamping claw 3, so that the clamping claw 3 has a tendency to rotate. When the bottom end of the plug-in column 2 is inserted into the compressed steel cage, the clamping claw 3 rotates inward (under the compression of the steel cage), thereby improving the smoothness of insertion; after the bottom end of the plug-in column 2 is inserted into the compressed steel cage, the tip of the clamping claw 3 opens outward (driven by the torsion spring) (refer to Figure 4 , the left clamping claw 3 rotates counterclockwise, and the right clamping claw 3 rotates clockwise), so that the clamping claw 3 can clamp the steel cage and lift the steel cage during the upward movement of the plug-in column 2.

[0024] Reference Figure 4 and Figure 5 The lower end of the connecting fin 22 is fixedly mounted with an abutment block 221 (for example, fixedly connected by bolts or fixedly connected in an integrated manner), and the upper surface of the abutment block 221 is provided with a limiting surface 2211 for supporting the clamping claw 3; the limiting surface 2211 can support the outer wall of the end of the clamping claw 3 on the same side close to the rotating shaft 4. The clamping claw 3 opens outward until the limiting surface 2211 and the outer wall of the end of the clamping claw 3 close to the rotating shaft 4 are attached and pressed against each other, and the limiting surface 2211 is used to prevent the limiting surface 2211 from continuing to rotate, and transmit the lifting force to the steel cage through the clamping claw 3.

[0025] Reference Figure 6An extension block 2212 is provided below the abutment block 221. The top of the extension block 2212 is fixedly connected to the abutment block 221 (for example, by bolts or by an integrated fixed connection), the side wall is fixedly connected to the plug-in column 2 (for example, by bolts or by an integrated fixed connection), and the bottom is fixedly connected to the plug-in column 2 (for example, by bolts or by an integrated fixed connection). The extension block 2212 is used to connect the abutment block 221 and the plug-in column 2 to prevent the abutment block 221 from being suspended, thereby improving the bearing capacity of the abutment block 221 and further improving the structural strength of the salvage. The outer wall of the extension block 2212 is aligned with the outer wall of the plug-in column 2, and a rounded structure is provided at the connection position between the extension block 2212 and the abutment block 221. A rounded structure is provided at the lower edge of the outer wall of the abutment block 221, thereby improving the smoothness of the insertion of the salvage into the steel cage.

[0026] Reference Figure 4 and Figure 6 The plug-in column 2 is provided with a mounting cavity 201 with openings on both sides, and the inner edge of the connecting fin 22 is fixedly connected to the open side wall of the mounting cavity 201 (for example, by bolts or by an integrated fixed connection); so that the distance between the two rotating shafts 4 is as close as possible, and the clamping claw 3 has the smallest possible cross-sectional area in the convergent state, further improving the smoothness of the salvage device being inserted into the steel cage.

[0027] Reference Figure 4 and Figure 6 The two clamping claws 3 are arranged in an inverted eight-shaped shape, so that the clamping claws 3 are easy to insert into the steel cage and difficult to be pulled out from the steel cage. After the steel cage is taken out, the salvage device can be taken out by cutting the steel cage or prying the steel cage.

[0028] Embodiment 4, on the basis of embodiment 3, in the pile foundation abandoned steel cage removal device, refer to Figure 7 The plug-in column 2 is provided with a receiving cavity 202 with openings on both sides. The receiving cavity 202 is arranged above the installation cavity 201 and is connected to the installation cavity 201. The two clamping claws 3 are cross-arranged in an X shape in the receiving cavity 202; a driving component 6 for pushing the cross position of the two clamping claws 3 is provided at the top position of the receiving cavity 202. The driving component 6 pushes the cross position of the two clamping claws 3 downward so that the upper end of the clamping claws 3 extends out of the receiving hole of the plug-in column 2. Compared with the solution in Example 3 in which the clamping claws 3 are simply driven outward by the torsion spring, it has a more reliable driving form, because the compressed steel cage has staggered steel bars, and the steel bars often block the tip of the clamping claws 3, resulting in the inability to push the clamping claws 3 to open by relying solely on the torsion spring, and then it is difficult to clamp the steel cage. Refer to Figure 7, the side clamping claw 3 is the clamping claw a3a, and the left clamping claw 3 is the clamping claw b3b; under the action of the torsion spring, the clamping claw a3a has a tendency to rotate clockwise, and the clamping claw b3b has a tendency to rotate counterclockwise, so that the two clamping claws 3 can maintain a fit with the driving component 6, thereby avoiding accidental opening of the clamping claw 3 and ensuring that the clamping claw 3 can be smoothly inserted into the steel cage; when the driving component 6 extends downward, it can push the clamping claw a3a to rotate counterclockwise and the clamping claw b3b to rotate clockwise, so that the tips of the two clamping claws 3 extend from the accommodating cavity 202 and are clamped with the steel cage.

[0029] Reference Figure 8 to Figure 10 A support ring 5 is sleeved on the surface of the rotating shaft 4, and the two end surfaces of the support ring 5 are respectively pressed against the inner wall of the installation cavity 201 and the clamping claw 3; one support ring 5 is located at the front side of one clamping claw 3, and the other support ring 5 is located at the back side of the other clamping claw 3, so that the two clamping claws 3 are in a front and back shape, thereby achieving stable installation of the two clamping claws 3. Figure 7 to Figure 10 The rotating shaft 4 connected to the right-side clamping claw a3a is the rotating shaft a4a, and the supporting ring 5 sleeved on the surface of the rotating shaft a4a is the supporting ring a5a, and the supporting ring a5a is located at the rear side of the clamping claw 3; the rotating shaft 4 connected to the left-side clamping claw b3b is the rotating shaft b4b, and the supporting ring 5 sleeved on the surface of the rotating shaft b4b is the supporting ring b5b, and the supporting ring b5b is located at the front side of the clamping claw 3; the thickness of the clamping claw a3a, the thickness of the clamping claw b3b, the axial length of the supporting ring a5a, and the axial length of the supporting ring b5b are all equal, so the supporting ring a5a is supported between the clamping claw a3a and the plug-in column 2 to form a first accommodating space for accommodating the clamping claw b3b, and the supporting ring b5b is supported between the clamping claw b3b and the plug-in column 2 to form a second accommodating space for accommodating the clamping claw a3a, thereby realizing a staggered arrangement to avoid jamming.

[0030] Reference Figure 11 to Figure 13 The clamping claw 3 is provided with a supporting protrusion 31, and the supporting protrusion 31 is fixedly connected to the clamping claw 3 (for example, by an integral fixed connection or by a bolt fixed connection), and the supporting protrusion 31 is provided with a first crimping surface 311 and a second crimping surface 312, the first crimping surface 311 is used to adapt to crimping the limiting surface 2211 on the opposite side thereof, and the second crimping surface 312 is used to adapt to crimping the supporting ring 5 on the opposite side thereof. Fig.10 and Fig.13 , the supporting protrusion 31 connected to the clamping claw a3a is pressed on the supporting ring b5b and the limiting surface 2211 on the left; similarly, the supporting protrusion 31 connected to the clamping claw b3b is pressed on the supporting ring a5a and the limiting surface 2211 on the right, thereby achieving the limitation of the two clamping claws 3 and preventing the clamping claws 3 from excessively rotating and causing the clamping failure with the steel cage.

[0031] Reference Fig.12 and Fig.14The supporting protrusion 31 is arranged at the lower edge position of the clamping claw 3, and an upturned tip 32 is arranged at the tip position of the clamping claw 3. The upturned tip 32 is inclined in the direction away from the position of the supporting protrusion 31, so that after the supporting protrusion 31 is pressed onto the supporting ring 5, the upturned tip 32 can point obliquely upward, thereby improving the clamping stability of the steel cage, reducing the risk of the steel cage falling off, further avoiding repeated construction caused by the falling off of the steel cage, and improving work efficiency.

[0032] Reference Fig.14 Since the two rotating shafts 4 are of equal height, the clamping claws 3 can be in a horizontal position after being pressed onto the rotating shaft 4, and the two upward tip ends 32 have as large a distance as possible, thereby improving the clamping stability of the steel cage.

[0033] Reference Figure 7 The driving assembly 6 includes a hydraulic cylinder installed in the plug-in column 2 and two rollers installed on the output shaft of the hydraulic cylinder. The two rollers can rotate freely 360 degrees. The two rollers are arranged one in front of the other to be pressed on the arc surface of the two clamping claws 3 respectively; the hydraulic cylinder drives the roller to move downward, which can push the tip of the clamping claw 3 to open outward. The hydraulic cylinder is arranged inside the plug-in column 2 along the axial direction of the plug-in column 2. The hydraulic cylinder is connected and communicated with the external oil pump through an oil pipe. The drill rod of the rotary drill is pressed down in the form of reciprocating rotation (for example, 180 degrees clockwise, then 180 degrees counterclockwise, and so on) to avoid the oil pipe from being entangled during the rotation of the salvage device. The external oil pump is arranged outside the pile hole, and the user can control the opening and contraction of the clamping claw 3 by controlling the start and stop of the external oil pump and other working states.

[0034] Embodiment 5, regarding the construction method of the device for removing the discarded steel cage of the pile foundation in Embodiment 1, the steps include: S1, drilling a hole using a drill bit with the same diameter as the pile hole to twist and compress the steel cage until the steel cage is compressed into a longer elastic body; S2, installing the salvage device on the drill rod of the rotary drill; S3, starting the rotary drill, driving the drill rod to extend downward along the pile hole, and inserting the bottom end of the plug-in column 2 into the compressed steel cage; S4, starting the rotary drill, driving the drill rod to retract upward, and the clamping claw 3 hooks the compressed steel cage out of the pile hole.

[0035] Embodiment 6, regarding the construction method of the device for removing the discarded steel cage of the pile foundation in Embodiment 2, the steps include: S1, drilling a hole using a drill bit with the same diameter as the pile hole to twist and compress the steel cage until the steel cage is compressed into a longer elastic body; S2, installing the salvage device on the drill rod of the rotary drill; S3, starting the rotary drill, driving the drill rod to extend downward along the pile hole, and inserting the bottom end of the plug-in column 2 into the compressed steel cage; during the insertion process of the bottom end of the plug-in column 2, the clamping claw 3 applies an expansion force to the steel cage; after the clamping claw 3 is inserted, the steel bars in the steel cage rebound, causing the plug-in hole formed by the plug-in column 2 to shrink, thereby achieving the clamping connection between the clamping claw 3 and the steel cage; S4, starting the rotary drill, driving the drill rod to retract upward, and the clamping claw 3 hooks the compressed steel cage out of the pile hole.

[0036] Embodiment 7, regarding the construction method of the device for removing the discarded steel cage of the pile foundation in Embodiment 3, the steps include: S1, drilling a hole using a drill bit with the same diameter as the pile hole to twist and compress the steel cage until the steel cage is compressed into a longer elastic body; S2, installing the salvage device on the drill rod of the rotary drill; S3, starting the rotary drill, driving the drill rod to extend downward along the pile hole, and inserting the bottom end of the plug-in column 2 into the compressed steel cage; after the clamping claw 3 is inserted, the torsion spring drives the tip of the clamping claw 3 to open outward, so as to realize the clamping connection between the clamping claw 3 and the steel cage; S4, starting the rotary drill, driving the drill rod to retract upward, and the clamping claw 3 hooks the compressed steel cage out of the pile hole.

[0037] Embodiment 8, regarding the construction method of the pile foundation abandoned steel cage removal device in Embodiment 4, the steps include: S1, using a drill bit with the same diameter as the pile hole to drill a hole to twist and compress the steel cage until the steel cage is compressed into a longer elastic body; S2, installing the salvage device on the drill rod of the rotary drill; S3, starting the rotary drill, driving the drill rod to extend downward along the pile hole, and inserting the bottom end of the plug-in column 2 into the compressed steel cage; after the clamping claw 3 is inserted, the driving component 6 pushes the tip of the clamping claw 3 to open outward to achieve the clamping connection between the clamping claw 3 and the steel cage; after being hooked up, under the weight of the steel cage, the clamping claw 3 has a tendency to continue to rotate outward, until the support protrusion 31 is pressed on the limit surface 2211 and the support ring 5, the clamping claw 3 stops rotating to avoid excessive flipping of the clamping claw 3, and ensure that the salvage device and the steel cage will not be disengaged; S4, starting the rotary drill, driving the drill rod to retract upward, and the clamping claw 3 hooks the compressed steel cage out of the pile hole.

[0038] The present invention has a simple structure and reliable functions. The salvage device can be conveniently inserted into the steel cage and clamped with the steel cage, so as to be used for the removal of the steel cage, solving the problem that the steel cage in the pile hole is difficult to handle when it is not installed in compliance with regulations. The torsion spring can push the tip of the clamping claw 3 of the salvage device to open outward, so that the salvage device and the steel cage can be conveniently and stably clamped, avoiding the problem of the steel cage falling off due to loose clamping, which requires repeated operations, reducing working hours and improving efficiency. The driving component 6 can push the tip of the clamping claw 3 to open outward, so as to avoid the problem that the clamping claw 3 cannot be opened due to the messy steel bars in the steel cage, further improving the hooking hit rate and improving construction efficiency.

[0039] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0040] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] To sum up, for those skilled in the art, according to the guidance of the present invention, without departing from the principles and spirit of the present invention, the changes, modifications, substitutions and deformations made to the present invention still fall within the protection scope of the present invention.

Claims

1. A device for removing abandoned steel cages from pile foundations. Features: It comprises a salvage device, the salvage device comprising a connecting tube (1), a plug-in column (2) and a clamping claw (3); The connecting cylinder (1) is fixedly mounted on one end of the plug-in column (2); an end of the plug-in column (2) away from the connecting cylinder (1) is provided with a plug-in tip (21); two clamping claws (3) are provided and are respectively mounted on the left and right sides of the plug-in tip (21); the two clamping claws (3) are located at the same height; The connecting tube (1) is provided with a mounting inner cavity, and the side wall of the connecting tube (1) is provided with a connecting locking column (11).

2. The device for removing abandoned steel cages from pile foundations according to claim 1, Features: The clamping claws (3) are fixedly connected to the plug-in tip (21); the two clamping claws (3) are arranged in an inverted figure eight shape.

3. The device for removing abandoned steel cages from pile foundations according to claim 1, Features: Connecting fins (22) are respectively provided on the left and right side walls of the plug-in tip (21), and the clamping claw (3) is rotatably connected to the connecting fins (22) via a rotating shaft (4).

4. The device for removing abandoned steel cages from pile foundations according to claim 3, Features: A torsion spring is sleeved on the outer circumference of the rotating shaft (4), and two ends of the torsion spring are respectively connected to the clamping claw (3) and the plug-in tip (21), so that the clamping claw (3) has a tendency to rotate.

5. The device for removing abandoned steel cages from pile foundations according to claim 4, Features: An abutment block (221) is fixedly mounted on the lower end of the connecting fin (22), and a limiting surface (2211) for supporting the clamping claw (3) is provided on the upper surface of the abutment block (221); the limiting surface (2211) is capable of supporting the outer side wall of one end of the clamping claw (3) on the same side thereof close to the rotating shaft (4).

6. The device for removing abandoned steel cages from pile foundations according to claim 5, Features: The plug-in column (2) is provided with a mounting cavity (201) with openings on both sides, and the inner edge of the connecting fin (22) is fixedly connected to the open side wall of the mounting cavity (201).

7. The device for removing the discarded steel cage of pile foundation according to claim 6, Features: The two clamping claws (3) are arranged in an inverted figure eight shape.

8. The device for removing abandoned steel cages from pile foundations according to claim 6, Features: The plug-in column (2) is provided with a receiving cavity (202) with openings on both sides, and the two clamping claws (3) are arranged crosswise in an X shape in the receiving cavity (202); a driving component (6) for pushing the two clamping claws (3) to the cross position is provided at the top position of the receiving cavity (202).

9. The device for removing abandoned steel cages from pile foundations according to claim 8, Features: A support ring (5) is sleeved on the surface of the rotating shaft (4), and the two end surfaces of the support ring (5) are respectively crimped with the inner wall of the installation cavity (201) and the clamping claw (3); one of the support rings (5) is located at the front side of one of the clamping claws (3), and the other of the support rings (5) is located at the rear side of the other of the clamping claws (3), so that the two clamping claws (3) are in a front-and-rear shape; the clamping claw (3) is provided with a support protrusion (31), and the support protrusion (31) is provided with a first crimping surface (311) and a second crimping surface (312), the first crimping surface (311) is used for adapting and crimping with the limiting surface (2211) on the opposite side thereof, and the second crimping surface (312) is used for adapting and crimping with the support ring (5) on the opposite side thereof.

10. A construction method of the pile foundation discarded steel cage removal device according to any one of claims 1 to 9, It is characterized in that the steps include: S1. Drill a hole with a drilling tool of the same diameter as the pile hole to twist and compress the steel cage until the steel cage is compressed into a longer elastic body; S2, installing the salvage device on the drill pipe of the rotary drilling drill; S3, starting the rotary drill, driving the drill rod to extend downward along the pile hole, and inserting the bottom end of the plug-in column (2) into the compressed steel cage; S4, starting the rotary drill, driving the drill rod to retract upward, and the clamping claw (3) hooks the compressed steel cage out of the pile hole.

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