Pile foundation bearing reinforcing device for karst cave construction

Abstract

The invention belongs to the technical field of pile foundations, and particularly relates to a pile foundation bearing reinforcing device for karst cave construction, which comprises two annular plates which are oppositely arranged; a plurality of connecting bolts are in threaded connection between the two annular plates; the inner wall of the annular plate is in threaded connection with a first threaded rod; by means of multi-stage adjustment and stable supporting measures, bearing reinforcement of pile foundations of different models can be adapted, efficient and reliable bearing reinforcement is achieved in a narrow karst cave in a threaded adjustment and insertion fixing mode, pile end stress is effectively dispersed by means of the multi-layer supporting mode, the local crushing risk of a karst cave top plate is relieved, and the stability of the karst cave top plate is improved. And the hole forming accident rate in the construction process is obviously reduced, so that the bearing capacity and stability of the pile foundation in the karst cave are improved, the construction steps are simplified, the use of various types of accessories is reduced, and the confusion of the construction environment is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of pile foundations, and specifically relates to a pile foundation bearing strengthening device for karst cave construction. Background Art

[0002] When carrying out pile foundation construction under karst cave geological conditions, in order to ensure the bearing capacity and stability of the pile foundation, special bearing strengthening devices are often used. Such devices mainly solve problems such as pile tip collapse and insufficient side friction resistance caused by karst caves through means such as structural strengthening, grouting reinforcement, and intelligent monitoring.

[0003] A Chinese patent with the publication number CN220725212U discloses a pile foundation stabilizing device, including a pile foundation, and a stabilizing sleeve is arranged on the pile foundation. In this application, several stabilizing sleeves are arranged to pull each other, making the pile foundation have higher stability, and steel plates and rigid connections are used, making the rigidity of this pile foundation stabilizing device higher and enabling it to be more stable and durable.

[0004] Due to the ever-changing internal environment of karst caves and the existence of different geological conditions and spatial limitations in the caves, the construction difficulty is greatly increased. The use of pile foundation stabilizing devices is crucial for ensuring the bearing effect of pile foundations. In karst cave construction, although traditional pile foundation stabilizing devices can effectively enhance the bearing capacity of pile foundations, it is difficult to achieve matching installation in the face of different pile foundation sizes in karst caves. This means that during the construction process, each pile foundation needs to select a corresponding model of bearing strengthening device for assembly according to its specific size. This process is both time-consuming and complex, and the restricted construction environment and complex assembly are likely to seriously affect the construction efficiency.

[0005] Therefore, the present invention provides a pile foundation bearing strengthening device for karst cave construction. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: A pile foundation bearing strengthening device for karst cave construction according to the present invention includes two ring plates, and the two ring plates are arranged opposite to each other; a plurality of connecting bolts are threadedly connected between the two ring plates; a first threaded rod is threadedly connected to the inner wall of the ring plate; a first fitting plate is slidably connected to the inner wall of the ring plate, and one side of the first fitting plate is rotatably connected to one end of the first threaded rod. The other side of the first fitting plate away from the first threaded rod is V-shaped; the end of the first threaded rod away from the first fitting plate is rotatably connected to a connecting block; a ground fixing component is arranged on the connecting block, and the ground fixing component is used for ground fixing and supporting the connecting block.

[0008] Preferably, the ground fixing assembly includes a first sliding frame, a first bolt, and a first support plate; the two first sliding frames are slidably connected to the connecting block, and a plurality of jacks are provided on the first sliding frame; the first bolt passes through the jack and is threadedly connected to the connecting block; the first support plate is fixedly connected to the bottom ends of the two first sliding frames.

[0009] Preferably, two first insertion rods are fixedly connected to the bottom end of the first support plate; the bottom ends of the two first insertion rods are conical.

[0010] Preferably, a sliding block is slidably connected between the two first sliding frames; both inner walls of the sliding block are slidably connected to a limiting rod through an elastic member; a connecting frame is fixedly connected to one side of the sliding block away from the first fitting plate; a plugging assembly is provided on the connecting frame, and the plugging assembly is used to assist in fixing and supporting the first sliding frame.

[0011] Preferably, the plugging assembly includes a second sliding frame, a second bolt, a second support plate, and a second insertion rod; the second sliding frame is slidably connected to the connecting frame; the second bolt passes through the second sliding frame and is threadedly connected to the connecting frame; the second support plate is fixedly connected to the bottom end of the second sliding frame; a plurality of second insertion rods are fixedly connected to the bottom end of the second support plate, and the bottom ends of the second insertion rods are conical.

[0012] Preferably, fixing frames are fixedly connected to both the top and bottom of the first fitting plate; a second fitting plate is fixedly connected to the outer walls of the two fixing frames; a matching assembly is provided on the first sliding frame, and the matching assembly is used to support the second fitting plate to strengthen the bearing capacity of the pile foundation.

[0013] Preferably, the matching assembly includes a matching frame and a second threaded rod; the matching frame is slidably connected to the outer wall of the first sliding frame; the matching frame is slidably connected to the outer walls of the two first sliding frames; the second threaded rod is rotatably connected to one side of the matching frame away from the first sliding frame, and the second threaded rod is threadedly connected to the inner wall of the fixing frame.

[0014] Preferably, a short rod is fixedly connected to the middle of the connecting block; a turntable is rotatably connected to the short rod; a support frame is fixedly connected to the turntable.

[0015] Preferably, a plurality of limiting holes are provided on the turntable, and the diameter of the limiting holes corresponds to the diameter of the first bolt.

[0016] Preferably, wall fixing screws are threadedly connected to both inner walls of the support frame; the ends of the wall fixing screws away from the turntable are conical.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. A pile foundation bearing strengthening device for karst cave construction strengthens the bearing and support of different types of pile foundations in karst caves through two ring plates and a ground fixing component. The two ring plates are used to be spliced on the outer wall of the pile foundation through connecting bolts. The threaded rod and the first fitting plate cooperate to adjust and clamp and fix the pile foundation. The second support plate and the first sliding frame cooperate to enhance the stability of the device for the second time. The insertion component increases the soil penetration stability and adaptability of the ground fixing component, and can adapt to assembly in different geological environments. Through multi-level adjustment and stable support measures, it can adapt to the bearing strengthening of different types of pile foundations, and through the methods of threaded adjustment and insertion fixation, it can achieve efficient and reliable bearing strengthening in a narrow karst cave. This multi-level support method effectively disperses the pile tip stress, alleviates the risk of local crushing of the karst cave roof, significantly reduces the hole-forming accident rate during construction, thereby improving the bearing capacity and stability of the pile foundation in the karst cave, simplifies the construction steps, reduces the use of various types of accessories, and avoids the chaos of the construction environment.

[0019] 2. A pile foundation bearing strengthening device for karst cave construction adjusts the support angle in a narrow karst cave through the provided disc and support frame to provide additional support. The two wall fixing screw rods can be drilled into the inner wall of the karst cave when necessary to ensure the stability of each part of the device. The second fitting plate and the cooperation frame assist in supporting the pile foundation to improve the stability of the bearing strengthening of the pile foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the drawings.

[0021] Figure 1 is a perspective view of the present invention;

[0022] Figure 2 is a schematic structural view of the cooperation connection of the two ring plates in the present invention;

[0023] Figure 3 is a schematic structural view of the first fitting plate in the present invention;

[0024] Figure 4 is a schematic structural view of the wall fixing screw rod in the present invention;

[0025] Figure 5 is a schematic structural view of the second support plate in the present invention;

[0026] Figure 6 is a schematic structural view of the second threaded rod in the present invention.

[0027] In the figure: 1. Ring plate; 11. Connecting bolt; 12. First threaded rod; 13. First fitting plate; 14. Connecting block; 2. First sliding frame; 21. First bolt; 22. First support plate; 3. First inserting rod; 4. Sliding block; 41. Limiting rod; 42. Connecting frame; 5. Second sliding frame; 51. Second bolt; 52. Second support plate; 53. Second inserting rod; 6. Fixed frame; 61. Second fitting plate; 7. Fitting frame; 71. Second threaded rod; 8. Short rod; 81. Disk; 82. Support frame; 9. Wall fixing screw. Specific implementation manner

[0028] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0029] As Figures 1 to 4 , Figure 6 shown, a pile foundation bearing strengthening device for karst cave construction described in an embodiment of the present invention includes two ring plates 1, and the two ring plates 1 are arranged oppositely; a plurality of connecting bolts 11 are threadedly connected between the two ring plates 1; the inner wall of the ring plate 1 is threadedly connected with a first threaded rod 12; the inner wall of the ring plate 1 is slidably connected with a first fitting plate 13, and one side of the first fitting plate 13 is rotatably connected to one end of the first threaded rod 12, and the other side of the first fitting plate 13 away from the first threaded rod 12 is V-shaped; the end of the first threaded rod 12 away from the first fitting plate 13 is rotatably connected to a connecting block 14; a ground fixing assembly is arranged on the connecting block 14, and the ground fixing assembly is used for ground fixing and supporting the connecting block 14; when using the bearing strengthening device for stable construction of different types of pile foundations in a karst cave, the two ring plates 1 are sleeved and fixed on the outer wall of the pile foundation through the connecting bolts 11. After the two ring plates 1 are spliced, the spliced diameter is usually larger than the diameter of the pile foundation. The two groups of ground fixing assemblies are fixed on both sides of the pile foundation, and the connecting block 14 installed on the ground fixing assembly is connected to the first threaded rod 12. The first threaded rod 12 is rotated according to the type of the pile foundation. The first threaded rod 12 rotates on one side of the connecting block 14 and is in threaded cooperation with the inner wall of the ring plate 1, so as to adjust the position of the first fitting plate 13. The first fitting plate 13 slides on the inner wall of the ring plate 1 until it fits on the outer wall of the pile foundation. The opposite V-shaped outer walls of the two first fitting plates 13 clamp and fix the outer wall of the pile foundation, and cooperate with the ground fixing assembly to carry out stable support for different types of pile foundations. The pile end stress is dispersed through the support method, avoiding local crushing of the karst cave roof, relieving stress concentration, and having a relatively fast construction efficiency. Due to the addition of the support structure to provide auxiliary support, the accident rate of hole forming is directly reduced, thereby strengthening the bearing capacity of different types of pile foundations, improving the stability of the pile foundation in the karst cave, and at the same time being able to adapt to different types of pile foundations for bearing strengthening, reducing the occurrence of the situation where a variety of accessories of different types enter the restricted karst cave and cause chaos in the construction environment.

[0030] The ground fixing component includes a first sliding frame 2, a first bolt 21 and a first support plate 22; the two first sliding frames 2 are slidably connected to the connecting block 14, and a plurality of jacks are provided on the first sliding frame 2; the first bolt 21 passes through the jacks and is threadedly connected to the connecting block 14; the first support plate 22 is fixedly connected to the bottom ends of the two first sliding frames 2; when strengthening the bearing capacity of different types of pile foundations in the karst cave, the two first support plates 22 are respectively placed on both sides of the pile foundation, two first sliding frames 2 are fixed on each first support plate 22, the connecting block 14 can slide on the two first sliding frames 2, after the two connecting bolts 11 are spliced, the first bolt 21 passes through the jacks of the two first sliding frames 2 and is threadedly fixed on the connecting block 14 to form two groups of ground fixing components, and the two groups of ground fixing components can respectively stably support the two ring plates 1, thereby improving the bearing strengthening effect on the pile foundation.

[0031] Two first inserting rods 3 are fixedly connected to the bottom end of the first support plate 22; the bottom ends of the two first inserting rods 3 are conical; when the first support plate 22 supports on the ground of the karst cave, the two first inserting rods 3 are fixed to the bottom end of the first support plate 22, and the conical ends of the two first inserting rods 3 are inserted into the karst cave formation. The conical ends can improve the insertion efficiency of the first inserting rods 3 into the soil. The two first inserting rods 3 penetrate deep into the karst cave formation, improving the support effect of the ground fixing component, and further enhancing the bearing effect of the pile foundation.

[0032] As Figures 1 to 6 As shown, a sliding block 4 is slidably connected between the two first sliding frames 2; the inner walls on both sides of the sliding block 4 are slidably connected with limiting rods 41 through elastic members; a connecting frame 42 is fixedly connected to the side of the sliding block 4 away from the first fitting plate 13; a plugging component is arranged on the connecting frame 42, and the plugging component is used to assist in fixing and supporting the first sliding frame 2; when the two first sliding frames 2 support the ring plate 1 connected by the connecting block 14, the sliding block 4 is used to slide between the two first sliding frames 2, and according to different geological environments in the karst cave, the position of the sliding block 4 is adjusted, and the two limiting rods 41 are squeezed into the jacks of the two first sliding frames 2 for limiting under the elastic force of the elastic members, and the plugging component connected by the connecting frame 42 is used to assist in supporting the first sliding frame 2, thereby improving the stability of strengthening the bearing capacity of the pile foundation.

[0033] As Figures 1 to 3 、 Figure 5As shown, the plugging component includes a second sliding frame 5, a second bolt 51, a second support plate 52, and a second plugging rod 53; the second sliding frame 5 is slidably connected to the connecting frame 42; the second bolt 51 passes through the second sliding frame 5 and is threadedly connected to the connecting frame 42; the second support plate 52 is fixedly connected to the bottom end of the second sliding frame 5; a plurality of the second plugging rods 53 are fixedly connected to the bottom end of the second support plate 52, and the bottom end of the second plugging rod 53 is conically arranged; when auxiliary support is provided at the first sliding frame 2, a plurality of the second plugging rods 53 at the bottom end of the second support plate 52 are first inserted into the karst formation, and the plurality of second plugging rods 53 improve the adaptability of the second support plate 52 to different geological conditions in the karst cave. The position of the second sliding frame 5 is adaptively adjusted according to the unevenness of the ground. Subsequently, the second bolt 51 is used to pass through the second sliding frame 5 and is threadedly connected to the connecting frame 42 for fixation, achieving the effect of auxiliary support at the first sliding frame 2.

[0034] As Figures 1 to 4 , Figure 6 shown, fixing frames 6 are fixedly connected to both the top and bottom of the first fitting plate 13; second fitting plates 61 are fixedly connected to the outer walls of the two fixing frames 6; a matching component is arranged on the first sliding frame 2, and the matching component is used to support the second fitting plate 61 to strengthen the pile foundation bearing; when strengthening the bearing of different types of pile foundations, the fixing frames 6 are respectively connected and supported by using the top and bottom of the first fitting plate 13, and the two second fitting plates 61 are connected to the top and bottom of the first fitting plate 13. As the first threaded rod 12 rotates to adjust the position of the first fitting plate 13, the two second fitting plates 61 synchronously follow the adjustment to fit the outer wall of the pile foundation. The sides of the two second fitting plates 61 close to the pile foundation are also V-shaped. The two second fitting plates 61 synchronously fit the outer wall of the pile foundation, and rely on the matching component to support the second fitting plate 61, thereby improving the effect of strengthening the bearing of the pile foundation.

[0035] The matching component includes a matching frame 7 and a second threaded rod 71; the matching frame 7 is slidably connected to the outer wall of the first sliding frame 2; the matching frame 7 is slidably connected to the outer walls of the two first sliding frames 2; the second threaded rod 71 is rotatably connected to the side of the matching frame 7 away from the first sliding frame 2, and the second threaded rod 71 is threadedly connected to the inner wall of the fixing frame 6; when the second fitting plate 61 supports different types of pile foundations, the matching frame 7 is used to slide on the outer walls of the two first sliding frames 2 and connect the second threaded rod 71. The second threaded rod 71 synchronously performs threaded adjustment following the first threaded rod 12. After the adjustment is completed, the matching frame 7 cooperates with the second threaded rod 71 to support the fixing frame 6, enabling the second fitting plate 61 to have a support point when supporting different types of pile foundations, improving the support effect on the pile foundation.

[0036] A short rod 8 is fixedly connected to the connection block 14 and located in the middle; a turntable 81 is rotatably connected to the short rod 8; a support frame 82 is fixedly connected to the turntable 81; when strengthening the load-bearing in a narrow karst cave, the support angle of the support frame 82 is adjusted on the short rod 8 by rotating the turntable 81, so that the end of the support frame 82 away from the turntable 81 closely fits the inner wall of the karst cave. After fixing the turntable 81, a support point is formed between the support frame 82 and the inner wall of the karst cave, which is convenient for strengthening the load-bearing by using natural conditions in a narrow karst cave, not only reducing the use of accessories, but also improving the support load-bearing effect on the pile foundation.

[0037] A plurality of limiting holes are formed in the turntable 81, and the diameter of the limiting holes corresponds to the diameter of the first bolt 21; when using the support frame 82 to cooperate with the inner wall of the karst cave for support, first adjust the position of the support frame 82, fit the support frame 82 on the inner wall of the karst cave for support, and then use the first bolt 21 to pass through the limiting holes and jack holes of the turntable 81 and be threadedly connected to the connection block 14, which can synchronously fix the positions of the connection block 14 and the support frame 82 on the turntable 81, and further realize the effect of strengthening the load-bearing by the cooperation of the support frame 82 and the inner wall of the karst cave.

[0038] Wall fixing screws 9 are threadedly connected to the inner walls on both sides of the support frame 82; the ends of the wall fixing screws 9 away from the turntable 81 are conical; when the support frame 82 is difficult to reach the inner wall of the karst cave and loses the support effect, drill holes in advance according to the situation required. If no drilling is required, use the conical ends of the two wall fixing screws 9 to be threadedly drilled into the inner wall of the karst cave. The two wall fixing screws 9 are used as the connection between the support frame 82 and the inner wall of the karst cave, so as to ensure the support stability at the support frame 82 and improve the adaptability of the use of the support frame 82.

[0039] Working process: When using the bearing reinforcement device for the stable construction of pile foundations of different models in the karst cave, two ring plates 1 are sleeved and fixed on the outer wall of the pile foundation through connecting bolts 11. After the two ring plates 1 are spliced, the spliced diameter is usually larger than the diameter of the pile foundation. Two groups of ground fixing components are fixed on both sides of the pile foundation. The connecting blocks 14 installed on the ground fixing components are connected to the first threaded rods 12. The first threaded rods 12 are rotated according to the different models of the pile foundation. The first threaded rods 12 rotate on one side of the connecting blocks 14 and are in threaded cooperation with the inner wall of the ring plates 1, so as to adjust the position of the first fitting plates 13. The first fitting plates 13 slide on the inner wall of the ring plates 1 until they fit on the outer wall of the pile foundation. The V-shaped outer walls of the two first fitting plates 13 facing each other clamp and fix the outer wall of the pile foundation, cooperate with the ground fixing components to carry out stable support for pile foundations of different models, disperse the pile end stress through the support method, avoid local crushing of the karst cave roof, relieve the stress concentration, and the construction efficiency is relatively high. Due to the addition of the support structure to provide auxiliary support, the hole-forming accident rate is directly reduced, thereby strengthening the bearing capacity of pile foundations of different models, improving the stability of pile foundations in the karst cave. At the same time, it can be adapted to pile foundations of different models for bearing reinforcement, reducing the occurrence of the situation that various types of accessories enter the restricted karst cave and cause chaos in the construction environment; when carrying out bearing reinforcement for pile foundations of different models in the karst cave, two first support plates 22 are respectively placed on both sides of the pile foundation. Two first sliding frames 2 are fixed on each first support plate 22. The connecting blocks 14 can slide on the two first sliding frames 2. After the two connecting bolts 11 are spliced, the first bolts 21 are used to penetrate the insertion holes of the two first sliding frames 2 and are threadedly fixed on the connecting blocks 14 to form two groups of ground fixing components. The two groups of ground fixing components can respectively stably support the two ring plates 1, thereby improving the bearing reinforcement effect on the pile foundation; when the first support plate 22 supports on the karst cave ground, two first insertion rods 3 are fixed at the bottom end of the first support plate 22. The conical ends of the two first insertion rods 3 are inserted into the karst cave stratum. The conical ends can improve the insertion efficiency of the first insertion rods 3 into the soil. The two first insertion rods 3 penetrate deep into the karst cave stratum, improve the support effect of the ground fixing components, and thus enhance the bearing effect of the pile foundation;

[0040] When the two first sliding frames 2 support the ring plate 1 connected to the connecting block 14, the sliding block 4 slides between the two first sliding frames 2. According to different geological environments in the karst cave, the position of the sliding block 4 is adjusted, and the two limiting rods 41 are squeezed into the jacks of the two first sliding frames 2 under the elastic force of the elastic member for limiting. The plug-in assembly connected by the connecting frame 42 is used to assist in supporting the first sliding frame 2, thereby improving the stability of the pile foundation load strengthening; when assisting in supporting the first sliding frame 2, multiple second plug-in rods 53 at the bottom end of the second support plate 52 are first inserted into the karst cave formation. The multiple second plug-in rods 53 improve the adaptability of the second support plate 52 to different geological conditions in the karst cave. The position of the second sliding frame 5 is adjusted adaptively according to the unevenness of the ground. Subsequently, the second bolt 51 is used to penetrate the second sliding frame 5 and is threadedly connected to the connecting frame 42 for fixation, achieving the effect of assisting in supporting the first sliding frame 2.

[0041] When strengthening the bearing capacity of pile foundations of different models, the top and bottom of the first fitting plate 13 are respectively connected to the fixing frame 6 as supports. The two second fitting plates 61 are connected to the top and bottom of the first fitting plate 13. As the first threaded rod 12 rotates, the position of the first fitting plate 13 is adjusted, and the two second fitting plates 61 synchronously follow the adjustment to fit the outer wall of the pile foundation. The sides of the two second fitting plates 61 close to the pile foundation are also V-shaped. The two second fitting plates 61 synchronously fit the outer wall of the pile foundation, and rely on the cooperation assembly to support the second fitting plates 61, thereby improving the effect of strengthening the bearing capacity of the pile foundation; when the second fitting plate 61 supports pile foundations of different models, the cooperation frame 7 slides on the outer walls of the two first sliding frames 2 and is connected to the second threaded rod 71. The second threaded rod 71 synchronously performs thread adjustment with the first threaded rod 12. After the adjustment is completed, the cooperation frame 7 cooperates with the second threaded rod 71 to support the fixing frame 6, enabling the second fitting plate 61 to have a support point when supporting pile foundations of different models, improving the supporting effect on the pile foundation.

[0042] When strengthening the load-bearing capacity inside a narrow karst cave, rotate the roulette 81 to adjust the support angle of the support frame 82 on the short rod 8, so that the end of the support frame 82 away from the roulette 81 closely fits the inner wall of the karst cave. After fixing the roulette 81, a support point is formed between the support frame 82 and the inner wall of the karst cave, facilitating the use of natural conditions to strengthen the load-bearing capacity inside the narrow karst cave, not only reducing the use of accessories, but also improving the support load-bearing effect on the pile foundation; when using the support frame 82 to cooperate with the inner wall of the karst cave for support, first adjust the position of the support frame 82, fit the support frame 82 on the inner wall of the karst cave for support, and then use the first bolt 21 to pass through the limit hole and the jack hole of the roulette 81 and be threadedly connected to the connection block 14, which can synchronously fix the positions of the connection block 14 and the support frame 82 on the roulette 81, thereby realizing the effect of the support frame 82 cooperating with the inner wall of the karst cave to strengthen the load-bearing capacity; when the support frame 82 is difficult to reach the inner wall of the karst cave and loses the support effect, drill holes in advance according to the actual situation. If drilling is not required, use the conical ends of the two wall-fixing screws 9 to be threadedly drilled into the inner wall of the karst cave. The two wall-fixing screws 9 serve as the connection between the support frame 82 and the inner wall of the karst cave, thus ensuring the stability of the support at the support frame 82 and improving the adaptability of the support frame 82 for use.

[0043] 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 by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A pile foundation bearing reinforcement device for cave construction, characterized in that: It comprises two ring plates, and the two ring plates are arranged opposite to each other; a plurality of connecting bolts are threadedly connected between the two ring plates; the inner wall of the ring plate is threadedly connected to a No. 1 threaded rod; the inner wall of the ring plate is slidably connected to a No. 1 fitting plate, and one side of the No. 1 fitting plate is rotatably connected to one end of the No. 1 threaded rod, and the other side of the No. 1 fitting plate away from the No. 1 threaded rod is V-shaped; the end of the No. 1 threaded rod away from the No. 1 fitting plate is rotatably connected to a connecting block; a ground fixing component is arranged on the connecting block, and the ground fixing component is used to support the connecting block.

2. A pile foundation bearing reinforcement device for cave construction according to claim 1, characterized in that: The ground fixing assembly includes a No. 1 sliding frame, a No. 1 bolt and a No. 1 support plate; the two No. 1 sliding frames are slidably connected to the connecting block, and a plurality of sockets are provided on the No. 1 sliding frame; the No. 1 bolt passes through the socket and is threadedly connected to the connecting block; the No. 1 support plate is fixedly connected to the bottom ends of the two No. 1 sliding frames.

3. A pile foundation bearing reinforcement device for cave construction according to claim 2, characterized in that: The bottom end of the No. 1 support plate is fixedly connected with two No. 1 plug-in rods; the bottom ends of the two No. 1 plug-in rods are conically arranged.

4. The pile foundation load-bearing reinforcement device for cave construction according to claim 2 is characterized in that: A sliding block is slidably connected between the two No. 1 sliding frames; the inner walls on both sides of the sliding block are slidably connected to the limit rods through elastic parts; a connecting frame is fixedly connected to the side of the sliding block away from the No. 1 bonding plate; a plug-in component is arranged on the connecting frame, and the plug-in component is used to assist in fixing and supporting the No. 1 sliding frame.

5. A pile foundation bearing reinforcement device for cave construction according to claim 4, characterized in that: The plug-in assembly includes a No. 2 sliding frame, a No. 2 bolt, a No. 2 support plate and a No. 2 plug-in rod; the No. 2 sliding frame is slidably connected to the connecting frame; the No. 2 bolt passes through the No. 2 sliding frame and is threadedly connected to the connecting frame; the No. 2 support plate is fixedly connected to the bottom end of the No. 2 sliding frame; a plurality of No. 2 plug-in rods are fixedly connected to the bottom end of the No. 2 support plate, and the bottom end of the No. 2 plug-in rod is conically set.

6. The pile foundation load-bearing reinforcement device for cave construction according to claim 2, characterized in that: The top and bottom of the No. 1 plywood are fixedly connected with fixing frames; the outer walls of the two fixing frames are fixedly connected with the No. 2 plywood; the No. 1 sliding frame is provided with a matching component, which is used to support the No. 2 plywood to strengthen the pile foundation bearing.

7. A pile foundation load-bearing reinforcement device for cave construction according to claim 6, characterized in that: The mating assembly includes a mating frame and a No. 2 threaded rod; the mating frame is slidably connected to the outer wall of the No. 1 sliding frame; the mating frame is slidably connected to the outer walls of two No. 1 sliding frames; the No. 2 threaded rod is rotatably connected to the side of the mating frame away from the No. 1 sliding frame, and the No. 2 threaded rod is threadedly connected to the inner wall of the fixed frame.

8. The pile foundation load-bearing reinforcement device for cave construction according to claim 2, characterized in that: A short rod is fixedly connected to the connecting block in the middle; a wheel disc is rotatably connected to the short rod; and a supporting frame is fixedly connected to the wheel disc.

9. A pile foundation load-bearing reinforcement device for cave construction according to claim 8, characterized in that: The wheel disc is provided with a plurality of limiting holes, and the diameter of the limiting holes corresponds to the diameter of the No. 1 bolt.

10. A pile foundation load-bearing reinforcement device for cave construction according to claim 9, characterized in that: The inner walls on both sides of the support frame are threadedly connected with wall-fixing screws; the end of the wall-fixing screw away from the wheel disc is set in a cone.

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