Pile foundation construction device and construction method for collapsed hole site of cast-in-place pile

Abstract

This invention belongs to the field of pile foundation construction technology, specifically a pile foundation construction device and method for the collapsed section of a bored pile. It includes a foundation, with a protective casing inserted inside. A grouting hole is formed inside the foundation, and a support member is connected to the inside of the grouting hole via an adjustment mechanism. An annular groove is formed on the surface of the support member, and a detection platform is slidably connected to the inner wall of the groove. A sealing ring is fixedly installed on the surface of the support member. The support member and the detection platform are placed at the bottom of the grouting hole via the adjustment mechanism. The sealing ring prevents liquid from entering the platform from the grouting hole, thus avoiding damage to the pressure sensor. When the pressure sensor is compressed, it transmits a signal to a ground alarm device, alerting workers to the collapse. Furthermore, based on the pressure data returned by the pressure sensor, a small pressure reading indicates a small-scale collapse, while a large pressure reading indicates a large-scale collapse, allowing for the development of different repair plans.

Description

Technical Field

[0001] This invention belongs to the field of pile foundation construction technology, specifically a pile foundation construction device and construction method for the collapsed part of a bored cast-in-place pile. Background Technology

[0002] In bridge engineering, cast-in-place piles are required. Cast-in-place piles are piles made by drilling in place and pouring concrete or reinforced concrete. A common method is drilled cast-in-place piles, which are made by drilling in place using augers, submersible drilling rigs, etc., and pouring concrete to form piles. There is no vibration or soil displacement during construction, but the settlement of the piles is slightly larger.

[0003] Regarding existing related technologies, the inventor believes that they often have the following drawbacks: After the grouting holes of bridge cast-in-place piles on the market are drilled, hole collapse may occur. The traditional method of detecting hole collapse is to place a sounding hammer into the grouting hole. When the sounding hammer that was originally stationary in the ground cannot be pulled out or put back in, and the measured hole depth differs significantly from the original hole depth, it can be confirmed that the hole has collapsed. This method cannot detect the occurrence of hole collapse in a timely manner, nor can it quickly understand the severity of the hole collapse, and it cannot quickly formulate a repair plan based on the severity of the hole collapse.

[0004] Therefore, the present invention provides a pile foundation construction device and construction method for the collapsed part of a bored cast-in-place pile. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The pile foundation construction device for the collapsed part of the bored pile of the present invention includes a foundation, a protective casing is inserted inside the foundation, a grouting hole is opened inside the foundation, a support member is connected inside the grouting hole through an adjustment mechanism, an annular groove is opened on the surface of the support member, a detection platform is slidably connected to the inner wall of the annular groove, a sealing ring is fixedly installed on the surface of the support member, the side of the sealing ring away from the support member abuts against the inner wall of the detection platform, a pressure sensor is fixedly installed on the inner wall of the detection platform, the pressure sensor is located directly below the support member, and the pressure sensor is connected to a ground alarm device;

[0007] After the grouting holes for bridge piles are drilled, collapse can occur. Traditional methods for detecting collapse involve placing a sounding hammer into the hole. If the sounding hammer, initially positioned in the ground, cannot be pulled out or reinserted, and the measured hole depth differs significantly from the original depth, a collapse is confirmed. However, this method cannot promptly detect collapses, nor can it quickly assess their severity or formulate a repair plan. To detect collapses in real time, an adjustment mechanism is used to place a support and testing platform at the bottom of the grouting hole. When the inside of the grouting hole... When a hole collapses, the soil at the collapsed area falls onto the support component. The support component then moves within the testing platform and compresses the pressure sensor. As the support component moves within the testing platform, the sealing ring prevents liquid from the injection hole from entering the platform, thus avoiding damage to the pressure sensor. When the pressure sensor is compressed, it transmits a signal to the ground alarm device, alerting the staff to the hole collapse. Furthermore, based on the pressure data returned by the pressure sensor, it can determine whether a small pressure reading indicates a small-scale hole collapse or a large pressure reading indicates a large-scale hole collapse, allowing for the development of different repair plans.

[0008] Preferably, the surface of the pressure sensor is covered with a waterproof membrane, which is elastic. After long-term use, the sealing ring may experience a weakening of its sealing effect. When the sealing effect of the sealing ring weakens and water enters the detection platform, the waterproof membrane can temporarily prevent water from contacting the pressure sensor. The sealing ring should be replaced promptly after the detection platform is removed from the injection hole.

[0009] Preferably, the adjusting mechanism includes a retaining sleeve fitted onto the surface of the protective sleeve. A support platform is fixedly mounted on the surface of the retaining sleeve, a take-up roller is rotatably mounted on the surface of the support platform, a take-up motor is fixedly mounted on the surface of the support platform, the output shaft of the take-up motor is fixedly connected to the surface of the take-up roller, a steel cable is fixedly connected to the surface of the take-up roller, a connecting platform is fixedly mounted at the other end of the steel cable, a support member is fixedly mounted on the lower surface of the connecting platform, and a support wheel is fixedly mounted on the surface of the retaining sleeve. The surface abuts against the steel cable; after placing the support and the testing platform into the injection hole, the ferrule is secured to the protective sleeve, and then the winding motor is started. The winding motor drives the winding roller to rotate, releasing the wound steel cable. Then the support and the testing platform move towards the bottom of the injection hole, thus achieving the effect of placing the support and the testing platform into injection holes of different depths. After use, the winding motor is reversed, and the winding motor and the winding roller work together to wind up the steel cable. The support wheel can assist in the winding and releasing of the steel cable, avoiding excessive friction between the steel cable and the ferrule.

[0010] Preferably, a sleeve is fixedly installed on the inner wall of the testing platform, and a slide cylinder is slidably and sealingly installed on the inner wall of the sleeve. The upper surface of the slide cylinder is fixedly connected to the lower surface of the support member. A connecting hole is opened on the surface of the slide cylinder. A set of movable rods is fixedly installed on the lower surface of the slide cylinder. A movable plate is slidably installed on the surface of the movable rods. A spring is fixedly installed on the surface of the movable rods. The other end of the spring is fixedly connected to the surface of the movable plate. A fine hole is opened on the surface of the movable plate. The diameter of the fine hole is smaller than that of the connecting hole. The movable plate fits against the lower surface of the slide cylinder. When the hole collapses, a large amount of soil falls onto the support member. When the support member is hit by a large amount of soil, the support member drives the slide cylinder into the sleeve. During movement, the spring causes the movable plate to abut against the surface of the slide cylinder. Air from inside the sleeve enters the slide cylinder through the small holes. Because the holes are small, they act as dampers, causing the support to slowly compress towards the pressure sensor. This prevents dirt from hitting the support and causing it to collide with the pressure sensor, which could damage it. While protecting the pressure sensor, this also ensures that the pressure sensor can read the pressure. When the support needs to reset, air from inside the slide cylinder enters the sleeve through the connecting hole. This air causes the movable plate to move and compress the spring. Once the movable plate releases its grip on the connecting hole, air can enter the sleeve through the larger connecting hole, allowing the support to reset quickly.

[0011] Preferably, the testing platform has an internal mounting groove, and an electromagnet is fixedly installed on the inner wall of the mounting groove. A set of springs is fixedly installed on the surface of the electromagnet, and a detection rod is fixedly installed on the other end of the springs. The detection rod is made of magnet. When the electromagnet is energized, it repels the detection rod. When a small-scale hole collapse occurs, the electromagnet is energized. The electromagnet generates magnetism and repels the detection rod, causing it to move and stretch the springs. After moving, the detection rod will pop out of the testing platform and abut against the inner wall of the injection hole. At this time, the adjustment mechanism is activated to drive the testing platform to move slowly upward. When the testing platform moves to the collapsed hole, the detection rod will insert into the collapsed hole. Then the testing platform can no longer move upward, thus clearly knowing the location of the collapsed hole and facilitating filling of the collapsed hole.

[0012] Preferably, the end of the detection rod away from the spring has a groove, and a roller is rotatably mounted on the inner wall of the groove; after the detection rod is ejected into the monitoring platform, the roller abuts against the inner wall of the injection hole and rotates when the detection rod moves up and down, thereby reducing the friction force when the detection rod moves and facilitating the movement of the monitoring platform.

[0013] Preferably, the connecting platform is equipped with a set of telescopic rods, and a push plate is fixedly installed at the output end of the telescopic rods. After the location of the collapsed hole is determined, the second spring pulls the detection rod to retract into the detection platform. The adjustment mechanism drives the detection platform to move downward a short distance (i.e., the distance between the middle of the push plate and the mounting groove) so that the connecting platform is flush with the collapsed hole. Then, the telescopic rod is activated, and the telescopic rod drives the push plate to reciprocate, pushing the soil on the support to the collapsed hole to fill it and complete the collapsed hole.

[0014] Preferably, the connecting platform has an internal cavity, and a forward / reverse motor is fixedly installed on the inner wall of the cavity. A frustum is fixedly installed on the output end of the forward / reverse motor, and a set of telescopic rods is fixedly connected to the surface of the frustum. After the telescopic rods extend, they shorten, and then the forward / reverse motor drives the telescopic rods to rotate a certain angle. Then the telescopic rods extend and shorten again, and the forward / reverse motor drives the telescopic rods to rotate in the opposite direction a certain angle, so that the position of the push plate changes from before. By repeating this process several times, the blind zone between the push plates can be reduced, and the filling effect can be improved.

[0015] Preferably, a wiping component is fixedly installed on the inner wall of the sleeve, and the wiping component is made of rubber; when the adjusting mechanism drives the winding roller to wind up the steel cable, the wiping component scrapes off the water and impurities on the surface of the steel cable, thereby cleaning the steel cable and preventing water stains and impurities from remaining on the surface of the steel cable after winding, which would cause the steel cable to rust.

[0016] A pile foundation construction method for the collapsed section of a bored pile, the method employing the aforementioned pile foundation construction device for the collapsed section of a bored pile, the method comprising the following steps:

[0017] S1: When detecting whether the injection hole has collapsed in real time, the support and the detection platform are placed at the bottom of the injection hole through the adjustment mechanism. When the collapse occurs inside the injection hole, the soil at the collapsed part falls onto the support, and the support then moves inside the detection platform and squeezes the pressure sensor.

[0018] S2: When the support moves inside the testing table, the sealing ring slides and rubs against the inner wall of the testing table, keeping the testing table in a sealed state.

[0019] S3: When the pressure sensor is squeezed, it will transmit a signal to the ground alarm device to remind the staff that a hole collapse has occurred. It can also detect the degree of hole wall collapse based on the pressure data transmitted back by the pressure sensor and formulate different repair plans.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. The pile foundation construction device and method for the collapsed part of the bored pile described in this invention, in order to detect whether the grouting hole has collapsed in real time, a support and a detection platform are placed at the bottom of the grouting hole through an adjustment mechanism. When the grouting hole collapses, the soil at the collapsed part falls onto the support. The support then moves in the detection platform and squeezes the pressure sensor. When the support moves in the detection platform, the sealing ring can prevent the liquid in the grouting hole from entering the platform, avoiding damage to the pressure sensor caused by the liquid. When the pressure sensor is squeezed, it will transmit a signal to the ground alarm device to remind the staff that the collapse has occurred. Furthermore, based on the pressure data returned by the pressure sensor, if the pressure data is small, it indicates a small-scale collapse; if the pressure data is large, it indicates a large-scale collapse. Different repair plans can be formulated accordingly.

[0022] 2. The pile foundation construction device and construction method for the collapsed part of the bored pile described in this invention may have a weakened sealing effect after long-term use. When the sealing effect of the sealing ring weakens and water enters the test platform, the waterproof membrane can temporarily prevent water from contacting the pressure sensor. After the test platform is removed from the grouting hole, the sealing ring should be replaced in time. Attached Figure Description

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] Figure 1 This is a perspective view of the entire invention;

[0025] Figure 2 This is a cross-sectional view of the foundation of the present invention;

[0026] Figure 3 This is an exploded view of the testing station of this invention;

[0027] Figure 4 This is a schematic diagram of the structure of the connecting platform of the present invention;

[0028] Figure 5 This is a cross-sectional view of the testing station of the present invention;

[0029] Figure 6 This is an enlarged view of the sleeve portion in this invention;

[0030] Figure 7 This is an enlarged view of the wiping component in this invention;

[0031] Figure 8 This is a flowchart of the method of the present invention.

[0032] In the diagram: 1. Foundation; 2. Casing; 3. Detection platform; 4. Support component; 5. Pressure sensor; 6. Annular groove; 7. Sealing ring; 8. Sleeve; 9. Support platform; 10. Take-up roller; 11. Take-up motor; 12. Steel cable; 13. Support wheel; 14. Connecting platform; 15. Sleeve; 16. Slide cylinder; 17. Connecting hole; 18. Movable rod; 19. Movable plate; 20. Fine hole; 21. Spring 1; 22. Mounting groove; 23. Electromagnet; 24. Spring 2; 25. Detection rod; 26. Roller; 27. Cavity; 28. Forward and reverse motor; 29. ​​Frustum; 30. Telescopic rod; 31. Push plate; 32. Wiping component. Detailed Implementation

[0033] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0034] Example 1

[0035] like Figures 1 to 6 As shown in the embodiment of the present invention, the pile foundation construction device for the collapsed part of the bored pile includes a foundation 1, a protective casing 2 inserted inside the foundation 1, a grouting hole opened inside the foundation 1, a support member 4 connected inside the grouting hole through an adjustment mechanism, an annular groove 6 opened on the surface of the support member 4, a detection platform 3 slidably connected to the inner wall of the annular groove 6, a sealing ring 7 fixedly installed on the surface of the support member 4, the side of the sealing ring 7 away from the support member 4 abutting against the inner wall of the detection platform 3, a pressure sensor 5 fixedly installed on the inner wall of the detection platform 3, the pressure sensor 5 being located directly below the support member 4, and the pressure sensor 5 being connected to a ground alarm device;

[0036] After the grouting holes for bridge piles are drilled, hole collapse may occur. The traditional method for detecting hole collapse is to place a sounding hammer into the hole. If the hammer cannot be pulled out from the ground or if the measured hole depth differs significantly from the original depth, a hole collapse is confirmed. However, this method cannot detect hole collapse in a timely manner, nor can it quickly assess the severity of the collapse or formulate a repair plan based on the severity. To detect hole collapse in real time, a support component 4 and a testing platform 3 are placed at the bottom of the hole using an adjustment mechanism. When a hole collapse occurs inside the hole... When the soil at the collapsed area falls onto the support 4, the support 4 then moves within the testing platform 3 and squeezes the pressure sensor. As the support 4 moves within the testing platform 3, the sealing ring 7 prevents liquid from the injection hole from entering the platform, thus avoiding damage to the pressure sensor 5. When the pressure sensor 5 is squeezed, it will transmit a signal to the ground alarm device to alert the staff that a collapsed area has occurred. Furthermore, based on the pressure data transmitted back by the pressure sensor 5, it can be determined whether the pressure data is low (small-scale collapse) or high (large-scale collapse), and different repair plans can be formulated accordingly.

[0037] The pressure sensor 5 is covered with a waterproof membrane, which is elastic. The sealing ring 7 may weaken after long-term use. When the sealing effect of the sealing ring 7 weakens and water enters the detection platform 3, the waterproof membrane can temporarily prevent water from contacting the pressure sensor 5. The sealing ring 7 should be replaced in time after the detection platform 3 is removed from the injection hole.

[0038] The adjusting mechanism includes a sleeve 8, which is fitted onto the surface of the sleeve 2. A support platform 9 is fixedly mounted on the surface of the sleeve 8. A take-up roller 10 is rotatably mounted on the surface of the support platform 9. A take-up motor 11 is fixedly mounted on the surface of the support platform 9. The output shaft of the take-up motor 11 is fixedly connected to the surface of the take-up roller 10. A steel cable 12 is fixedly connected to the surface of the take-up roller 10. A connecting platform 14 is fixedly mounted at the other end of the steel cable 12. A support member 4 is fixedly mounted on the lower surface of the connecting platform 14. A support wheel 13 is fixedly mounted on the surface of the sleeve 8. The surface abuts against the steel cable 12; after placing the support 4 and the testing platform 3 into the injection hole, the ferrule 8 is clamped onto the protective sleeve 2, and then the winding motor 11 is started. The winding motor 11 drives the winding roller 10 to rotate, releasing the wound steel cable 12. Then the support 4 and the testing platform 3 move towards the bottom of the injection hole, thereby achieving the effect of placing the support 4 and the testing platform 3 into injection holes of different depths. After use, the winding motor 11 is reversed, and the winding motor 11 and the winding roller 10 cooperate to wind up the steel cable 12. The support wheel 13 can assist in the winding and releasing of the steel cable 12, avoiding excessive friction between the steel cable 12 and the ferrule 8.

[0039] The inner wall of the testing platform 3 is fixedly installed with a sleeve 15, and a sliding cylinder 16 is slidably and sealingly installed on the inner wall of the sleeve 15. The upper surface of the sliding cylinder 16 is fixedly connected to the lower surface of the support 4. A connecting hole 17 is opened on the surface of the sliding cylinder 16. A set of movable rods 18 is fixedly installed on the lower surface of the sliding cylinder 16. A movable piece 19 is slidably installed on the surface of the movable rods 18. A spring 21 is fixedly installed on the surface of the movable rods 18. The other end of the spring 21 is fixedly connected to the surface of the movable piece 19. A fine hole 20 is opened on the surface of the movable piece 19. The diameter of the fine hole 20 is smaller than that of the connecting hole 17. The movable piece 19 is in contact with the lower surface of the sliding cylinder 16.

[0040] When the hole collapses, a large amount of soil falls onto the support 4. When the support 4 is hit by a large amount of soil, it causes the slide cylinder 16 to move into the sleeve 15. Because the spring 21 causes the movable plate 19 to abut against the surface of the slide cylinder 16, the air in the sleeve 15 enters the slide cylinder 16 through the fine hole 20. Because the diameter of the fine hole 20 is small, it acts as a damping force, so the support 4 will slowly squeeze towards the pressure sensor 5, preventing the soil from hitting the support 4 and causing it to quickly collide with the pressure sensor 5, which would damage the pressure sensor 5. While protecting the pressure sensor 5, it will not affect the pressure sensor 5's pressure reading. When the support 4 needs to be reset, the air in the slide cylinder 16 enters the sleeve 15 through the connecting hole 17. The air will drive the movable plate 19 to move and squeeze the spring. When the movable plate 19 moves and releases the constraint on the connecting hole 17, the air can enter the sleeve 15 through the larger diameter connecting hole 17, thereby allowing the support 4 to quickly reset.

[0041] The detection platform 3 has an internal mounting groove 22. An electromagnet 23 is fixedly installed on the inner wall of the mounting groove 22. A set of springs 24 is fixedly installed on the surface of the electromagnet 23. A detection rod 25 is fixedly installed on the other end of the springs 24. The detection rod 25 is made of magnet. When the electromagnet 23 is energized, it repels the detection rod 25. When a small-scale hole collapse occurs, the electromagnet 23 is energized. The electromagnet 23 generates magnetism and repels the detection rod 25. The detection rod 25 then moves and stretches the springs 24. After moving, the detection rod 25 pops out of the detection platform 3 and abuts against the inner wall of the injection hole. At this time, the adjustment mechanism is activated to drive the detection platform 3 to move slowly upward. When the detection platform 3 moves to the collapsed hole, the detection rod 25 will insert into the collapsed hole. Then the detection platform 3 can no longer move upward, thus clearly knowing the location of the collapsed hole and facilitating the filling of the collapsed hole.

[0042] The detection rod 25 has a groove at the end away from the spring, and a roller 26 is rotatably mounted on the inner wall of the groove. After the detection rod 25 is ejected into the monitoring platform, the roller 26 abuts against the inner wall of the injection hole and rotates when the detection rod 25 moves up and down, thereby reducing the friction of the detection rod 25 during movement and facilitating the movement of the monitoring platform 3.

[0043] The connecting platform 14 is equipped with a set of telescopic rods 30, and a push plate 31 is fixedly installed at the output end of the telescopic rods 30. After determining the location of the collapsed hole, the electromagnet 23 is turned off, and the spring 24 pulls the detection rod 25 back into the detection platform 3. The adjustment mechanism drives the detection platform 3 to move downward a short distance (i.e., the distance between the middle of the push plate 31 and the mounting groove 22) so that the connecting platform 14 is flush with the collapsed hole. Then, the telescopic rods 30 are activated, and the telescopic rods 30 drive the push plate 31 to reciprocate, pushing the soil on the support 4 towards the collapsed hole to fill it and complete the collapsed hole.

[0044] The connecting platform 14 has a cavity 27 inside, and a forward and reverse motor 28 is fixedly installed on the inner wall of the cavity 27. A frustum 29 is fixedly installed on the output end of the forward and reverse motor 28. A set of telescopic rods 30 are fixedly connected to the surface of the frustum 29. The telescopic rods 30 extend and then shorten. Then the forward and reverse motor 28 drives the telescopic rods 30 to rotate a certain angle. Then the telescopic rods 30 extend and shorten again. The forward and reverse motor 28 drives the telescopic rods 30 to rotate in the opposite direction a certain angle, so that the position of the pusher plate 31 changes from before. By repeating this process several times, the blind zone between the pushers 31 can be reduced, and the filling effect can be improved.

[0045] Example 2

[0046] like Figure 7 As shown in the first embodiment, another embodiment of the present invention is as follows: a wiping member 32 is fixedly installed on the inner wall of the sleeve 8. The wiping member 32 is made of rubber. When the adjusting mechanism drives the winding roller 10 to wind up the steel cable 12, the wiping member 32 scrapes off the water and impurities on the surface of the steel cable 12, thereby cleaning the steel cable 12 and preventing water stains and impurities from remaining on the surface of the steel cable 12 after winding, which would cause the steel cable 12 to rust.

[0047] like Figure 8 As shown, a pile foundation construction method for the collapsed section of a bored pile is described. This method employs the aforementioned pile foundation construction device for the collapsed section of a bored pile, and includes the following steps:

[0048] S1: When detecting whether the injection hole has collapsed in real time, the support 4 and the detection platform 3 are placed at the bottom of the injection hole through the adjustment mechanism. When the collapse occurs inside the injection hole, the soil at the collapsed part falls onto the support 4, and the support 4 then moves inside the detection platform 3 and squeezes the pressure sensor 5.

[0049] S2: When the support 4 moves inside the testing table 3, the sealing ring 7 slides and rubs against the inner wall of the testing table 3, so that the testing table 3 is in a sealed state.

[0050] S3: When pressure sensor 5 is squeezed, it will transmit a signal to the ground alarm device to remind the staff that a hole collapse has occurred. It can also detect the degree of hole wall collapse based on the pressure data transmitted back by pressure sensor 5 and formulate different repair plans.

[0051] Working principle: The support 4 and the testing platform 3 are placed at the bottom of the injection hole through the adjustment mechanism. When a collapse occurs inside the injection hole, the soil in the collapsed area falls onto the support 4. The support 4 then moves within the testing platform 3 and squeezes the pressure sensor. When the support 4 moves within the testing platform 3, the sealing ring 7 prevents liquid from the injection hole from entering the platform, thus avoiding damage to the pressure sensor 5. When the pressure sensor 5 is squeezed, it transmits a signal to the ground alarm device to alert the staff of the collapse. Based on the pressure data returned by the pressure sensor 5, a smaller pressure indicates a small-scale collapse, while a larger pressure indicates a large-scale collapse, allowing for different repair plans. The sealing ring 7 may experience a weakening of its sealing effect after prolonged use. When the sealing effect weakens and water enters the test station 3, the waterproof membrane can temporarily prevent water from contacting the pressure sensor 5. After the test station 3 is removed from the injection hole, the sealing ring 7 should be replaced in time. After the support 4 and the test station 3 are placed into the injection hole, the ferrule 8 is clamped onto the protective sleeve 2. Then the winding motor 11 is started. The winding motor 11 drives the winding roller 10 to rotate and release the wound steel cable 12. Then the support 4 and the test station 3 move towards the bottom of the injection hole, thereby achieving the effect of placing the support 4 and the test station 3 into injection holes of different depths. After use, the winding motor 11 is reversed. The winding motor 11 and the winding roller 10 cooperate to wind up the steel cable 12. The support wheel 13 can assist in the winding and release of the steel cable 12 and avoid excessive friction between the steel cable 12 and the ferrule 8.

[0052] When the hole collapses, a large amount of soil falls onto the support 4. When the support 4 is impacted by this soil, it causes the slide cylinder 16 to move into the sleeve 15. Because the spring 21 causes the movable plate 19 to abut against the surface of the slide cylinder 16, air inside the sleeve 15 enters the slide cylinder 16 through the fine hole 20. Since the fine hole 20 has a small diameter, it acts as a damping mechanism, causing the support 4 to slowly compress towards the pressure sensor 5. This prevents the soil from impacting the support 4 and causing it to quickly collide with the pressure sensor 5, thus protecting it from damage. While protecting the pressure sensor 5, this also ensures that the pressure sensor 5 can read the pressure. When the support 4 needs to reset, the air inside the slide cylinder 16 enters the sleeve 15 through the connecting hole 17. The air then causes the movable plate 19 to move and compress the spring. When the movable plate 19 releases its restraint on the connecting hole 17, the air... The probe can enter the sleeve 15 through the larger diameter connecting hole 17, allowing the support 4 to quickly reset. When a small-scale hole collapse occurs, the electromagnet 23 is energized. The energized electromagnet 23 generates magnetism and repels the detection rod 25. The detection rod 25 then moves and stretches the spring 24. After moving, the detection rod 25 pops out into the detection platform 3 and abuts against the inner wall of the injection hole. At this time, the adjustment mechanism is activated to drive the detection platform 3 to move slowly upward. When the detection platform 3 moves to the collapsed hole, the detection rod 25 will insert into the collapsed hole. Then the detection platform 3 can no longer move upward, thus clearly knowing the location of the hole collapse and facilitating the filling of the collapsed hole. After the detection rod 25 pops out into the monitoring platform, the roller 26 abuts against the inner wall of the injection hole and rotates when the detection rod 25 moves up and down, thereby reducing the friction of the detection rod 25 during movement and facilitating the movement of the detection platform 3.

[0053] After determining the location of the collapsed hole, spring 24 pulls the detection rod 25 back into the detection platform 3. The adjustment mechanism then moves the detection platform 3 downwards a short distance (the distance between the middle of the push plate 31 and the mounting groove 22) until the connecting platform 14 is flush with the collapsed hole. Then, the telescopic rod 30 is activated, causing the push plate 31 to reciprocate, pushing the soil on the support 4 towards the collapsed hole to fill it and complete the hole. The telescopic rod 30 extends and then retracts, and then the forward / reverse motor 28 rotates the telescopic rod 30 a certain distance. The angle is adjusted, and then the telescopic rod 30 extends and shortens again. The forward and reverse motor 28 drives the telescopic rod 30 to rotate in the opposite direction by a certain angle, so that the position of the pusher plate 31 changes from before. By repeating this process several times, the blind zone between each pusher plate 31 can be reduced, and the filling effect can be improved. When the adjustment mechanism drives the winding roller 10 to wind up the steel cable 12, the wiping component 32 scrapes off the water and impurities on the surface of the steel cable 12, thereby cleaning the steel cable 12 and preventing water stains and impurities from remaining on the surface of the steel cable 12 after winding, which would cause the steel cable 12 to rust.

[0054] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0055] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pile foundation construction device for the collapsed section of a bored cast-in-place pile, characterized in that: The system includes a foundation (1), a protective sleeve (2) inserted inside the foundation (1), an injection hole opened inside the foundation (1), a support member (4) connected inside the injection hole through an adjustment mechanism, an annular groove (6) opened on the surface of the support member (4), a detection platform (3) slidably connected to the inner wall of the annular groove (6), a sealing ring (7) fixedly installed on the surface of the support member (4), the side of the sealing ring (7) away from the support member (4) abutting against the inner wall of the detection platform (3), a pressure sensor (5) fixedly installed on the inner wall of the detection platform (3), the pressure sensor (5) is located directly below the support member (4), and the pressure sensor (5) is connected to a ground alarm device. The adjustment mechanism includes a sleeve (8), which is fitted onto the surface of the sleeve (2). A support platform (9) is fixedly installed on the surface of the sleeve (8). A take-up roller (10) is rotatably installed on the surface of the support platform (9). A take-up motor (11) is fixedly installed on the surface of the support platform (9). The output shaft of the take-up motor (11) is fixedly connected to the surface of the take-up roller (10). A steel cable (12) is fixedly connected to the surface of the take-up roller (10). A connecting platform (14) is fixedly installed at the other end of the steel cable (12). A support member (4) is fixedly installed on the lower surface of the connecting platform (14). A support wheel (13) is fixedly installed on the surface of the sleeve (8). The surface of the support wheel (13) abuts against the steel cable (12). The testing platform (3) has an installation slot (22) inside. An electromagnet (23) is fixedly installed on the inner wall of the installation slot (22). A set of springs (24) is fixedly installed on the surface of the electromagnet (23). A testing rod (25) is fixedly installed on the other end of the springs (24). The testing rod (25) is made of magnet. When the electromagnet (23) is energized, it repels the testing rod (25). The connecting platform (14) is equipped with a set of telescopic rods (30), and a push plate (31) is fixedly installed at the output end of the telescopic rods (30).

2. The pile foundation construction device for the collapsed section of a bored pile according to claim 1, characterized in that: The surface of the pressure sensor (5) is covered with a waterproof membrane, which is elastic.

3. The pile foundation construction device for the collapsed section of a bored pile according to claim 1, characterized in that: A sleeve (15) is fixedly installed on the inner wall of the testing platform (3). A slide cylinder (16) is slidably sealed on the inner wall of the sleeve (15). The upper surface of the slide cylinder (16) is fixedly connected to the lower surface of the support (4). A connecting hole (17) is opened on the surface of the slide cylinder (16). A set of movable rods (18) is fixedly installed on the lower surface of the slide cylinder (16). A movable piece (19) is slidably installed on the surface of the movable rods (18). A spring (21) is fixedly installed on the surface of the movable rods (18). The other end of the spring (21) is fixedly connected to the surface of the movable piece (19). A fine hole (20) is opened on the surface of the movable piece (19). The diameter of the fine hole (20) is smaller than that of the connecting hole (17). The movable piece (19) is in contact with the lower surface of the slide cylinder (16).

4. The pile foundation construction device for the collapsed section of a bored pile according to claim 3, characterized in that: The detection rod (25) has a groove at the end away from the spring, and a roller (26) is rotatably mounted on the inner wall of the groove.

5. The pile foundation construction device for the collapsed section of a bored pile according to claim 4, characterized in that: The connecting platform (14) has a cavity (27) inside. A forward and reverse motor (28) is fixedly installed on the inner wall of the cavity (27). A frustum (29) is fixedly installed at the output end of the forward and reverse motor (28). A set of telescopic rods (30) is fixedly connected to the surface of the frustum (29).

6. The pile foundation construction device for the collapsed section of a bored pile according to claim 5, characterized in that: The inner wall of the sleeve (8) is fixedly installed with a wiping element (32), which is made of rubber.

7. A pile foundation construction method for the collapsed section of a bored cast-in-place pile, the method employing the pile foundation construction device for the collapsed section of a bored cast-in-place pile as described in any one of claims 1-6, characterized in that: The method includes the following steps: S1: When detecting whether the injection hole has collapsed in real time, the support (4) and the detection platform (3) are placed at the bottom of the injection hole through the adjustment mechanism. When the injection hole collapses, the soil in the collapsed part falls onto the support (4), and the support (4) moves in the detection platform (3) and squeezes the pressure sensor (5). S2: When the support (4) moves inside the test bench (3), the sealing ring (7) slides and rubs against the inner wall of the test bench (3), so that the test bench (3) is in a sealed state. S3: When the pressure sensor (5) is squeezed, it will transmit a signal to the ground alarm device to remind the staff that the hole collapse has occurred. It can also detect the degree of collapse of the hole wall based on the pressure data transmitted back by the pressure sensor (5) and formulate different repair plans.

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