A construction method for treating pile hole collapse after installation of cast-in-place pile reinforcement cage

Abstract

The present invention discloses a construction method for treating pile hole collapse after installation of a cast-in-place pile reinforcement cage, which relates to the technical field of pile hole construction. A percussion drill is used to press down and destroy the reinforcement cage, disintegrating the reinforcement cage to obtain a main body of reinforcement cage residue and reinforcement cage debris. A barrel drill is then used to remove the main body of reinforcement cage residue and a slag removal barrel is used to remove the reinforcement cage debris, thereby removing the reinforcement cage in the collapsed pile hole. The barrel drill includes a first drill barrel and a second drill barrel that rotate in opposite directions, so that a first lasso mounted on the first drill barrel and a second lasso mounted on the second drill barrel are wound around the middle and upper parts of the reinforcement cage residue in opposite directions. When the barrel drill is pulled out, the main body of reinforcement cage residue is hoisted and removed, resulting in a high construction success rate and avoiding the problem of low efficiency caused by repeated construction.

Description

Technical Field

[0001] The invention relates to the technical field of pile hole construction, and in particular to a construction method for processing pile hole collapse after installation of a cast-in-place pile reinforcement cage. Background Art

[0002] During the pile foundation construction process, steel casing is used as the wall protection, and the steel casing is pressed down until the pulling machine can no longer press down.

[0003] During the actual operation process, some construction sites are close to the river bank; during the pile hole construction process, the installation of the steel cage will disturb the pile hole, causing water erosion and damage to the structure of the bottom of the casing, causing the pile hole to collapse; after the pile hole collapses, the steel cage in the pile hole can neither be further installed nor pulled out, causing difficulties for subsequent construction. Summary of the Invention

[0004] In order to overcome the problem in the above background technology that "it is difficult to remove the reinforcement cage after the pile hole collapses", the present invention provides a construction method for treating the pile hole collapse after the reinforcement cage of the cast-in-place pile is installed.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A construction method for treating pile hole collapse after installation of a cast-in-place pile reinforcement cage comprises the following steps: S1, leveling and compacting the collapsed hole ground, removing soil around a casing, and reserving a connection length for the casing; S2, extending the casing by using a puller to press the casing down to the bearing layer; S3, backfilling and compacting the soil around the pile hole, with the casing protruding 400 mm to 600 mm above the repaired ground surface; and S4, destroying and removing the reinforcement cage in the pile hole.

[0007] Among them, step S4 further includes the following steps: S41, using a rotary drilling rig and a barrel drill to press down and twist the steel cage to compress the steel cage; S42, using an impact drill to press down and destroy the steel cage to disintegrate the steel cage to obtain the steel cage residue body and steel cage debris; S43, using a rotary drilling rig and a barrel drill to pull out the steel cage residue body; S43, using a rotary drilling rig and a slag removal barrel to remove the steel cage debris.

[0008] As a further optimization solution of the present invention, the barrel drill includes a first drill barrel, the outer wall of the bottom of the first drill barrel is provided with a rotary screw thread for excavation, and the bottom edge of the first drill barrel is provided with rotary excavation teeth for loosening the soil.

[0009] As a further optimization scheme of the present invention, the inner cavity of the first drill barrel is provided with a first lasso for winding around the middle part of the steel cage residue body; the barrel drill also includes a second drill barrel; the bottom edge position of the second drill barrel is provided with a second lasso for winding around the upper part of the steel cage residue body; the first drill barrel can rotate and wind the first lasso around the steel cage residue body; the second drill barrel can be inserted into the first drill barrel and rotated in the opposite direction to wind the second lasso around the steel cage residue body in a rotation direction opposite to that of the first lasso.

[0010] As a further optimization solution of the present invention, two first lassoes are provided and arranged in a two-shaped shape, and the two first lassoes are arranged along the radial direction of the first drill barrel; two second lassoes are provided and arranged in a two-shaped shape, and the two second lassoes are arranged along the radial direction of the second drill barrel.

[0011] As a further optimization solution of the present invention, both ends of the first lasso are arranged at the bottom of the first drill barrel instead of the bottom end; and the second lasso is arranged at the bottom end of the second drill barrel.

[0012] As a further optimization scheme of the present invention, the second drill barrel includes a barrel and several adjustment barrels, the adjustment barrels are arranged in a straight line and are detachably installed at the end of the barrel away from the second lasso; the second lasso is arranged at the bottom end of the barrel; the adjustment barrels are detachably connected to each other.

[0013] As a further optimization solution of the present invention, the distance between two of the first lassoes is greater than the distance between two of the second lassoes.

[0014] As a further optimization scheme of the present invention, step S43 further includes the following steps: S431, installing the first drill barrel on the rotary drilling rig, starting the rotary drilling rig and rotating the first drill barrel counterclockwise along the pile hole, until the first drill barrel is sleeved on the outer periphery of the steel cage residue body and the first lasso is wound around the middle of the steel cage residue body in a counterclockwise direction; S432, releasing the connection between the first drill barrel and the rotary drilling rig, locking and fixing the first drill barrel on the ground around the pile hole; S433, assembling the barrel body and the adjusting barrel of the second drill barrel, and then installing the adjusting barrel on the rotary drilling rig, starting the rotary drilling rig and rotating the second drill barrel along the outer periphery of the steel cage residue body. The inner cavity rotates clockwise downward until the second lasso is wrapped around the upper part of the steel cage residue body in a clockwise direction; S434, release the connection between the adjusting cylinder and the rotary drilling rig; remove part of the adjusting cylinder to make the remaining height of the second drill cylinder fit the top edge of the first drill cylinder; S435, install the extension cylinder at the top edge of the first drill cylinder, and use the second bolt to fix the extension cylinder, the first drill cylinder and the adjusting cylinder in connection; S436, connect the top end of the extension cylinder to the rotary drilling rig, release the lock between the first drill cylinder and the ground around the pile hole, start the rotary drilling rig and rotate the first drill cylinder, the second drill cylinder and the extension cylinder clockwise upward and lift out the steel cage residue body.

[0015] As a further optimization solution of the present invention, step S432 further includes the following steps: S4321, releasing the connection between the first drill barrel and the rotary drilling rig; S4322, driving the rotary drilling rig to leave the periphery of the pile hole;

[0016] S4323. Sleeve the support plate on the outer surface of the first drill tube, and use the first bolt to fix the support plate and the first drill tube; S4324. Drive the rotary drilling rig and press it onto the support part of the support plate.

[0017] As a further optimization scheme of the present invention, the support plate is provided with a socket hole adapted for the first drill barrel, a convex ring is provided on the upper surface of the support plate at the position of the socket hole, a first screw hole for screwing the first bolt is opened on the side wall of the convex ring, and a first clamping hole for clamping the first bolt is provided on the side wall of the first drill barrel.

[0018] In summary, the present invention is beneficial in that:

[0019] The present invention has a simple structure and reliable function. A percussion drill is used to press down and destroy the steel cage, disintegrating the steel cage to obtain a main body of steel cage residue and steel cage debris. A barrel drill is then used to remove the main body of the steel cage residue, and a slag removal barrel is used to remove the steel cage debris, thereby removing the steel cage from the collapsed pile hole. The barrel drill includes a first drill barrel and a second drill barrel that rotate in opposite directions, so that a first lasso mounted on the first drill barrel and a second lasso mounted on the second drill barrel are wound around the middle and upper portions of the main body of the steel cage residue in opposite directions. When the barrel drill is pulled out, the main body of the steel cage residue is hoisted and removed, resulting in a high construction success rate and avoiding the problem of repeated construction leading to low efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present application is further described below with reference to the accompanying drawings:

[0021] Figure 1 Schematic diagram of the first drill barrel structure;

[0022] Figure 2 This is a schematic diagram of the vertical cross-section of the first drill barrel from the front;

[0023] Figure 3 This is a schematic diagram of the cross-sectional top view of the first drill barrel;

[0024] Figure 4 This is a schematic diagram of the front view of the second drill barrel;

[0025] Figure 5 This is a schematic diagram of the installation structure of the first drill tube, the second drill tube and the support plate;

[0026] Figure 6 This is a schematic diagram of the cross-sectional top view of the second drill barrel;

[0027] Figure 7 A schematic diagram of the installation positions of the first bolt and the second bolt;

[0028] Figure 8 This is a schematic diagram of the installation structure of the first drill tube, the adjustment tube, the extension tube and the second bolt;

[0029] Figure 9 Schematic diagram of the claw and limiting bead structure.

[0030] Description of reference numerals:

[0031] In the figure,

[0032] 1. First drill barrel; 11. Spinning thread; 12. Rotary digging tooth; 13. First lasso; 14. Support plate; 141. Insertion hole; 142. Raised ring; 1421. First bolt; 143. Support portion;

[0033] 2. Second drill tube; 21. Drill body; 22. Second lasso; 23. Adjustment tube;

[0034] 3. Extension tube; 31. Second bolt;

[0035] 4. Clamping claws;

[0036] 5. Limiting beads. DETAILED DESCRIPTION

[0037] Based on the above structural features of the present application, the implementation methods of the present application are further described:

[0038] The present embodiment provides a construction method for treating pile hole collapse after the installation of a cast-in-place pile reinforcement cage, the steps comprising: S1, using compaction equipment to level and compact the collapsed hole ground, removing the soil around the casing, and reserving the connection length of the casing; S2, extending the casing, and using a puller to press the casing down to the bearing layer; S3, backfilling and compacting the soil around the pile hole, with the casing 400 mm to 600 mm higher than the repaired ground, and re-measuring the hole mouth position and elevation; S4, destroying and removing the reinforcement cage in the pile hole.

[0039] Step S4 further includes: S41, using a rotary drilling rig in conjunction with a barrel drill to press down and twist the steel cage, destroying the skeleton structure of the steel cage, and compressing the steel cage into a "twisted" shape; S42, using an impact drill to press down and integrally destroy the steel cage, disintegrate the steel cage, and obtain the steel cage residue body and steel cage debris; S43, using a rotary drilling rig in conjunction with a barrel drill to pull the steel cage residue body out of the pile hole; S43, using a rotary drilling rig in conjunction with a slag removal barrel to remove the steel cage debris.

[0040] Reference Figure 1 and Figure 2 The barrel drill includes a first drill barrel 1. The bottom outer wall of the first drill barrel 1 is provided with a rotary screw thread 11 for excavation (e.g., welded or integrally fixed). The bottom edge of the first drill barrel 1 is provided with rotary cutting teeth 12 for loosening the soil (e.g., welded or integrally fixed). As the barrel drill rotates, the rotary cutting teeth 12 cut into the soil, and the first drill barrel 1 presses down and fills the cut gap, thereby enabling screwing.

[0041] Reference Figure 2 and Figure 3 A first lasso 13 is provided within the first drill tube 1 for wrapping around the middle portion of the rebar cage residue. Both ends of the first lasso 13 are connected to the inner wall of the first drill tube 1. A lifting ring is fixedly connected to the inner wall of the first drill tube 1 (e.g., by welding or integral connection). The end of the first lasso 13 is inserted into the lifting ring and locked via an anchor.

[0042] Reference Figure 4 and Figure 5The barrel drill also includes a second drill barrel 2; a second lasso 22 for winding around the upper part of the steel cage residue body is provided at the edge of the bottom end of the second drill barrel 2.

[0043] Reference Figures 2 to 6 Two first ropes 13 are provided and arranged in a "T" shape, and both first ropes 13 are arranged along the radial direction of the first drill pipe 1; two second ropes 22 are provided and arranged in a "T" shape, and both second ropes 22 are arranged along the radial direction of the second drill pipe 2. The spacing H1 between the two first ropes 13 is greater than the spacing H2 between the two second ropes 22, so that the first ropes 13 can be wound around the middle of the steel cage residue body, and the second second ropes 22 can be wound around the upper part of the steel cage residue body.

[0044] Reference Figure 5 The first drill tube 1 can rotate and wrap the first lasso 13 around the main body of the steel cage residue; the second drill tube 2 can be inserted into the first drill tube 1 and rotated in the opposite direction, and the second lasso 22 can be wrapped around the main body of the steel cage residue in a rotation direction opposite to that of the first lasso 13. Then, the first lasso 13 and the second lasso 22 can realize the fixed lifting of the main body of the steel cage residue and prevent the main body of the steel cage residue from rotating and being detached from the first lasso 13 and the second lasso.

[0045] Ginseng Figure 2 、 Figure 4 and Figure 5 The first lasso 13 has both ends disposed at the bottom of the first drill tube 1, rather than at the bottom end. The bottom of the first drill tube 1 typically reaches the bottom of the rebar cage residue. Therefore, the first lasso 13 can be wrapped around the middle of the rebar cage residue, rather than the bottom end. As the first lasso 13 moves upward, it applies a pulling force, rather than a pushing force, to the rebar cage residue. This provides greater stability and reduces the risk of the rebar cage residue tilting during the lifting process, leading to accidental detachment from the first sling. The second lasso 22 is disposed at the bottom end of the second drill tube 2, allowing the second lasso 22 to contact and wrap around the rebar cage residue as soon as possible during the descent of the second drill tube 2.

[0046] Ginseng Figure 2 、 Figure 4 and Figure 5 In the natural state, the first lasso 13 and the second lasso 22 are both in a relaxed state, thereby reserving sufficient length for winding around the main body of the steel cage residue.

[0047] Reference Figure 4The second drill barrel 2 includes a barrel 21 and several adjusting barrels 23. The adjusting barrels 23 are arranged in a straight line and are detachably mounted on the end of the barrel 21 away from the second lasso 22. The adjusting barrels 23 are detachably connected to the barrel 21 by bolts; the second lasso 22 is arranged at the bottom end of the barrel 21; the adjusting barrels 23 are detachably connected to each other, and the adjusting barrels 23 are detachably connected to each other by bolts); the top side walls of the barrel 21 and the top side walls of the adjusting barrels 23 are provided with countersunk hole structures for accommodating bolts to avoid the problem that the stud of the bolt is stuck in the gap between the second drill barrel 2 and the first drill barrel 1, causing the second drill barrel 2 to be unable to rotate.

[0048] Step S43 further includes the following steps:

[0049] S431. Install the first drill tube 1 on the rotary drilling rig (for example, sleeve the first drill tube 1 onto the drill rod, then screw in a connecting lock column threadedly connected to the side wall of the first drill tube 1 until the connecting lock column is inserted into an adapter hole on the drill rod and tightened to complete the installation). Start the rotary drilling rig and rotate the first drill tube 1 counterclockwise downward along the pile hole until the first drill tube 1 is sleeved on the outer periphery of the steel cage residue body and the first lasso 13 is wrapped around the middle of the steel cage residue body in a counterclockwise direction. When the first lasso 13 is wrapped around the steel cage residue body and is in a taut state, stop rotating the first drill tube 1.

[0050] S432, releasing the connection between the first drill tube 1 and the rotary drilling rig (for example, unscrewing the connection lock column), and locking and fixing the first drill tube 1 on the ground around the pile hole;

[0051] S433. Assemble the barrel 21 and the adjusting barrel 23 of the second drill barrel 2 using bolts, and then install the adjusting barrel 23 on the rotary drilling rig (for example, sleeve the adjusting barrel 23 onto the drill rod, then screw on the connecting locking column on the side wall of the adjusting barrel 23 which is connected by a thread, insert the connecting locking column into the adapter hole on the drill rod and tighten it to complete the installation). Start the rotary drilling rig and rotate the second drill barrel 2 clockwise downward along the inner cavity of the first drill barrel 1 until the second lasso 22 is wound around the upper part of the steel cage residue body in a clockwise direction. When the second lasso 22 is wound around the steel cage residue body and is in a taut state, stop rotating the second drill barrel 2.

[0052] S433. Release the connection between the adjustment cylinder 23 and the rotary drilling rig (e.g., unscrew the connection lock column); partially remove the adjustment cylinder 23 so that the remaining height of the second drill cylinder 2 matches the top edge of the first drill cylinder 1. That is, the top of the adjustment cylinder 23 that has not been removed and is located highest on the second drill cylinder 2 is slightly higher than the top of the first drill cylinder 1, thereby avoiding the problem that the second drill cylinder 2 is too long and the drill rod cannot be inserted into the extension cylinder 3 later.

[0053] S434: Install the extension tube 3 at the top edge of the first drill tube 1, and use the second bolt 31 to securely connect the extension tube 3, the first drill tube 1, and the adjustment tube 23;

[0054] S435. Connect the top of the extension tube 3 to the rotary drilling rig (for example, put the extension tube 3 on the drill pipe, then screw the connecting lock column on the side wall of the extension tube 3 which is connected by a thread, insert the connecting lock column into the adapter hole on the drill pipe and tighten it to complete the installation), release the lock between the first drill tube 1 and the ground around the pile hole, start the rotary drilling rig and rotate the first drill tube 1, the second drill tube 2 and the extension tube 3 clockwise upward and lift out the main body of the steel cage residue.

[0055] Step S432 further includes the following steps: S4321, releasing the connection between the first drill barrel 1 and the rotary drilling rig;

[0056] S4322, the rotary drilling rig moves to leave the periphery of the pile hole; S4323, the support plate 14 is mounted on the outer surface of the first drill tube 1, and the support plate 14 is fixedly connected to the first drill tube 1 using the first bolt 1421; S4324, the rotary drilling rig moves and is pressed onto the support portion 143 of the support plate 14.

[0057] Reference Figure 5 The support plate 14 is provided with a plugging hole 141 adapted to the first drill tube 1, and a convex ring 142 is provided on the upper surface of the support plate 14 at the position of the plugging hole 141. The convex ring 142 is fixedly connected to the support plate 14 through an integral body, and a first screw hole for screwing a first bolt 1421 is opened on the side wall of the convex ring 142. There are several first screw holes and they are arranged in a circular array at equal intervals along the side wall of the convex ring 142. The side wall of the first drill tube 1 is provided with a first clamping hole for clamping the first bolt 1421; the number of first screw holes is not less than 12, and the first clamping holes are arranged in a circular array at equal intervals along the side wall of the first drill tube 1. Each circle of first clamping holes is a group of first clamping hole groups. The number of first clamping holes in each circle is equal to the number of first screw holes. There are several first clamping hole groups and they are arranged at equal intervals along the axial direction of the first drill tube 1. During the operation of the present invention, the first drill tube 1 is first fixedly inserted into the soil layer. Therefore, the support plate 14 is sleeved on the side wall of the first drill tube 1 and rotated, so that the first screw hole can be selectively aligned with the first clamping hole in a first clamping hole group (if necessary, the soil around the pile hole can be thickened or removed to adjust the height of the support plate 14). Then, the first bolt 1421 is screwed into the first screw hole and inserted into the first clamping hole.

[0058] Reference Figure 7 and Figure 8The top of the side wall of the first drill tube 1 is provided with a base hole, which is located above the first clamping hole. The base holes are arranged in a circular array along the side wall of the first drill tube 1 at equal intervals, and the number of base holes is not less than 36. The bottom end of the extension tube 3 can be sleeved on the top of the first drill tube 1, and the side wall of the bottom end of the extension tube 3 is provided with a second screw hole. The second screw holes are arranged in a circular array along the extension tube 3 at equal intervals and are adapted one by one with the base holes. By increasing the wall thickness of the side wall of the bottom end of the extension tube 3 (for example, extending the wall thickness outward by 3 cm), the length of the second screw hole can be increased, thereby improving the connection stability. The side wall of the adjustment tube 23 is provided with a second clamping hole. The second clamping holes are arranged in a circular array along the side wall of the adjustment tube 23 at equal intervals. Each circle of second clamping holes constitutes a second clamping hole group. The number of second clamping holes in each circle is equal to the number of first screw holes. There are a plurality of second clamping hole groups and they are arranged at equal intervals along the axial direction of the adjustment tube 23. Since soil is inevitably present in the bottom end of the first drill barrel 1, the soil can exert a supporting force on the second drill barrel 2. Therefore, the rotary drilling rig can control the second drill barrel 2 to align the second clamping holes in a certain second clamping hole group with the base holes while wrapping the second lasso 22 around the main body of the steel cage residue. Then, the extension barrel 3 is installed and rotated to align the second clamping holes, base holes and second screw holes one by one. Then, the second bolt 31 is screwed into the second screw hole and the end of the second bolt 31 is inserted into the second clamping hole and the base hole to achieve a fixed connection between the first drill barrel 1, the second drill barrel 2 and the extension barrel 3.

[0059] In the present invention, since the steel cage residue body is obtained after the steel cage is torsionally damaged, there will be raised steel bar segments on the surface of the steel cage residue body due to the broken steel bars, and the first lasso 13 and the second lasso 22 can be wrapped around the steel cage residue body with the help of the steel bar segments.

[0060] Reference Figure 9 The first lasso 13 and the second lasso 22 are respectively fixedly mounted with claws 4, which are used to clamp the steel bar segment, thereby improving the connection force between the first lasso 13 and the second lasso 22 and the steel cage residue body, and improving the success rate of lifting the steel cage residue body.

[0061] Reference Figure 9 The surfaces of the first lasso 13 and the second lasso 22 are respectively provided with limiting beads 5, which are used to limit the claws 4 and at the same time enable the first lasso 13 and the second lasso 22 to maintain a certain bending ability.

[0062] Reference Figure 5 The support plate 14 is a flat plate structure, and the support portion 143 is provided on the upper surface of the support plate 14; during step S4324, the running parts (such as wheels and tracks) of the rotary drilling rig are pressed onto the support portion 143, and the weight of the rotary drilling rig is used to prevent the first drill tube 1 from rotating when the second drill tube 2 is rotated downward.

[0063] Reference Figure 7 In step S435 , the first bolt 1421 is removed to release the lock between the first drill tube 1 and the support plate 14 , thereby releasing the lock between the first drill tube 1 and the ground surrounding the pile hole.

[0064] The present invention has a simple structure and reliable function. A percussion drill is used to press down and destroy the steel cage, disintegrating the steel cage to obtain a main body of steel cage residue and steel cage debris. A barrel drill is then used to remove the main body of the steel cage residue and a slag removal barrel is used to remove the steel cage debris, thereby removing the steel cage from the collapsed pile hole. The barrel drill includes a first drill barrel 1 and a second drill barrel 2 that rotate in opposite directions, so that a first lasso 13 mounted on the first drill barrel 1 and a second lasso 22 mounted on the second drill barrel 2 are wound around the middle and upper portions of the main body of the steel cage residue in opposite directions. When the barrel drill is pulled out, the main body of the steel cage residue is hoisted and removed, resulting in a high construction success rate and avoiding the problem of repeated construction leading to low efficiency.

[0065] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0066] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed or detachable connections, or integral connections; mechanical or electrical connections; direct connections or connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0067] 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, changes, modifications, replacements and deformations made to the present invention still fall within the scope of protection of the present invention.

Claims

1. A construction method for treating pile hole collapse after installation of cast-in-place pile reinforcement cage, characterized in that the steps include: S1. Level and compact the collapsed ground, remove the soil around the casing, and reserve the connection length of the casing; S2. Extend the casing and use a puller to press the casing down to the bearing layer; S3. Backfill and compact the soil around the pile hole, with the casing 400 mm to 600 mm higher than the repaired ground; S4. Destroy and remove the steel cage in the pile hole; Step S4 further includes the following steps: S41, using a rotary drilling rig in conjunction with a barrel drill to press down and twist the steel cage to compress the steel cage; S42, using an impact drill to press down and destroy the steel cage to disintegrate the steel cage to obtain a steel cage residue body and steel cage debris; S43, using a rotary drilling rig in conjunction with a barrel drill to pull out the steel cage residue body; S43, using a rotary drilling rig in conjunction with a slag removal barrel to remove the steel cage debris; The barrel drill comprises a first drill barrel (1), the outer wall of the bottom of the first drill barrel (1) is provided with a rotary screw thread (11) for excavation, and the bottom edge of the first drill barrel (1) is provided with a rotary excavation tooth (12) for loosening soil; the inner cavity of the first drill barrel (1) is provided with a first lasso (13) for winding around the middle part of the steel cage residue body; the barrel drill also comprises a second drill barrel (2); the bottom edge of the second drill barrel (2) is provided with a second lasso (22) for winding around the upper part of the steel cage residue body; the first drill barrel (1) can rotate and wind the first lasso (13) around the steel cage residue body; the second drill barrel (2) can be inserted into the first drill barrel (1) and rotated in the opposite direction, winding the second lasso (22) around the steel cage residue body in a rotation direction opposite to that of the first lasso (13); Step S43 further The method comprises the following steps: S431, installing the first drill tube (1) on the rotary drilling rig, starting the rotary drilling rig and rotating the first drill tube (1) counterclockwise downward along the pile hole until the first drill tube (1) is sleeved on the outer periphery of the steel cage residue body and the first lasso (13) is wound around the middle of the steel cage residue body in a counterclockwise direction; S432, releasing the connection between the first drill tube (1) and the rotary drilling rig, locking and fixing the first drill tube (1) on the ground around the pile hole; S433, assembling the barrel (21) and the adjustment barrel (23) of the second drill tube (2), and then installing the adjustment barrel (23) on the rotary drilling rig, starting the rotary drilling rig and rotating the second drill tube (2) clockwise downward along the inner cavity of the first drill tube (1) until the second lasso (22) Wrap it around the upper part of the steel cage residue body in a clockwise direction; S434, release the connection between the adjustment tube (23) and the rotary drilling rig; remove part of the adjustment tube (23) so that the remaining height of the second drill tube (2) is adapted to the top edge of the first drill tube (1); S435, install the extension tube (3) at the top edge of the first drill tube (1), and use the second bolt (31) to fix the extension tube (3), the first drill tube (1) and the adjustment tube (23); S436, connect the top of the extension tube (3) to the rotary drilling rig, release the lock between the first drill tube (1) and the ground around the pile hole, start the rotary drilling rig and rotate the first drill tube (1), the second drill tube (2) and the extension tube (3) clockwise upward to lift out the steel cage residue body.

2. The construction method for treating pile hole collapse after installation of cast-in-place pile reinforcement cage according to claim 1, characterized in that: Two first lassoes (13) are provided and arranged in a U-shape, and the two first lassoes (13) are both arranged along the radial direction of the first drill tube (1); two second lassoes (22) are provided and arranged in a U-shape, and the two second lassoes (22) are both arranged along the radial direction of the second drill tube (2).

3. The construction method for treating pile hole collapse after installation of cast-in-place pile reinforcement cage according to claim 2, characterized in that: Both ends of the first lasso (13) are arranged at the bottom of the first drill tube (1) rather than at the bottom end; and the second lasso (22) is arranged at the bottom end of the second drill tube (2).

4. The construction method for treating pile hole collapse after installation of cast-in-place pile reinforcement cage according to claim 3, characterized in that: The second drill tube (2) comprises a barrel (21) and a plurality of adjustment barrels (23). The adjustment barrels (23) are arranged in a straight line and are detachably mounted on an end of the barrel (21) away from the second lasso (22). The second lasso (22) is arranged at the bottom end of the barrel (21). The adjustment barrels (23) are detachably connected to each other.

5. The construction method for treating pile hole collapse after installation of cast-in-place pile reinforcement cage according to claim 4, characterized in that: The distance between the two first lassoes (13) is greater than the distance between the two second lassoes (22).

6. The construction method for treating pile hole collapse after installation of cast-in-place pile reinforcement cage according to claim 5, characterized in that: Step S432 further includes the following steps: S4321, releasing the connection between the first drill tube (1) and the rotary drilling rig; S4322, the rotary drilling rig moves away from the perimeter of the pile hole; S4323, sleeve the support plate (14) on the outer surface of the first drill tube (1), and use the first bolt (1421) to fix the support plate (14) and the first drill tube (1); S4324: The rotary drilling rig travels and is pressed onto the support portion (143) of the support plate (14).

7. The construction method for treating pile hole collapse after installation of cast-in-place pile reinforcement cage according to claim 6, characterized in that: The support plate (14) is provided with a plug hole (141) adapted to fit the first drill tube (1); a convex ring (142) is provided on the upper surface of the support plate (14) at the position of the plug hole (141); a first screw hole for screwing a first bolt (1421) is opened on the side wall of the convex ring (142); and a first clamping hole for clamping the first bolt (1421) is provided on the side wall of the first drill tube (1).

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