Karst cave treatment device for pile foundation construction

Abstract

The invention relates to the technical field of karst cave filling impact devices, in particular to a karst cave treatment device used in pile foundation construction, which comprises a lifting seat, an impact seat, an external connection seat and a side expansion mechanism, the lifting seat is used for being connected with a steel cable, the lifting seat is lifted through the steel cable, and the impact seat is used for downwards punching a filling material; the impact seat is movably connected with the lifting seat, the external connection seat is rotatably connected with the bottom end of the lifting seat, the external connection seat is slidably connected with the impact seat in a sleeved mode, and the side expansion mechanism is arranged on the outer side of the impact seat in a sleeved mode. According to the device, downward tamping impact is conducted on filler through the impact seat, downward impact is conducted on a filler layer through the impact seat, after the impact seat stops moving downwards, the hanging seat with the hanging seat continuously moving downwards drives the external connection seat to move downwards, the external connection seat moves downwards to drive a plurality of transverse pressing wheels in the side expansion mechanism to move transversely in a deviating mode, and therefore the transverse pressing wheels transversely push out the filler; transverse diffusion of the filler is accelerated, the compactness of the periphery of the filler layer is improved, and therefore the tamping effect of the filler layer is improved.

Description

Technical Field

[0001] This invention relates to the field of impact devices for filling karst caves, specifically a karst cave treatment device used in pile foundation construction. Background Art

[0002] When encountering karst caves during pile foundation drilling in geologically complex areas, different treatment methods are adopted depending on the size and internal conditions of the caves. In cases where the karst caves are unfilled or partially filled, and the cave height is not very large, but there is severe leakage, causing the mud head height inside the casing to be unable to be maintained, materials such as rubble and clay can be used for impact backfilling to ensure that the backfill material is fully compacted. This process of backfilling with rubble and clay is repeated multiple times until the filling layer inside the karst cave stops leaking after drilling. When constructing the wall using the clay and rubble method, it is necessary to support the permeable layer with a steel casing. The steel casing must penetrate the permeable layers such as gravel and pebble layers and sit on the impermeable sub-clay layer to prevent the borehole from collapsing due to a sharp drop in water head height caused by leakage from the karst cave. If the filled karst cave leaks again during subsequent drilling, it is necessary to backfill and impact the leaking karst cave again until the backfill layer stops leaking. In existing methods of impact compaction, the backfill layer is generally compacted using an impact drill bit. Since the impact drill bit can only move up and down within the drilling position, the overall compaction range of the backfill layer is truncated cone-shaped, wider at the bottom and narrower at the top. This results in a significant amount of loose compaction around the periphery of the backfill layer. After the borehole penetrates the filler layer, mud is injected into the borehole during downward construction, which compresses the borehole walls. Because the compaction depth at the top of the borehole is relatively shallow, the top of the borehole is prone to collapse and leakage after the mud is injected. Therefore, a karst cave treatment device is needed to improve the compaction degree of the backfill layer in karst caves. Summary of the Invention

[0003] The purpose of this invention is to provide a device for treating karst caves in pile foundation construction, so as to solve the problems mentioned in the background art.

[0004] To achieve the above object, the present invention provides the following technical solutions: A device for treating karst caves in pile foundation construction, comprising: A lifting platform is used to connect to a steel cable, and the platform is lifted using the steel cable. An impact seat is used to press the filler material downwards, and the impact seat is movably connected to the hanger. An external base is rotatably connected to the bottom end of the hanging base, and the external base is slidably sleeved with the impact base; The side expansion mechanism is sleeved on the outside of the impact seat. The top of the side expansion mechanism is rotatably connected to the outer seat. The side expansion mechanism includes multiple horizontal pressure rollers arranged at equal angles in annular shape. When the outer seat moves downward relative to the impact seat, it drives the multiple horizontal pressure rollers to move away from each other.

[0005] Furthermore, the impact seat includes four stamping feet fixed at the bottom end, the four stamping feet being arranged at equal angles in a ring, and the impact seat includes a central cylinder disposed at the top end.

[0006] Furthermore, a crossbar is fixedly connected between the two sides of the inner wall of the outer connector, a side sliding groove is provided on the outer wall of the central cylinder, the side sliding groove passes through the central cylinder, the crossbar is slidably connected to the inner wall of the side sliding groove, the outer connector is sleeved on the outer side of the central cylinder, and an adjustment mechanism is provided between the outer connector and the inner wall of the central cylinder.

[0007] Furthermore, the adjusting mechanism includes a central rod and two peripheral rods. A rotating seat is fixedly connected to the middle position of the crossbar. The bottom end of the hanging seat is rotatably connected to the rotating seat. The bottom end of the rotating seat is rotatably connected to the central rod. Multiple helical teeth are equidistantly fixed to the outer side wall of the central rod. The two peripheral rods are respectively fixed to both sides of the inner wall of the central cylinder. A lowering groove is opened on the inner side wall of the peripheral rod. A receiving groove is opened on both sides of the top of the lowering groove on the inner side wall of the peripheral rod. Multiple misalignment grooves are opened at the top of the inner wall of the peripheral rod.

[0008] Furthermore, the side expansion mechanism also includes a second annular slide rail and a first annular slide rail. The second annular slide rail is rotatably connected to the outer wall of the outer seat, and the first annular slide rail is rotatably connected to the impact seat. Multiple support modules are provided between the first annular slide rail and the second annular slide rail, and each of the multiple support modules corresponds to a multiple transverse pressure roller. The transverse pressure roller is rotatably connected to one end of the corresponding support module.

[0009] Furthermore, the bracket module includes a fixed base one and a fixed base two. The fixed base one is fixedly connected to the outer wall of the annular slide rail one, and the fixed base two is fixedly connected to the outer wall of the annular slide rail two. One end of the fixed base two is rotatably connected to a support arm, and one end of the fixed base one is rotatably connected to a curved arm. One end of the curved arm is rotatably connected to the middle position of the support arm, and one end of the support arm is rotatably connected to a corresponding horizontal pressure wheel.

[0010] Furthermore, the distance between the rotation axes at both ends of the curved arm is half the distance between the rotation axes at both ends of the support arm, and the rotation axis at the other end of the support arm is located directly above the rotation axis of the fixed seat.

[0011] Furthermore, an extrusion plate is fixedly sleeved on the outer side wall of the top end of the central cylinder, a third fixed seat is fixedly connected to the top surface of the second fixed seat, and a misalignment frame is rotatably connected to the top end of the third fixed seat. The misalignment frame includes a push rod at one end and a counterweight rod at the other end, and the length of the push rod is greater than the length of the counterweight rod.

[0012] Furthermore, the bottom surface of the extrusion disc is fixedly connected with multiple protrusions at equal intervals in a ring.

[0013] Furthermore, a receiving seat is fixedly connected to the bottom end of the outer wall of the central cylinder, and a fixed ring rail is provided below the receiving seat. The fixed ring rail is fixedly connected to the top outer wall of the multiple stamping feet by bolts, and the annular slide rail is rotatably connected between the fixed ring rail and the multiple stamping feet.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up multiple horizontal pressure rollers, after the filling material composed of rubble and clay is added to the karst cave, the invention is continuously moved up and down by steel cables, thereby impacting the filling material from top to bottom. The impact seat impacts the filling layer downward. When the impact seat stops moving downward, the hanging seat continues to move downward, which drives the outer seat to move downward. The downward movement of the outer seat causes multiple horizontal pressure rollers in the side expansion mechanism to move laterally away from each other, so that the horizontal pressure rollers push the filling material out laterally, thereby accelerating the lateral diffusion of the filling material, improving the density of the outer periphery of the filling layer, thereby improving the compaction effect of the filling layer, reducing the risk of the filling layer collapsing, and thus reducing the need for repeated compaction and rework caused by leakage of the karst cave filling layer. 2. Through the setting of the support module and the misalignment frame, when the second annular slide rail moves upward, the support module drives multiple transverse pressure rollers to converge towards the center. The upward movement of the second annular slide rail causes the misalignment frame to contact the extrusion plate, and one end of the push rod abuts against a protrusion. As the second annular slide rail moves upward, the second annular slide rail pushes the extrusion plate through the push rod, thereby causing the side expansion mechanism and the impact seat to rotate in opposite directions. Since the hanger and the outer seat are rotatably connected, and the outer seat and the second annular slide rail are rotatably connected, the rotation of the side expansion mechanism and the impact seat has little impact on the rotation of the hanger, thereby reducing the resulting cable twisting. Through the rotation setting of the side expansion mechanism and the impact seat, the impact seat is pushed to rotate in the forward direction, and the side expansion mechanism is pushed to rotate in the reverse direction by the reaction force, thereby adjusting the angle of the transverse pressure rollers and realizing that the transverse pressure rollers can perform transverse impact on the periphery of the packing layer, which facilitates the uniform impact compaction of the packing layer. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the existing impact drilling used to compact the backfill layer; Figure 2 It is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the impact seat structure in this invention; Figure 4 This is a schematic diagram of the side expansion mechanism in this invention; Figure 5 This is a schematic diagram of the adjustment mechanism structure in this invention; Figure 6 This is a schematic diagram of the outer rod structure in this invention; Figure 7 This is a schematic diagram of the structure of multiple horizontal pressure rollers in the unfolded state in this invention.

[0016] In the diagram: 100, Hanging seat; 200, Impact seat; 210, Stamping foot; 220, Center cylinder; 221, Side slide groove; 230, Fixed ring rail; 240, Extrusion plate; 241, Protrusion; 250, Receiving seat; 300, Side expansion mechanism; 310, Ring slide rail one; 320, Ring slide rail two; 330, Horizontal pressure roller; 340, Support module; 341, Support arm; 342, Fixed seat one; 343, Crank arm; 344, Fixed seat two; 345, Fixed seat three; 350, Misalignment frame; 351, Push rod; 352, Counterweight rod; 400, Adjustment mechanism; 410, Outer rod; 411, Lowering groove; 412, Receiving groove; 413, Misalignment groove; 420, Center rod; 421, Helical tooth; 500, External seat; 510, Crossbar; 520, Rotating seat. Detailed Implementation

[0017] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0018] Please see Figures 2 to 5 In this embodiment of the invention, a karst cave treatment device for pile foundation construction includes a lifting seat 100, an impact seat 200, a lateral expansion mechanism 300, and an external connecting seat 500. The lifting seat 100 is connected to a steel cable for hoisting. The impact seat 200 is used to press the filler material downwards, and the impact seat 200 is movably connected to the lifting seat 100. The external connecting seat 500 is rotatably connected to the bottom end of the lifting seat 100 and slidably sleeved with the impact seat 200. The lateral expansion mechanism 300 is sleeved on the outside of the impact seat 200, and its top end is rotatably connected to the external connecting seat 500. The lateral expansion mechanism 300 includes multiple annular horizontal pressure rollers 330 arranged at equal angles. When the external connecting seat 500 moves downwards relative to the impact seat 200, it drives the multiple horizontal pressure rollers 330 to move away from each other.

[0019] Specifically, after the filling material composed of rubble and clay is added to the karst cave, the invention is continuously moved up and down by steel cables, thereby impacting the filling material from top to bottom. The impact seat 200 impacts the filling layer downwards. When the impact seat 200 stops moving downwards, the hanging seat 100 continues to move downwards, which in turn drives the outer seat 500 to move downwards. The downward movement of the outer seat 500 causes multiple horizontal pressure rollers 330 in the side expansion mechanism 300 to move laterally away from each other, so that the horizontal pressure rollers 330 push the filling material laterally, thereby accelerating the lateral diffusion of the filling material, increasing the density of the outer periphery of the filling layer, thereby improving the compaction effect of the filling layer, reducing the risk of the filling layer collapsing, and thus reducing the need for repeated compaction and rework caused by leakage of the karst cave filling layer.

[0020] Example 1 like Figures 3-7 As shown, in this embodiment, the side expansion mechanism 300 further includes a second annular slide rail 320 and a first annular slide rail 310. The second annular slide rail 320 is rotatably connected to the outer wall of the outer seat 500, and the first annular slide rail 310 is rotatably connected to the impact seat 200. Multiple support modules 340 are arranged between the first annular slide rail 310 and the second annular slide rail 320, and each support module 340 corresponds one-to-one with a multiple transverse pressure roller 330. The transverse pressure roller 330 is rotatably connected to one end of the corresponding support module 340. The support module 340 includes a first fixed seat 342 and a second fixed seat 344. 2. Fixed to the outer wall of the first ring slide rail 310, fixed to the outer wall of the second ring slide rail 320, fixed to the outer wall of the second fixed seat 344, a support arm 341 is rotatably connected to one end of the second fixed seat 344, a crank arm 343 is rotatably connected to one end of the first fixed seat 342, a crank arm 343 is rotatably connected to the middle position of the support arm 341, a support arm 341 is rotatably connected to the corresponding horizontal pressure wheel 330, the distance between the rotation axes of the two ends of the crank arm 343 is half the distance between the rotation axes of the two ends of the support arm 341, and the rotation axis of the other end of the support arm 341 is located directly above the rotation axis of the first fixed seat 342; An extrusion plate 240 is fixedly sleeved on the outer side wall of the top of the central cylinder 220. A third fixed seat 345 is fixedly connected to the top surface of the second fixed seat 344. A misalignment frame 350 is rotatably connected to the top of the third fixed seat 345. The misalignment frame 350 includes a push rod 351 at one end and a counterweight rod 352 at the other end. The length of the push rod 351 is greater than the length of the counterweight rod 352. Multiple protrusions 241 are fixedly connected annularly at equal intervals on the bottom surface of the extrusion plate 240. A receiving seat 250 is fixedly connected to the bottom end of the outer side wall of the central cylinder 220. A fixed ring rail 230 is provided below the receiving seat 250. The fixed ring rail 230 is fixedly connected to the outer side wall of the top of multiple stamping feet 210 by bolts. A ring slide rail 310 is rotatably connected between the fixed ring rail 230 and the multiple stamping feet 210.

[0021] In this embodiment, the distance from the other end of the support arm 341 to one end of the curved arm 343 is equal to the distance from one end of the support arm 341 to one end of the curved arm 343, and the other end of the support arm 341 is directly above the other end of the curved arm 343. This allows the external seat 500 to drive the annular slide rail 320 to move up and down, while the support arm 341 drives the side expansion mechanism 300 to move laterally. The horizontal pressure roller 330 maintains a constant height during this lateral movement, ensuring that the horizontal pressure roller 330 only laterally compresses the filler, preventing the multiple horizontal pressure rollers 330 from affecting the posture of the impact seat 200 when opening and closing. Through the setting of the misalignment frame 350, when the annular slide rail 320 moves upward, the support module 340 drives the multiple horizontal pressure rollers 330 to converge towards the center. The upward movement of the annular slide rail 320 causes the misalignment frame 350 to contact the extrusion plate 240, and one end of the push rod 351 abuts against a protrusion 241. As the annular slide rail 320 moves upward, it pushes the extrusion disc 240 via the push rod 351, causing the side expansion mechanism 300 and the impact seat 200 to rotate in opposite directions. Since the hanger 100 and the outer seat 500 are rotatably connected, and the outer seat 500 and the annular slide rail 320 are rotatably connected, the rotation of the side expansion mechanism 300 and the impact seat 200 has little impact on the rotation of the hanger 100, thus reducing the resulting cable twisting. Through the rotation setting of the side expansion mechanism 300 and the impact seat 200, the impact seat 200 is pushed to rotate in the forward direction, and the side expansion mechanism 300 is pushed to rotate in the reverse direction by the reaction force, thereby adjusting the angle of the transverse pressure roller 330. This allows the transverse pressure roller 330 to perform transverse impact on the circumference of the packing layer, facilitating uniform impact compaction of the packing layer. The rotation of the impact seat 200 achieves uniform impact below the impact seat 200.

[0022] Example 2 Based on Embodiment 1, in order to increase the downward impact force of the impact seat 200 in Embodiment 1.

[0023] like Figures 4-7 As shown, in this embodiment, the impact seat 200 includes four stamping feet 210 fixed at the bottom end, and the four stamping feet 210 are arranged in a ring at equal angles. The impact seat 200 includes a central cylinder 220 disposed at the top end. A crossbar 510 is fixed between the two sides of the inner wall of the outer seat 500. A side sliding groove 221 is provided on the outer side wall of the central cylinder 220. The side sliding groove 221 passes through the central cylinder 220. The crossbar 510 is slidably connected to the inner wall of the side sliding groove 221. The outer seat 500 is sleeved on the outer side of the central cylinder 220. An adjustment mechanism 400 is provided between the outer seat 500 and the inner wall of the central cylinder 220. The adjusting mechanism 400 includes a central rod 420 and two peripheral rods 410. A rotating seat 520 is fixedly connected to the middle position of the crossbar 510. The bottom end of the hanging seat 100 is rotatably connected to the rotating seat 520. The bottom end of the rotating seat 520 is rotatably connected to the central rod 420. Multiple helical teeth 421 are equidistantly fixed to the outer side wall of the central rod 420. The two peripheral rods 410 are respectively fixed to both sides of the inner wall of the central cylinder 220. A lowering groove 411 is opened on the inner side wall of the peripheral rod 410. A receiving groove 412 is opened on both sides of the top of the lowering groove 411 on the inner side wall of the peripheral rod 410. Multiple misalignment grooves 413 are opened at the top of the inner wall of the peripheral rod 410.

[0024] In specific implementation, when the outer seat 500 moves downward relative to the central cylinder 220, the central rod 420 drives the helical tooth 421 to slide into the lowering groove 411. Since the lowering groove 411 is relatively long, the outer seat 500 can move downward a relatively long distance relative to the impact seat 200 when it moves downward, so that the transverse pressure roller 330 impacts the packing layer laterally. After the central rod 420 moves upward, the helical tooth 421 interferes with the misalignment groove 413, causing the central rod 420 to rotate. When the central rod 420 moves downward for the second time, the helical tooth 421 slides into the receiving groove 412, so that the outer seat 500 impacts the impact seat 200 downward through the central rod 420. The receiving groove 412 restricts the downward movement of the outer seat 500, thereby avoiding the transverse impact of multiple transverse pressure rollers 330, thereby increasing the downward impact force of the impact seat 200 and facilitating the downward compaction of the packing layer.

[0025] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0026] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A cave treatment device for pile foundation construction, characterized in that: include: A hanging seat (100) is used to be connected to the steel cable, and the hanging seat (100) is hoisted by the steel cable; An impact seat (200) is used to press the filler downwards, and the impact seat (200) is movably connected to the hanging seat (100); An external seat (500) is rotatably connected to the bottom end of the hanging seat (100), and the external seat (500) is slidably sleeved with the impact seat (200); The side expansion mechanism (300) is sleeved on the outside of the impact seat (200), and the top end of the side expansion mechanism (300) is rotatably connected to the external seat (500). The side expansion mechanism (300) comprises a plurality of annular transverse pressure wheels (330) arranged at equal angles. When the external seat (500) moves downward relative to the impact seat (200), it drives the plurality of transverse pressure wheels (330) to move away from each other.

2. A karst cave treatment device for pile foundation construction according to claim 1, characterized in that: The impact seat (200) comprises four punching feet (210) fixed at the bottom end, the four punching feet (210) are arranged in a ring with equal angles, and the impact seat (200) comprises a central tube (220) arranged at the top end.

3. A karst cave treatment device for pile foundation construction according to claim 2, characterized in that: A cross bar (510) is fixedly connected between the two sides of the inner wall of the external seat (500), a side slide groove (221) is provided on the outer wall of the central tube (220), the side slide groove (221) penetrates the central tube (220), the cross bar (510) is slidably connected to the inner wall of the side slide groove (221), the external seat (500) is sleeved on the outer side of the central tube (220), and an adjustment mechanism (400) is provided between the external seat (500) and the inner wall of the central tube (220).

4. A karst cave treatment device for pile foundation construction according to claim 3, characterized in that: The adjustment mechanism (400) comprises a central rod (420) and two peripheral rods (410); a rotating seat (520) is fixedly connected to the middle position of the cross rod (510); the bottom end of the hanging seat (100) is rotatably connected to the rotating seat (520); the bottom end of the rotating seat (520) is rotatably connected to the central rod (420); a plurality of bevel teeth (421) are equidistantly fixedly connected to the outer wall of the central rod (420); the two peripheral rods (410) are respectively fixed to the two sides of the inner wall of the central tube (220); a lowering groove (411) is provided on the inner wall of the peripheral rod (410); receiving grooves (412) are provided on the inner wall of the peripheral rod (410) at the two sides of the top of the lowering groove (411); and a plurality of offset grooves (413) are provided at the top of the inner wall of the peripheral rod (410).

5. The karst cave treatment device used in pile foundation construction according to claim 3, characterized in that: The side expansion mechanism (300) further comprises an annular slide rail 2 (320) and an annular slide rail 1 (310), wherein the annular slide rail 2 (320) is rotatably connected to the outer side wall of the external seat (500), the annular slide rail 1 (310) is rotatably connected to the impact seat (200), a plurality of bracket modules (340) are arranged between the annular slide rail 1 (310) and the annular slide rail 2 (320), and the plurality of bracket modules (340) correspond one to one to the plurality of transverse pressure wheels (330), and the transverse pressure wheel (330) is rotatably connected to one end of the corresponding bracket module (340).

6. A karst cave treatment device for pile foundation construction according to claim 5, characterized in that: The support module (340) includes a fixing seat 1 (342) and a fixing seat 2 (344), wherein the fixing seat 1 (342) is fixedly connected to the outer wall of the annular slide rail 1 (310), and the fixing seat 2 (344) is fixedly connected to the outer wall of the annular slide rail 2 (320), one end of the fixing seat 2 (344) is rotatably connected to a support arm (341), and one end of the fixing seat 1 (342) is rotatably connected to a curved arm (343), one end of the curved arm (343) is rotatably connected to the middle position of the support arm (341), and one end of the support arm (341) is rotatably connected to the corresponding transverse pressure wheel (330).

7. A karst cave treatment device for pile foundation construction according to claim 6, characterized in that: The distance between the rotation axes at both ends of the curved arm (343) is half the distance between the rotation axes at both ends of the support arm (341), and the rotation axis at the other end of the support arm (341) is located directly above the rotation axis of the first fixing seat (342).

8. The device for treating karst caves in pile foundation construction according to claim 6, characterized in that: The top outer wall of the center tube (220) is fixedly sleeved with an extrusion disk (240), the top surface of the second fixing seat (344) is fixedly connected with the third fixing seat (345), the top of the third fixing seat (345) is rotatably connected with a dislocation frame (350), the dislocation frame (350) comprises a push rod (351) arranged at one end and a counterweight rod (352) arranged at the other end, and the length of the push rod (351) is greater than the length of the counterweight rod (352).

9. A karst cave treatment device for pile foundation construction according to claim 8, characterized in that: A plurality of protrusions (241) are fixedly connected in an annular manner at equal intervals to the bottom surface of the extrusion disk (240).

10. The device for treating karst caves in pile foundation construction according to claim 8, characterized in that: A receiving seat (250) is fixedly connected to the bottom end of the outer wall of the central tube (220), a fixed ring rail (230) is arranged below the receiving seat (250), the fixed ring rail (230) and the top outer walls of the plurality of punching feet (210) are fixedly connected by bolts, and the annular slide rail (310) is rotatably connected between the fixed ring rail (230) and the plurality of punching feet (210).

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