A device and method for re-forming a hole after a hole collapses before pouring pile foundation concrete

Abstract

The present invention discloses a device and method for re-drilling a hole after a hole collapses before pouring concrete for a pile foundation. The punching drill bit includes a first tube body with two ends extending through it, a plurality of steel wire ropes arranged on the outer wall of the first tube body, a first drill tooth holder connected to one end of the first tube body, and a plurality of first drill teeth arranged at the end of the first drill tooth holder. The hole-washing drill bit includes a second tube body with two ends extending through it, a plurality of rubber steel wire hoses arranged on the outer wall of the second tube body and connected to the second tube body, a second drill tooth holder connected to one end of the second tube body, a plurality of second drill teeth arranged at the end of the second drill tooth holder, and a one-way valve arranged at one end of the second tube body, the one-way valve opening direction being toward the other end of the second tube body. When re-drilling a hole after a hole collapses before pouring concrete for a pile foundation, the steel cage embedded in the pile hole is not damaged, and there is no need to reprocess and reinstall the pile foundation steel cage, thereby improving construction efficiency and reducing construction costs.

Description

Technical Field

[0001] The patent of this invention relates to the technical field of highway construction equipment, specifically a device and method for re-forming holes after the holes collapse before pouring pile foundation concrete. Background Art

[0002] Pile foundations are the most common form of foundation used in highway construction. When the geology is sandy, reverse circulation drilling is often used. Due to the unstable sand geology during construction, mud wall protection is generally used. Mud wall protection has high requirements and is difficult to control, making it prone to hole collapse. If a hole collapse occurs during the drilling process, re-drilling can be used; however, concrete pouring can only be carried out after the hole is drilled, and subsequent processes such as hole testing, steel cage installation, and conduit installation are completed. The longer the wait after drilling, the greater the probability of hole collapse. If a hole collapse occurs after the steel cage is installed, the cage is buried in the hole and cannot be removed, making reverse circulation drilling impossible.

[0003] At present, when encountering such a situation, an impact drill is often used for re-drilling. When the impact drill is used for drilling, the steel cage buried in the pile hole is damaged and cannot be reused. The pile foundation steel cage needs to be reprocessed and reinstalled, resulting in a long construction period and high cost. Summary of the Invention

[0004] In response to the problems existing in the prior art, the present invention provides a device and method for re-forming a hole after a hole collapses before pouring pile foundation concrete. When the hole collapses before pouring pile foundation concrete and then the hole is re-formed, the steel cage buried in the pile hole is not damaged, and there is no need to reprocess the pile foundation steel cage and reinstall it, which can improve construction efficiency and reduce construction costs.

[0005] In order to solve the above technical problems, the present invention is implemented through the following technical solutions:

[0006] A device for re-drilling a hole after collapse before pouring pile foundation concrete, comprising a punching drill bit and a hole-washing drill bit for detachable connection to the drill rod of a drilling machine; the punching drill bit comprises a first tube body with both ends passed through, a plurality of steel wire ropes arranged on the outer wall of the first tube body, a first drill tooth holder connected to one end of the first tube body, and a plurality of first drill teeth arranged at the end head of the first drill tooth holder; the hole-washing drill bit comprises a second tube body with both ends passed through, a plurality of rubber steel wire hoses arranged on the outer wall of the second tube body and connected to the second tube body, a second drill tooth holder connected to one end of the second tube body, a plurality of second drill teeth arranged at the end head of the second drill tooth holder, and a one-way valve arranged at one end of the second tube body, the opening direction of the one-way valve being toward the other end of the second tube body.

[0007] Furthermore, a plurality of the steel ropes are arranged on the outer wall of the second tube body near the second drill tooth frame.

[0008] Furthermore, a plurality of the steel wire ropes are evenly arranged on the outer wall of the first tube body.

[0009] Furthermore, a plurality of the rubber steel hoses are evenly arranged on the outer wall of the second tube body.

[0010] Furthermore, a plurality of the first drill teeth are evenly arranged at the end of the first drill tooth holder.

[0011] Furthermore, a plurality of the second drill teeth are evenly arranged at the end of the second drill tooth holder.

[0012] Furthermore, the other end of the first tube body and the other end of the second tube body are respectively used to be connected to the drill rod through threads.

[0013] Furthermore, the length of the steel wire rope is greater than the inner diameter of the steel cage in the collapsed hole.

[0014] A method for re-forming a hole after a hole collapses before pouring concrete for a pile foundation, using the device for re-forming a hole after a hole collapses before pouring concrete for a pile foundation, comprising:

[0015] Punching is performed using the punching drill bit, and after punching is completed, the hole washing drill bit is used to wash the hole;

[0016] When the punching drill bit is used for punching, the other end of the first tube body is connected to the drill rod of the drilling machine, and the pump body of the drilling machine is connected to the drill rod. The drilling machine drives the drill rod to drive the first tube body to rotate, and the first drill tooth rack and the first drill teeth loosen the mud and sand in front. The steel wire ropes swing and drive the surrounding mud and sand, so that the surrounding mud and sand are in a suspended state. The pump body is controlled to pump the suspended mud and sand out of the hole through the lower port of the first tube body.

[0017] When the hole-washing drill bit is used for hole washing, the other end of the second pipe body is connected to the drill rod of the hole-forming machine. The hole-forming machine drives the drill rod to drive the second pipe body to rotate, and controls the pump body to inject external mud into the second pipe body through the drill rod. The mud is sprayed onto the steel cage and the retaining wall through the plurality of rubber steel wire hoses, and the mud and sand on the steel cage and between the steel cage and the retaining wall are cleaned. The mud and sand sink to the bottom of the hole with the mud, and the second drill tooth rack and the plurality of second drill teeth loosen the mud and sand at the bottom of the hole. Then the pump body is controlled to pump out, and the one-way valve is opened. The loosened mud and sand are pumped out of the hole through the lower port of the second pipe body.

[0018] Furthermore, after the second drill tooth rack and the plurality of second drill teeth loosen the mud and sediment at the bottom of the hole, the plurality of steel wire ropes on the second pipe body swing to drive the mud and sediment, so that the mud and sediment are in a suspended state.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] The present invention provides a device for re-drilling a hole after it collapses before pouring pile foundation concrete. The device is used in combination with a punching drill bit and a hole washing drill bit. A plurality of steel wire ropes are arranged on the outer wall of the first tube body of the punching drill bit. When punching, the other end of the first tube body is connected to the drill rod of the hole-forming machine, and the pump body of the hole-forming machine is connected to the drill rod. The hole-forming machine drives the drill rod to drive the first tube body to rotate, and the first drill tooth frame and a plurality of first drill teeth loosen the mud and sand in front. The plurality of steel wire ropes swing to drive the surrounding mud and sand, so that the surrounding mud and sand are in a suspended state. The swing of the steel wire rope can knock out the mud and sand between the steel cage and the retaining wall, and the swing of the steel wire rope will not damage the steel cage. The suspended mud and sand are pumped out of the hole through the lower port of the first tube body by controlling the pump body. After the punching is completed, the hole is washed with a drilling bit. The second tube body of the drilling bit is provided with a rubber steel wire hose. When washing the hole, the other end of the second tube body is connected to the drill rod of the drilling machine. The drilling machine drives the drill rod to drive the second tube body to rotate, and the pump body is controlled to inject external mud into the second tube body through the drill rod. Under the action of the pump pressure, the mud in the second tube body is sprayed onto the steel cage and the retaining wall through a plurality of rubber steel wire hoses. The mud can clean up the mud and sand on the steel cage and between the steel cage and the retaining wall. The mud sinks to the bottom of the hole with the mud. The second drill tooth frame and a plurality of second drill teeth loosen the mud and sand at the bottom of the hole, and then the pump body is controlled to pump out. When pumping out, the one-way valve is opened, and the loosened mud and sand are pumped out of the hole through the lower port of the second tube body. It can be seen that when the drilling device of the present invention is used to re-drill the collapsed hole before the pile foundation concrete is poured, the steel cage buried in the pile hole is not damaged, and there is no need to reprocess the pile foundation steel cage and reinstall it, which can improve construction efficiency and reduce construction costs.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the specific embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1This is a schematic diagram of the punching drill structure in a device for re-forming a hole after a hole collapses before pouring pile foundation concrete according to the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of a hole-washing drill bit in a device for re-forming a hole after a hole collapses before pouring pile foundation concrete according to the present invention;

[0025] Figure 3 This is a schematic diagram of a device for re-forming a hole after a hole collapses before pouring pile foundation concrete according to the present invention during punching;

[0026] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;

[0027] Figure 5 This is a schematic diagram of a device for re-forming a hole after a hole collapses before pouring pile foundation concrete according to the present invention during hole washing;

[0028] Figure 6 for Figure 5 A partial enlarged view of point B in the middle.

[0029] In the figure: 1-punching drill bit; 101-first tube; 102-wire rope; 103-first drill tooth holder; 104-first drill tooth;

[0030] 2-hole washing drill bit; 201-second tube body; 202-rubber wire hose; 203-second drill tooth holder; 204-second drill tooth; 205-one-way valve;

[0031] 3-Drilling machinery; 4-Drill pipe; 5-Pump body; 6-Reinforcement cage; 7-Wall protection. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] As a specific embodiment of the present invention, Figures 1 to 6 As shown, a device for re-drilling a hole after a hole collapses before pouring pile foundation concrete comprises a punching drill bit 1 and a hole-washing drill bit 2 for detachably connecting to a drill rod 4 of a drilling machine 3.

[0034] like Figure 1As shown, the punching drill bit 1 includes a first tube body 101 with two ends extending through it, a plurality of steel wire ropes 102 arranged on the outer wall of the first tube body 101, a first drill tooth holder 103 connected to one end of the first tube body 101, and a plurality of first drill teeth 104 disposed at the end of the first drill tooth holder 103. More specifically, one end of the plurality of steel wire ropes 102 is welded to the outer wall of the first tube body 101, the first drill tooth holder 103 is welded to one end of the first tube body 101, and the first drill tooth holder 103 does not affect the through-connection of the two ends of the first tube body 101. The plurality of first drill teeth 104 are welded to the end of the first drill tooth holder 103. For example, the first drill tooth holder 103 is a U-shaped holder. Preferably, the plurality of first drill teeth 104 are uniformly welded to the end of the first drill tooth holder 103.

[0035] like Figure 2 As shown, the hole flushing drill bit 2 includes a second tube body 201 with two ends extending therethrough, a plurality of rubber steel hoses 202 arranged on the outer wall of the second tube body 201 and communicating with the second tube body 201, a second drill tooth holder 203 connected to one end of the second tube body 201, a plurality of second drill teeth 204 disposed at the end of the second drill tooth holder 203, and a one-way valve 205 disposed at one end of the second tube body 201. The one-way valve 205 opens toward the other end of the second tube body 201. More specifically, the one-way valve 205 can open toward the inside of the second tube body 201 only when the one-way valve 205 is being pumped outward. One end of a plurality of rubber steel hoses 202 is welded to the outer wall of the second tube body 201. Each rubber steel hose 202 is in communication with the inner cavity of the second tube body 201. A second drill tooth holder 203 is welded to one end of the second tube body 201. The second drill tooth holder 203 does not affect the connection between the two ends of the second tube body 201. A plurality of second drill teeth 204 are welded to the ends of the second drill tooth holder 203. For example, the second drill tooth holder 203 is a U-shaped holder. Preferably, the plurality of second drill teeth 204 are uniformly welded to the ends of the second drill tooth holder 203.

[0036] Combine Figures 3 to 6 As shown, when the apparatus for re-drilling a hole after collapse before pouring pile foundation concrete provided by this embodiment is used to re-drill, the re-drilling method is: first, a punching drill bit 1 is used to punch the hole, and after the punching is completed, a hole washing drill bit 2 is used to wash the hole, specifically as follows:

[0037] When punching with the punching drill 1, Figure 3 and Figure 4As shown, the other end of the first tube body 101 is connected to the drill rod 4 of the drilling machine 3. In this embodiment, the first tube body 101 and the drill rod 4 are connected by threaded connection, and the pump body 5 of the drilling machine 3 is connected to the drill rod 4. The drilling machine 3 drives the drill rod 4 to drive the first tube body 101 to rotate, and the first drill tooth rack 103 and several first drill teeth 104 loosen the mud and sand in front, and several wire ropes 102 swing to drive the surrounding mud and sand, so that the surrounding mud and sand are in a suspended state. The pump body 5 is controlled to draw the suspended mud and sand out of the hole through the lower port of the first tube body 101 until the designed hole depth is reached, and the punching is completed and the punching drill bit 1 is removed.

[0038] When using the hole washing drill bit 2 for hole washing, if Figure 5 and Figure 6 As shown, the other end of the second tube body 201 is connected to the drill rod 4 of the drilling machine 3. In this embodiment, the second tube body 201 and the drill rod 4 are connected by a threaded connection. The drilling machine 3 drives the drill rod 4 to rotate the second tube body 201, and the pump body 5 is controlled to inject external mud into the second tube body 201 through the drill rod 4. Under the action of the pump pressure, the mud in the second tube body 201 is sprayed onto the steel cage 6 and the retaining wall 7 through the rubber steel hoses 202. The mud can clear the mud and sand on the steel cage 6 and between the steel cage 6 and the retaining wall 7. The mud sinks to the bottom of the hole with the mud. The second drill tooth frame 203 and the second drill teeth 204 loosen the mud and sand at the bottom of the hole. The pump body 5 is then controlled to pump outward. During this pumping process, the one-way valve 205 is opened, and the loosened mud and sand are pumped out of the hole through the lower end of the second tube body 201. This process is repeated cyclically. After the designed hole diameter and depth are reached, the hole is tested.

[0039] When punching, the pipe body reaches the designed depth (the sediment meets the design requirements), indicating that the punching is completed, then the drill is lifted, the punching drill bit is replaced, and the hole washing drill bit is used. When the hole washing reaches the designed depth and continues for a period of time, the emptying work is completed, then the drill is lifted, the steel cage is adjusted in the center, and then it is tested with a hole and groove detector.

[0040] Based on the above embodiment, as a more preferred embodiment, several steel wire ropes 102 are arranged on the outer wall of the second tubular body 201 near the second drill tooth frame 203. During hole washing, the swinging of the steel wire ropes 102 can suspend the mud and sediment at the bottom of the hole, further facilitating their extraction out of the hole through the lower end of the second tubular body 201. Preferably, the steel wire ropes 102 are evenly arranged on the outer wall of the second tubular body 201 near the second drill tooth frame 203 by welding. For example, two rows of steel wire ropes 102 are arranged near the second drill tooth frame 203.

[0041] Based on the above embodiment, as a more preferred embodiment, a plurality of steel wire ropes 102 are evenly arranged on the outer wall of the first tube body 101 by welding. Similarly, a plurality of rubber steel hoses 202 are evenly arranged on the outer wall of the second tube body 201 by welding.

[0042] In the present invention, the length of the steel wire rope 102 can be selected based on the hole diameter. The number and spacing of the steel wire ropes are selected based on the hole depth and the wear resistance of the steel wire ropes. The diameter of the steel wire ropes can be selected based on the density of the sediment; the denser the sediment, the thicker the steel wire rope. The length of the steel wire rope can be adjusted during punching to accommodate piles of varying diameters. The length of the rubber steel hose and steel wire rope can also be adjusted during hole washing to accommodate piles of varying diameters. When punching, the recommended length of the steel wire rope is equal to the inner diameter of the reinforcement cage + 5 cm. When washing, the recommended length of the steel wire rope is equal to the inner diameter of the reinforcement cage + 10 cm.

[0043] In one embodiment, the first tube body 101 and the second tube body 201 are modified from old drill rods or discarded drill bits, the rubber steel wire hose 201 can be a 60MPa hydraulic hose purchased from a building materials market, the steel wire rope 101 can be a discarded steel wire rope, and the length can be determined according to the site, the first drill tooth rack 103 and the second drill tooth rack 203 can be cut from 5cm thick Q345 steel plate, the first drill tooth 104 and the second drill tooth 204 can be teeth circulated on the market, and the first drill tooth 104 and the second drill tooth 204 are made of alloy steel. In order to loosen the collapsed mud and sand and crush branches and other debris in the mud and sand, the one-way valve 205 can be purchased or made by yourself according to what is available on site.

[0044] In one embodiment, after a pile foundation collapses, the collapsed pile foundation is first backfilled with the original pile slag to stabilize the surrounding mud and sand (the original reinforcement cage hanger bars cannot be cut at this time). When the hole-making device of the present invention is used to re-drill the collapsed hole, the punching drill bit 1 is first used for punching, and then the hole-washing drill bit 2 is used for washing. Figure 3 As shown, when punching, the first tube body 101 is connected to the drill rod 4 of the drilling machine 3 by threading, the wire rope 102 is evenly distributed on the first tube body 101, the first drill tooth frame 103 is welded to one end of the first tube body 101, and the first drill tooth 104 is embedded in the first drill tooth frame 103. When the drilling machine 3 drives the drill rod 4 to rotate, the wire rope 102, the first drill tooth frame 103 and the first drill tooth 104 on the first tube body 101 are driven to rotate, and the first drill tooth frame 103 and the first drill tooth 104 loosen the mud and sand in front. The rotation of the wire rope 102 drives the surrounding mud and sand, so that the surrounding mud and sand are in a suspended state. The mud and sand are pumped out of the hole from the lower port of the first tube body 101 by controlling the pump body 5 of the drilling machine to reach the designed depth, check the sand rate, and stop punching if the sand rate meets the design requirements. Then lift the drill rod and replace the hole washing drill bit 2. Figure 5 As shown, during hole washing, the second pipe body 201 is connected to the drill rod 4 of the drilling machine 3 by means of thread connection, and the rubber steel wire hose 202 is evenly distributed on the second pipe body 201. Two rows of steel wire ropes 102 are arranged near the second drill tooth frame 203. When the second pipe body 201 rotates, it can drive the mud and sand to be in a suspended state. The second drill tooth frame 203 is welded to one end of the second pipe body 201, and the second drill tooth 204 is embedded in the second drill tooth frame 203. The one-way valve 205 is arranged at the bottom of the second pipe body 201. After the hole washing starts, the drilling machine 3 drives the drill rod 4 to rotate, which drives the second pipe body 201 to rotate. The rubber steel wire hose 202, the steel wire rope 102, the second drill tooth frame 203 and the second drill tooth 204 rotate together. The pump body 5 of the drilling machine injects mud (with pressure) into the second pipe body 201 through the drill rod 4, and the mud flows through the rubber steel wire hose 202 and is sprayed onto the steel The second drill tooth 203 and the second drill tooth 204 will reach the sediment position and begin to loosen the mud and sediment. The wire rope 101 starts to drive the loosened mud and sediment, making the mud and sediment suspended in the air. At this time, the drilling machine pump body 5 starts to flow the mud and sediment in the hole through the one-way valve 205, through the second pipe body 201 and then into the drill pipe 4, and finally discharge the mud and sediment into the hole. At this time, the one-way valve 205 is normally open until the designed hole depth is reached, the hole washing is stopped, and the hole cleaning is started. The sediment meets the design specifications and the mud sand content meets the design requirements. The hole cleaning is stopped, the drill pipe is lifted, and the hole is tested.

[0045] Before re-drilling, the surrounding soil must be reinforced, the steel cage must be fixed to prevent it from shifting during construction, and slurry must be prepared. After re-drilling, the hole is tested, the guide tube is installed, and concrete is poured.

[0046] The present invention is suitable for re-drilling when a hole collapses after the pile foundation reinforcement cage is lowered into place and the original reinforcement cage is used. It is easy to process and has a low manufacturing cost. It also has the characteristics of simple operation, quick installation, flexible use, reduced cost for handling collapsed holes, shortened construction period, etc., and is suitable for on-site application.

[0047] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed by the present invention, or replace some of the technical features therein with equivalents. Such modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A device for re-forming a hole after a hole collapses before pouring concrete for pile foundation, characterized in that: The invention comprises a punching drill bit (1) and a hole-washing drill bit (2) for detachably connecting to a drill rod (4) of a hole-forming machine (3); the punching drill bit (1) comprises a first tube body (101) with two ends passing through, a plurality of steel wire ropes (102) arranged on the outer wall of the first tube body (101), a first drill tooth frame (103) connected to one end of the first tube body (101), and a plurality of first drill teeth (104) arranged at the end of the first drill tooth frame (103); the hole-washing drill bit (2) comprises a second tube body (101) with two ends passing through, body (201), a plurality of rubber steel wire hoses (202) arranged on the outer wall of the second tube body (201) and in communication with the second tube body (201), a second drill tooth rack (203) connected to one end of the second tube body (201), a plurality of second drill teeth (204) arranged at the end of the second drill tooth rack (203), and a one-way valve (205) arranged at one end of the second tube body (201), wherein the opening direction of the one-way valve (205) is toward the other end of the second tube body (201); A plurality of steel wire ropes (102) are arranged on the outer wall of the second tube (201) at a position close to the second drill tooth frame (203); A plurality of steel wire ropes (102) are evenly distributed on the outer wall of the first tube (101); The length of the steel wire rope (102) is greater than the inner radius of the steel cage (6) in the collapsed hole.

2. A device for re-forming a hole after a hole collapses before pouring pile foundation concrete according to claim 1, characterized in that: A plurality of the rubber steel wire hoses (202) are evenly distributed on the outer wall of the second tube body (201).

3. The device for re-forming a hole after a hole collapses before pouring pile foundation concrete according to claim 1, characterized in that: A plurality of the first drill teeth (104) are evenly arranged on the end of the first drill tooth frame (103).

4. The device for re-forming a hole after a hole collapses before pouring pile foundation concrete according to claim 1, characterized in that: A plurality of the second drill teeth (204) are evenly arranged on the end of the second drill tooth frame (203).

5. The device for re-forming a hole after a hole collapses before pouring pile foundation concrete according to claim 1, characterized in that: The other end of the first tube body (101) and the other end of the second tube body (201) are respectively used for connection with the drill rod (4) through threads.

6. A method for re-forming a hole after the hole collapses before pouring concrete for pile foundation, characterized in that: The device for re-forming a hole after a hole collapses before pouring pile foundation concrete according to any one of claims 1 to 5 comprises: The punching drill bit (1) is used to perform punching, and after the punching is completed, the hole washing drill bit (2) is used to wash the hole; When the punching drill bit (1) is used for punching, the other end of the first tube body (101) is connected to the drill rod (4) of the hole-forming machine (3), and the pump body (5) of the hole-forming machine (3) is connected to the drill rod (4). The hole-forming machine (3) drives the drill rod (4) to drive the first tube body (101) to rotate, the first drill tooth rack (103) and the first drill teeth (104) loosen the mud and sand in front, and the steel wire ropes (102) swing to drive the surrounding mud and sand, so that the surrounding mud and sand are in a suspended state. The pump body (5) is controlled to extract the suspended mud and sand out of the hole through the lower port of the first tube body (101); When the hole-washing drill bit (2) is used for hole-washing, the other end of the second pipe body (201) is connected to the drill rod (4) of the hole-forming machine (3). The hole-forming machine (3) drives the drill rod (4) to drive the second pipe body (201) to rotate, and controls the pump body (5) to inject external mud into the second pipe body (201) through the drill rod (4). The mud is sprayed onto the steel cage (6) and the retaining wall (7) through the plurality of rubber steel wire hoses (202), and the mud and sand on the steel cage (6) and between the steel cage (6) and the retaining wall (7) are cleaned. The mud and sand sink to the bottom of the hole with the mud, and the second drill tooth frame (203) and the plurality of second drill teeth (204) loosen the mud and sand at the bottom of the hole. Then the pump body (5) is controlled to pump out, and the one-way valve (205) is opened. The loosened mud and sand are pumped out of the hole through the lower port of the second pipe body (201).

7. A method for re-forming a hole after the hole collapses before pouring pile foundation concrete according to claim 6, characterized in that: After the second drill tooth frame (203) and the plurality of second drill teeth (204) loosen the mud and sediment at the bottom of the hole, the plurality of steel wire ropes (102) on the second pipe body (201) swing to drive the mud and sediment, so that the mud and sediment are in a suspended state.

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