A device and construction method for treating shallow broken CFG piles

Abstract

The present application relates to the field of CFG broken pile treatment, and in particular to a device and a construction method for treating shallow broken CFG piles. The device comprises a support plate and a slotting device arranged on the support plate, the slotting device comprises a slotting knife, the cross section of the slotting knife is a hollow rectangular shape, the slotting knife is arranged below the support plate and a discharge pipe is connected to the tail of the slotting knife, the discharge pipe is in a vertically arranged threaded shape, the upper end of the discharge pipe penetrates the support plate upward and extends to the top of the support plate, the inner diameter of the discharge pipe is equal to the outer diameter of the CFG pile, the radial width of the slotting knife and the discharge pipe is 100 mm, and a driving component is arranged on the support plate to drive the discharge pipe to rotate on the support plate, thereby achieving the effect of accelerating the CFG broken pile treatment efficiency and reducing the waste of steel pipe materials.

Description

Technical Field

[0001] The present application relates to the field of CFG broken pile treatment, and in particular to a device and a construction method for treating shallow broken CFG piles. Background Art

[0002] CFG pile (Cement Fly-ash Gravel) is a brittle pile foundation made of cement, fly ash, crushed stone, sand, stone chips and water. CFG piles, soil between piles and cushion layer together constitute CFG composite foundation. It is a foundation reinforcement method with strong adjustability, wide applicability, stability and reliability. Since there is no steel bar in the pile, the pile formation speed is fast and the economic benefit is good. It is widely used in the foundation treatment of high-rise residential buildings.

[0003] According to the relevant documents, due to the structural characteristics of CFG composite foundation, which are small pile diameter and close pile spacing, and CFG piles are generally constructed before excavation of foundation pit, shallow broken piles are prone to occur during the subsequent excavation of soil between piles and pile cutting. The existing method for dealing with shallow broken CFG piles is to use a steel pipe larger than the pile diameter to drive it 500mm below the broken pile part, cut off the excess steel pipe at the designed pile top elevation, then flatten and roughen the broken pile part, drill holes to plant reinforcement, grouting to fix it, and then re-inject the mixture. After the maintenance is completed, the steel pipe is removed to complete the pile repair.

[0004] The above-mentioned prior art solutions have the following defects: the processing efficiency of the above-mentioned CFG broken piles is low and it will cause waste of steel pipe materials. Summary of the invention

[0005] In order to improve the efficiency of CFG broken pile treatment and reduce the waste of steel pipe materials, the present application provides a device and a construction method for treating shallow broken CFG piles.

[0006] The above technical objectives of this application are achieved through the following technical solutions:

[0007] A device for processing shallow broken CFG piles comprises a support plate and a slotting device arranged on the support plate, the slotting device comprises a slotting knife, the cross section of the slotting knife is a hollow rectangular shape, the slotting knife is arranged below the support plate and a discharge pipe is connected to the tail of the slotting knife, the discharge pipe is in a vertically arranged threaded shape, the upper end of the discharge pipe penetrates the support plate upward and extends to the top of the support plate, the inner diameter of the discharge pipe is equal to the outer diameter of the CFG pile, the radial width of the slotting knife and the discharge pipe is 100 mm, and a driving component for driving the discharge pipe to rotate on the support plate is arranged on the support plate.

[0008] By adopting the above scheme, when it is necessary to deal with the shallow broken pile of the CFG pile, the support plate is moved until the slotting device corresponds to the position of the broken pile of the CFG pile, and the discharge pipe is kept coaxial with the CFG pile; after the device is started, the driving component drives the discharge pipe to rotate on the support plate, and the lower end of the discharge pipe is connected with a slotting knife. The discharge pipe is threaded as a whole, and people provide a downward pressure to the discharge pipe. As the discharge pipe rotates, the slotting knife will penetrate into the ground to perform slotting. During the slotting process, the miscellaneous soil generated will enter the discharge pipe, and people can clean the miscellaneous soil at the upper end of the discharge pipe; after the trench excavation is completed, people can put the pile head of the CFG pile Level and roughen the hole, then clean the loose soil on the hole wall and bottom. According to the distance between the bottom of the broken part of the CFG pile and the designed mark, after brushing plain cement slurry on the finished surface of the pile head, use static compaction method to backfill the designed cushion material in layers in the excavated pile hole to the pile top elevation, and the paving thickness of each layer is 100mm-150mm. Or, after brushing plain cement slurry on the chiseled surface of the pile head, pour a mixture with a grade higher than the original designed mixture to complete the pile filling. In this way, the pile filling process of CFG piles can be completed, so there is no need for people to drive or cut off the steel pipe at the broken pile part, which saves construction materials, is easy to operate, reduces the difficulty of excavating soil between piles and chiseling broken pile surfaces, and improves construction efficiency.

[0009] Preferably, a through hole is opened on the support plate for the discharge pipe to pass through, and a plurality of limit blocks that can be embedded in the outer surface of the discharge pipe are arranged at intervals on the support plate along the circumference of the through hole, and a limit groove that is compatible with the limit block is opened on the outer surface of the discharge pipe along the extension direction of the discharge pipe.

[0010] Preferably, an adjustment block is provided at the end of the limit block away from the through hole, and the adjustment block is embedded in the upper surface of the support plate. A guide groove is provided on the upper surface of the support plate for the adjustment block to move along the radial direction of the through hole, and an elastic member is provided inside the guide groove to drive the adjustment block to move toward the direction close to the through hole.

[0011] Preferably, a reinforcement plate is provided between the adjusting block and the limiting block.

[0012] Preferably, the driving assembly includes a driving gear arranged above the support plate, a tooth groove meshing with the driving gear is opened on the outer surface of the discharge pipe along the extension direction of the discharge pipe, and a driving motor is arranged on the support plate to drive the driving gear to rotate on the support plate.

[0013] Preferably, an auxiliary plate is provided on the support plate, and the driving gear and the driving motor are both provided on the auxiliary plate. The lower surface of the auxiliary plate is provided with a T-shaped slider embedded in the upper surface of the support plate, and the support plate is provided with an auxiliary part for driving the T-shaped slider to move toward or away from the discharge pipe.

[0014] Preferably, a clamping plate is arranged above the support plate, and a plurality of clamping plates are arranged along the circumference of the discharge pipe. A clamping roller capable of abutting against the outer surface of the discharge pipe is arranged on the side of the clamping plate close to the discharge pipe, and the central axis direction of the clamping roller is perpendicular to the extension direction of the discharge pipe.

[0015] Preferably, a fixing rod is provided on the side of the clamping plate close to the discharge pipe, the fixing rod extends horizontally toward the discharge pipe, a sliding rod is inserted into the end of the fixing rod away from the clamping plate, one end of the sliding rod away from the fixing rod is connected to the end of the clamping roller, and a pushing member is provided between the fixing rod and the sliding rod to drive the sliding rod to move toward the discharge pipe.

[0016] A construction method for treating shallow broken CFG piles comprises the following steps:

[0017] S1. Determine the position of the broken CFG pile, move the device to the top of the CFG pile, and make a groove around the CFG pile. The groove depth is 200 mm below the bottom of the broken position of the CFG pile.

[0018] S2. Measure the distance H between the bottom of the fractured part of the CFG pile and the designed pile top elevation;

[0019] S3, level and roughen the pile head along the bottom of the pile body fracture position, and remove the loose soil on the hole wall and bottom;

[0020] S4. If H<200mm, apply plain cement slurry on the chiseled surface of the pile head, and then use static compaction method to backfill the designed cushion material in layers in the excavated pile hole to the pile top elevation, with each layer paving thickness of 100mm-150mm; if 200mm≤H≤1000mm, after applying plain cement slurry on the chiseled surface of the pile head, pour a mixture one grade higher than the original designed mixture to complete the pile filling.

[0021] Preferably, in step S1, during the grooving process using the device, the debris generated will move from the upper end of the discharge pipe to the outside of the groove; correspondingly, the process of adding cushioning material or mixture to the groove mentioned in step S4 can also be completed through the discharge pipe in the device.

[0022] In summary, this application has the following technical effects:

[0023] 1. By setting up a device for treating shallow broken CFG piles, no steel pipes are needed in the process of treating shallow broken CFG piles, which can reduce the waste of steel pipe materials; only grooves need to be made around the shallow broken CFG piles, and then materials such as cushion layers are added, which is convenient for repair and improves the construction efficiency of the construction process of shallow broken CFG piles;

[0024] 2. By setting the limit block and the limit groove, the driving component drives the discharge pipe to rotate on the support plate, and the discharge pipe will move vertically downward under the action of the limit block and the limit groove, so that people do not need to use manpower to press the discharge pipe downward, which makes the device more convenient to use;

[0025] 3. By setting up a clamping plate and a clamping roller, the clamping plate will drive the clamping roller to abut against the outer surface of the discharge pipe. The clamping roller is rotatably installed on the clamping plate. During the rotation of the discharge pipe, the clamping roller will rotate with the discharge pipe. The clamping plate can clamp the discharge pipe through the clamping roller to keep the discharge pipe in a vertical state. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 : is the overall structure diagram of the device for treating shallow broken CFG piles in the embodiment of the present application;

[0027] Figure 2 It is a schematic diagram of the shallow broken pile repair process of the CFG pile in the embodiment of the present application;

[0028] Figure 3 yes Figure 1 A partial enlarged view of point A in the middle.

[0029] In the figure, 1. support plate; 11. through hole; 12. guide groove; 13. adjustment groove; 2. slotting device; 21. slotting knife; 22. discharge pipe; 221. limit groove; 222. tooth groove; 23. drive assembly; 231. auxiliary plate; 233. drive motor; 234. driving gear; 235. auxiliary screw rod; 236. drive gear; 24. limit assembly; 241. limit block; 242. adjustment block; 243. reinforcement plate; 244. elastic member; 3. universal wheel; 4. handle; 5. groove; 6. CFG pile; 7. clamping assembly; 71. clamping rod; 72. clamping plate; 73. clamping roller; 74. sliding rod; 75. fixing rod. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings.

[0031] Reference Figure 1 The present application provides a device for treating shallow broken CFG piles, comprising a support plate 1, a slotting device 2, a universal wheel 3 and a handle 4. The support plate 1 is arranged horizontally, the slotting device 2 is arranged on the support plate 1 and can slot an annular groove 5 on the ground, the universal wheel 3 is arranged below the support plate 1, and the handle 4 is fixed to one end of the support plate 1. The support plate 1 can be pushed to move on the ground by the handle 4, and the universal wheel 3 below the support plate 1 can facilitate people to change the moving direction of the device on the ground; after the support plate 1 is moved to a designated position, the slotting device 2 can slot an annular groove 5 on the ground.

[0032] Reference Figure 1 and Figure 2 The slotting device 2 includes a slotting knife 21, a discharge pipe 22, a driving assembly 23 and a limit assembly 24. The slotting knife 21 is arranged below the support plate 1. The cross-sectional shape of the slotting knife 21 is a hollow rectangular ring. One end of the discharge pipe 22 is connected and connected to the back of the slotting knife 21. The discharge pipe 22 is vertically arranged as a whole. The end of the discharge pipe 22 far away from the slotting knife 21 extends from bottom to top through the support plate 1 to the top of the support plate 1. A support is provided on the support plate 1. The support plate 1 passes through the through hole 11. In this embodiment, the inner surface diameter of the discharge pipe 22 is equal to the outer diameter of the CFG pile 6 to be repaired, the radial width of the slotting knife 21 and the discharge pipe 22 is 100 mm, and the inner diameter of the through hole 11 is larger than the outer diameter of the discharge pipe 22; the driving component 23 and the limiting component 24 are both arranged on the support plate 1, the driving component 23 can drive the discharge pipe 22 to rotate on the support plate 1, and the limiting component 24 can limit the discharge pipe 22 on the support plate 1.

[0033] When using the present device to open a groove 5 on the ground, it is necessary to ensure that the discharge pipe 22 and the CFG pile 6 remain coaxial, the driving component 23 will drive the discharge pipe 22 to rotate, and people will apply downward pressure to the discharge pipe 22. After the slotting knife 21 contacts the ground, it will start to open a groove 5 on the ground. The debris generated in the process of opening the groove 5 will enter the discharge pipe 22, and people can collect and clean the debris at the upper end of the discharge pipe 22; in the process of opening the groove 5, the limit component 24 can limit the discharge pipe 22 to keep the discharge pipe 22 in a vertical state; it should be noted here that when people apply pressure to the discharge pipe 22, they need to control the magnitude of the applied force so that for every rotation of the discharge pipe 22, the discharge pipe 22 moves toward the inside of the ground by a distance of one pitch of the discharge pipe 22, so as to ensure the smooth formation of the groove 5.

[0034] In the present embodiment, there are three groups of limit assemblies 24, which are evenly spaced on the support plate 1 along the circumference of the through hole 11. The limit assemblies 24 include a limit block 241, an adjustment block 242, a reinforcement plate 243 and an elastic member 244. One end of the limit block 241 extends to the inside of the through hole 11 and is inserted into the inside of the outer surface of the discharge pipe 22. A limit groove 221 is provided on the outer surface of the discharge pipe 22 along the extension direction of the discharge pipe 22; the adjustment block 242 is fixedly connected to the end of the limit block 241 away from the discharge pipe 22, and the adjustment block 242 is embedded in the upper surface of the support plate 1. A guide groove 12 is provided on the upper surface of the support plate 1 for the adjustment block 242 to reciprocate along the radial direction of the through hole 11; the reinforcement plate 243 is arranged between the adjustment block 242 and the limit block 241, and the elastic member 244 is arranged in the guide groove 12 and drives the adjustment block 242 to move in the direction close to the through hole 11.

[0035] The three limit blocks 241 inside the three groups of limit assemblies 24 will extend into the discharge pipe 22 near one end of the discharge pipe 22. When the driving assembly 23 drives the discharge pipe 22 to rotate, the discharge pipe 22 will move downward under the action of the three limit blocks 241, so that people do not need to apply downward pressure to the discharge pipe 22, making the device more convenient to use; further, the limit blocks 241 can reciprocate along the radial direction of the through hole 11 on the support plate 1, so that the limit assembly 24 can limit the discharge pipes 22 with different outer diameters, thereby expanding the scope of application of the limit assembly 24.

[0036] In this embodiment, the elastic member 244 is a spring. After the spring is installed inside the guide groove 12, the spring is in a compressed state.

[0037] In this embodiment, the driving assembly 23 is arranged between two adjacent groups of limit assemblies 24 on the support plate 1, which is specifically as follows: the driving assembly 23 includes an auxiliary plate 231, a T-shaped slider, a driving motor 233, a driving gear 234 and an auxiliary part, the auxiliary plate 231 is horizontally arranged above the support plate 1, the T-shaped slider is fixed on the lower surface of the auxiliary plate 231 and embedded in the upper surface of the support plate 1, and an auxiliary groove adapted to the T-shaped slider is opened on the upper surface of the support plate 1 along the radial direction of the through hole 11. The auxiliary part is arranged inside the auxiliary groove to drive the T-shaped slider to It reciprocates in the direction approaching or moving away from the through hole 11; the driving motor 233 is fixed above the auxiliary plate 231, and a driving gear 236 is sleeved on the output shaft of the driving motor 233. The central axis of the driving gear 234 has a certain angle with the vertical direction, which is as follows: the central axis direction of the driving gear 234 is perpendicular to the extension direction of the discharge pipe 22 here, the driving gear 234 is meshed with the driving gear 236, and a tooth groove 222 meshing with the driving gear 234 is opened on the outer surface of the discharge pipe 22 along the extension direction of the discharge pipe 22.

[0038] When the driving motor 233 is working, it will drive the driving gear 234 to rotate through the driving gear 236. During the rotation of the driving gear 234, the discharge pipe 22 will be driven to rotate through the tooth groove 222. It should be noted that when the outer diameter of the discharge pipe 22 changes, people can adjust the position of the T-shaped slider through auxiliary parts, so that the position of the auxiliary plate 231 on the support plate 1 can be changed, so that the position of the driving gear 234 can be adjusted.

[0039] The auxiliary part includes an auxiliary screw rod 235 arranged inside the auxiliary groove, the length direction of the auxiliary screw rod 235 is the same as the radial direction of the through hole 11, the auxiliary screw rod 235 passes through the T-shaped slider and is threadedly connected to the T-shaped slider, and the auxiliary screw rod 235 is rotatably connected to the support plate 1; an adjustment groove 13 is provided on the upper surface of the support plate 1, on the side of the auxiliary groove away from the through hole 11, and one end of the auxiliary screw rod 235 away from the through hole 11 extends into the inside of the adjustment groove 13. When the position of the T-shaped slider needs to be adjusted, people can drive the auxiliary screw rod 235 to rotate at the position of the adjustment groove 13.

[0040] Reference Figure 1 and Figure 3 In order to further enable the discharge pipe 22 to maintain a vertical state, three groups of clamping components 7 are further provided on the support plate 1 , and the three groups of clamping components 7 are evenly distributed along the circumference of the through hole 11 .

[0041] The clamping assembly 7 includes a clamping rod 71, a clamping plate 72, a clamping roller 73, a sliding rod 74, a fixed rod 75 and a pushing member. The clamping rod 71 is vertically arranged on the support plate 1, and the lower end of the clamping rod 71 is fixedly connected to the support plate 1, the clamping plate 72 is fixed to the upper end surface of the clamping rod 71, and a rotating shaft is passed through the clamping roller 73, and the rotating shaft is rotatably connected to the clamping roller 73, wherein the central axis of the rotating shaft is perpendicular to the extension direction of the discharge pipe 22 here; there are two fixed rods 75, and the two fixed rods 75 are parallel to each other. One end of the fixed rod 75 is fixedly connected to the side of the clamping plate 72 close to the through hole 11, and the other end extends in the direction close to the through hole 11, one end of the sliding rod 74 extends into the fixed rod 75 and is slidably connected to the fixed rod 75, and the other end is fixedly connected to one end of the rotating shaft, and the pushing member is arranged between the sliding rod 74 and the fixed rod 75 and can drive the sliding rod 74 to move in the direction away from the clamping plate 72.

[0042] Before installing the discharge pipe 22 on the support plate 1, the sliding rod 74 is driven by manpower to move toward the inside of the fixed rod 75, and then the discharge pipe 22 is inserted between the three clamping rollers 73 of the three sets of clamping components 7; thereafter, the sliding rod 74 is released, and the clamping rollers 73 inside the clamping components 7 will abut against the outer surface of the discharge pipe 22, and the three sets of clamping components 7 can further keep the discharge pipe 22 in a vertical state; further, the central axis of the clamping roller 73 is perpendicular to the extension direction of the discharge pipe 22, and the clamping roller 73 is rotatably connected to the rotating shaft. During the rotation of the discharge pipe 22, the clamping roller 73 will also rotate accordingly, thereby reducing the resistance of the discharge pipe 22 when it moves downward.

[0043] In this embodiment, the pushing member is a compressed spring, and other elastic members 244 having the same effect are still applicable.

[0044] The present application also provides a construction method for shallow broken piles of CFG piles, comprising the following steps:

[0045] S1, determine the position of the broken pile of CFG pile 6, move the device to the top of CFG pile 6, and groove around CFG pile 6, the groove depth is 200mm below the bottom of the broken position of CFG pile 6; during the process of using the device to groove, the generated debris will move from the upper port of the discharge pipe 22 to the outside of the groove 5;

[0046] S2, measure the distance H between the bottom of the fractured part of the CFG pile 6 and the designed pile top elevation;

[0047] S3, level and roughen the pile head along the bottom of the pile body fracture position, and remove the loose soil on the hole wall and bottom;

[0048] S4. If H<200mm, apply plain cement slurry on the chiseled surface of the pile head, and then use the static compaction method to backfill the designed cushion material in layers in the excavated pile hole using the above-mentioned device to the pile top elevation, with each layer paving thickness of 100mm-150mm; if 200mm≤H≤1000mm, after applying plain cement slurry on the chiseled surface of the pile head, use the above-mentioned device to cast a mixture one grade higher than the original designed mixture to complete the pile filling.

[0049] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A construction method for treating shallow broken CFG piles, characterized by: A device for treating shallow broken CFG piles is used, the device comprising a support plate (1) and a slotting device (2) arranged on the support plate (1), the slotting device (2) comprising a slotting knife (21), the slotting knife (21) having a hollow rectangular cross section, the slotting knife (21) being arranged below the support plate (1) and a discharge pipe (22) being connected to the tail of the slotting knife (21), the discharge pipe (22) being in a vertically arranged threaded shape, the upper end of the discharge pipe (22) penetrating upward through the support plate (1) and extending to the top of the support plate (1), the inner diameter of the discharge pipe (22) being equal to the outer diameter of the CFG pile (6), the radial width of the slotting knife (21) and the discharge pipe (22) being 100 mm, and a driving component (23) for driving the discharge pipe (22) to rotate on the support plate (1) being arranged on the support plate (1); The construction method for treating shallow broken CFG piles includes the following steps: S1, determining the position of the broken CFG pile (6), moving the device to the top of the CFG pile (6), and cutting a groove around the CFG pile (6), the groove depth being 200 mm below the bottom of the broken position of the CFG pile (6); S2, measuring the distance H between the bottom of the fractured part of the CFG pile (6) and the designed pile top elevation; S3, level and roughen the pile head along the bottom of the pile body fracture position, and remove the loose soil on the hole wall and bottom; S4. If H<200mm, apply plain cement slurry on the chiseled surface of the pile head, and then use static compaction method to backfill the designed cushion material in layers in the excavated pile hole to the pile top elevation, with each layer paving thickness of 100mm-150mm; if 200mm≤H≤1000mm, after applying plain cement slurry on the chiseled surface of the pile head, pour a mixture one grade higher than the original designed mixture to complete the pile filling.

2. A construction method for treating shallow broken CFG piles according to claim 1, characterized in that: A through hole (11) is provided on the support plate (1) for the discharge pipe (22) to pass through; a plurality of limit blocks (241) capable of being embedded in the inner part of the outer surface of the discharge pipe (22) are arranged at intervals on the support plate (1) along the circumference of the through hole (11); and a limit groove (221) adapted to the limit block (241) is provided on the outer surface of the discharge pipe (22) along the extension direction of the discharge pipe (22).

3. A construction method for treating shallow broken CFG piles according to claim 2, characterized in that: An adjustment block (242) is arranged at one end of the limit block (241) away from the through hole (11); the adjustment block (242) is embedded in the upper surface of the support plate (1); a guide groove (12) is provided on the upper surface of the support plate (1) for the adjustment block (242) to move along the radial direction of the through hole (11); and an elastic member (244) is arranged inside the guide groove (12) for driving the adjustment block (242) to move in a direction close to the through hole (11).

4. A construction method for treating shallow broken CFG piles according to claim 3, characterized in that: A reinforcing plate (243) is provided between the adjusting block (242) and the limiting block (241).

5. A construction method for treating shallow broken CFG piles according to claim 1, characterized in that: The driving assembly (23) comprises a driving gear (234) arranged above the support plate (1); a tooth groove (222) meshing with the driving gear (234) is provided on the outer surface of the discharge pipe (22) along the extension direction of the discharge pipe (22); and a driving motor (233) is provided on the support plate (1) for driving the driving gear (234) to rotate on the support plate (1).

6. A construction method for treating shallow broken CFG piles according to claim 5, characterized in that: An auxiliary plate (231) is arranged on the support plate (1), a driving gear (234) and a driving motor (233) are arranged on the auxiliary plate (231), a T-shaped slider (232) embedded in the interior of the upper surface of the support plate (1) is arranged on the lower surface of the auxiliary plate (231), and an auxiliary component for driving the T-shaped slider (232) to move toward or away from the discharge pipe (22) is arranged on the support plate (1).

7. A construction method for treating shallow broken CFG piles according to any one of claims 1 to 6, characterized in that: A clamping plate (72) is arranged above the support plate (1), and a plurality of clamping plates (72) are arranged along the circumference of the discharge pipe (22). A clamping roller (73) capable of abutting against the outer surface of the discharge pipe (22) is arranged on one side of the clamping plate (72) close to the discharge pipe (22), and the central axis direction of the clamping roller (73) is perpendicular to the extension direction of the discharge pipe (22).

8. A construction method for treating shallow broken CFG piles according to claim 7, characterized in that: A fixing rod (75) is provided on the side of the clamping plate (72) close to the discharge pipe (22), and the fixing rod (75) extends in the horizontal direction towards the discharge pipe (22). A sliding rod (74) is inserted into the end of the fixing rod (75) away from the clamping plate (72), and one end of the sliding rod (74) away from the fixing rod (75) is connected to the end of the clamping roller (73), and a pushing member is provided between the fixing rod (75) and the sliding rod (74) to drive the sliding rod (74) to move towards the discharge pipe (22).

9. A construction method for treating shallow broken CFG piles according to claim 1, characterized in that: In step S1, during the process of using the device to open the groove, the debris generated will move from the upper end of the discharge pipe (22) to the outside of the groove (5); correspondingly, the process of adding cushioning material or mixed material to the groove (5) mentioned in step S4 is also completed through the discharge pipe (22) in the device.

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