A method for reinforcing construction of a karst cave roadbed

Abstract

The application belongs to the technical field of road construction, and particularly relates to a reinforcing construction method for a karst cave roadbed, which comprises steel bar pre-burial and comprises the following steps: using a steel bar clamping device to clamp the pre-buried steel bar, using a feeding device to vertically and linearly feed the clamped pre-buried steel bar along the outer surface of the drill rod of the hydraulic drilling machine to the bottom of the karst cave, and then simply fixing the vertical pre-buried steel bar through an anchor nail device, so that the pre-buried steel bar is distributed in a ring array in the karst cave after reciprocating actions of the steel bar clamping device, the feeding device and the anchor nail device. The reinforcing construction method for the karst cave roadbed can rotate the rotating screw rod by rotating the motor, so that the rotating screw rod drives the climbing gear to rotate, and then the climbing gear drives the supporting bottom plate to descend along the rack rod to the inner bottom wall of the karst cave, so that the feeding of the pre-buried steel bar can be realized, and the pre-buried steel bar is prevented from being obliquely inserted to cause subsequent construction difficulties.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road construction, in particular to a reinforcement construction method of karst cave roadbed. BACKGROUND

[0002] Special roadbed refers to the road section with special nature or difficulty encountered in general road construction. These special roadbeds may include karst caves, marshes, soft soil, mountainous areas, high altitude areas, etc. For different special roadbeds, corresponding design and construction measures need to be taken to solve the problems. For example, in karst cave area, geological survey needs to be carried out to ensure the stability and safety of the roadbed. Measures such as filling, reinforcing or building bridges can be taken to adapt to the karst cave terrain.

[0003] The commonly used special roadbed reinforcement method is to design reinforcement according to the characteristics and requirements of the roadbed. Reinforcing materials such as steel mesh or grid can be used for reinforcement, and are firmly connected with the foundation. Finally, concrete or other reinforcing materials are poured to form a reinforced layer to improve the strength and stability of the roadbed. However, the general karst cave is deep, and the steel bars are added by the way of crane, so that the placement position of the steel bars is not uniform, and the steel bars are more likely to be inclined, which is not convenient for the fixation of the steel bars, thereby increasing the difficulty of karst cave reinforcement construction. Therefore, the present application solves the above technical problems. SUMMARY

[0004] Based on the above technical problems, the present application provides a reinforcement construction method of karst cave roadbed.

[0005] The reinforcement construction method of karst cave roadbed provided by the present application comprises:

[0006] a. Preliminary modeling: according to the geological survey report, the detection zone is divided, the point position is arranged, the borehole pile sound measuring pipe is installed, the shape of the karst cave is measured by ultrasonic wave, and the model is established;

[0007] b. Drilling: drilling the karst cave by using a hydraulic drilling machine according to the type of the karst cave;

[0008] c. Steel bar pre-burying: using a steel bar clamping device to clamp the pre-buried steel bar, and using a feeding device to vertically and linearly transport the clamped pre-buried steel bar along the outer surface of the drill rod of the hydraulic drilling machine to the bottom of the karst cave, and then fixing the vertical pre-buried steel bar by using an anchor device, the steel bar clamping device, the feeding device and the anchor device are reciprocated to make the pre-buried steel bar in the karst cave in a ring array distribution;

[0009] d. Filling construction operation: according to the characteristics of the stratum and the engineering requirements, the ground work adopts appropriate tamping method to pour concrete in the karst cave;

[0010] e. Monitoring and maintenance: During the reinforcement construction process, real-time monitoring is carried out, such as ground settlement and pore water pressure, and timely maintenance measures are taken to ensure the stability and safety of the filling engineering.

[0011] Preferably, the outer surface of the drill rod is movably sleeved with a guide plate, the inner surface of the guide plate is rotatably connected with a driving gear through a bearing, the inner side wall of the driving gear drives the drill rod to rotate and descend through the cooperation of the key and the key groove, the feeding device is arranged on the outer surface of the drill rod, the reinforcing bar clamping device is arranged on the upper surface of the feeding device, and the anchor device is arranged on the upper surface of the reinforcing bar clamping device through a supporting rod.

[0012] The feeding device drives the reinforcing bar clamping device and the anchor device to move linearly downward on the outer surface of the drill rod, and the feeding device comprises a rack rod that can stretch and retract on the outer surface of the drill rod.

[0013] The reinforcing bar clamping device clamps the embedded reinforcing bar on one end of the upper surface of the feeding device, and then pushes the embedded reinforcing bar horizontally to the inner wall of the karst cave, and the reinforcing bar clamping device comprises horizontally distributed symmetrical slide rails.

[0014] The anchor device slides up and down on the outer surface of the drill rod in linkage with the feeding device, and fixes the embedded reinforcing bar on the inner wall of the karst cave, and the anchor device comprises an anchor plate that fixes the embedded reinforcing bar.

[0015] Preferably, the feeding device comprises a push air cylinder fixedly installed in the inner part of the upper end of the drill rod, the inner part of the drill rod is provided with a movable cavity, the lower surface of the piston rod of the push air cylinder extends into the inner part of the movable cavity, and the lower surface of the piston rod of the push air cylinder is fixedly connected with an adjusting rod with a circular-arc convex side surface through a connecting rod, the outer surface of the adjusting rod is slidably connected with the inner wall of the movable cavity, one side of the outer surface of the drill rod is provided with an expansion slot, and the outer surface of the rack rod is slidably connected with the inner wall of the expansion slot.

[0016] Through the above technical solution, the drill rod can be linearly moved up and down through the guide of the guide plate after being hoisted by the hoisting rail, and the drill rod can be controlled to rotate through the rotation of the driving gear, so that the drill bit on the lower surface of the drill rod can realize the drilling of the karst cave. In order to realize the pouring of the karst cave, the embedded reinforcing bar is inserted into the karst cave, the push air cylinder is actuated, the piston rod is pushed downward to push the adjusting rod, so that the adjusting rod can extrude the rack rod out of the expansion slot to be convex, and then the clamping and feeding of the embedded reinforcing bar are realized.

[0017] Preferably, the feeding device further comprises telescopic holes arranged in a rectangular array inside the drill rod, and the two ends of the telescopic holes are in communication with the inside of the telescable slot, the inner wall of the telescopic hole is slidingly connected with a telescopic rod, one side surface of the telescopic rod is fixedly connected with one side surface of the rack rod, the outer surface of the telescopic rod is fixedly sleeved with a return spring, and the free end of the return spring is fixedly connected with the inner wall of the telescopic hole.

[0018] Through the above technical scheme, in order to facilitate the telescopic rotation of the drill rod and realize the climbing track of the drill rod after drilling, the push cylinder pushes out the rack rod, in order to facilitate the limitation of the position of the rack rod being pushed out and facilitate its retraction into the telescable slot, when the push cylinder pushes down the adjusting rod, the telescopic rod is extruded to be telescopic from the telescopic hole, and the return spring is compressed, so that the rack rod can be tightly pressed under the extrusion force of the return spring, thereby forming the climbing track of the drill rod.

[0019] Preferably, the feeding device further comprises a climbing ring movably sleeved on the outer surface of the drill rod, the inner side wall of the climbing ring is slidingly connected with the inner wall of the key groove through a key rod, one side inner wall of the climbing ring is provided with a roller, the outer surface of the roller is in sliding contact with the outer surface of the drill rod, one side outer surface of the climbing ring is fixedly connected with a support ear plate extending out and arranged in parallel, the surface of the support ear plate is rotatably connected with a climbing gear through a rotating shaft, and the outer surface of the climbing gear is in engagement with the outer surface of the rack rod.

[0020] Through the above technical scheme, in order to make the rack rod extend to drive the steel bar clamping device and the anchor device to descend for feeding, the climbing gear on the support ear plate is rotated to drive the climbing ring to descend along the rack rod, thereby realizing the vertical feeding of the embedded steel bar, and in order to reduce the climbing or descending resistance of the climbing ring, the roller mounted on the inner side wall is rotated along the drill rod when the height of the climbing ring is adjusted.

[0021] Preferably, the feeding device further comprises a support base plate fixedly installed on the upper surface of the support ear plate, a rotating screw is rotatably connected to the lower surface of the support base plate through a mounting plate, the outer surface of the rotating screw is in engagement with the outer surface of the climbing gear, a rotating motor is fixedly installed on one end of the lower surface of the support base plate through a mounting block, and the output shaft of the rotating motor is fixedly connected with one side surface of the rotating screw through a shaft coupling.

[0022] Through the technical scheme, because the karst cave is deep, in order to vertically transport the embedded steel bar to the inner side wall of the karst cave, after the climbing gear meshes with the outer surface of the rack rod, the rotating screw is controlled to rotate by the rotating motor, so that the rotating screw drives the climbing gear to rotate, and then the climbing gear drives the supporting bottom plate to descend along the rack rod to the inner bottom wall of the karst cave, so that the feeding of the embedded steel bar can be realized.

[0023] Preferably, the horizontal sliding rail is fixedly installed on the upper surface of the supporting bottom plate, the outer surface of the horizontal sliding rail is fixedly connected with the supporting sliding block in a spaced distribution mode, the upper surface of the supporting sliding block is fixedly connected with the sliding bottom plate, the upper surface of the sliding bottom plate is fixedly connected with the clamping air cylinder, and the inner surface of the clamping jaw of the clamping air cylinder is fixedly connected with the arc-shaped clamping ring.

[0024] Through the technical scheme, in order to vertically transport the embedded steel bar, the embedded steel bar is contacted and clamped with the arc-shaped clamping ring of the clamping air cylinder above the karst cave, so that the clamping air cylinder clamps the lower end of the embedded steel bar and descends to the bottom of the karst cave along with the descending of the climbing gear, and the upper end of the embedded steel bar can be limited and guided by the limiting ring installed on the surface of the guide ring, and in order to push the embedded steel bar to the inner wall of the karst cave for lamination, the sliding bottom plate is slid to one side, so that the embedded steel bar can be pushed.

[0025] Preferably, the steel bar clamping device further comprises a moving air cylinder fixedly connected to the upper surface of the supporting bottom plate, and the piston rod surface of the moving air cylinder is fixedly connected to the lower surface of the sliding bottom plate through a connecting block.

[0026] Through the technical scheme, in order to control the sliding bottom plate to push, the moving air cylinder on the lower surface thereof is actuated to push the sliding bottom plate, so that the supporting sliding block on the lower surface of the sliding bottom plate moves horizontally on the outer surface of the horizontal sliding rail, and then the embedded steel bar clamped by the clamping air cylinder can be close to the inner wall of the karst cave, so that the steel bar can be conveniently fixed.

[0027] Preferably, the anchor device further comprises a linkage ring with the same specification as the climbing ring, one side surface of the linkage ring is fixedly connected with a parallel rod, the lower surfaces of the parallel rod are fixedly connected with the upper surfaces of the supporting bottom plate and the clamping air cylinder respectively, the upper surface of the parallel rod is slidably connected with a driving shell through a sliding clamping block, the outer surface of the linkage ring is fixedly connected with symmetrically distributed extension plates, the upper surfaces of the extension plates are fixedly connected with extension air cylinders, the piston rod surfaces of the extension air cylinders are fixedly connected with one side surface of the driving shell, the lower surface of the guide plate is fixedly connected with symmetrically distributed telescopic air cylinders, the piston rod lower surfaces of the telescopic air cylinders are fixedly connected with electromagnets, and the lower surfaces of the electromagnets are fixedly connected with the upper surface of the linkage ring.

[0028] Through the technical scheme, the anchor nail device is pushed above the steel bar clamping device through the parallel rod, the anchor plate clamps the embedded steel bar through the extension cylinder, the linkage ring and the climbing ring are fixed on the lower surface of the guide plate through the solenoid, and the high-speed rotation of the drill rod is avoided.

[0029] Preferably, the anchor nail device further comprises anchor nails rotatably sleeved on the surfaces of the two ends of the anchor plate, the surfaces of the driving housings are rotatably connected with rotating rods through bearings, the outer surfaces of the two rotating rods are provided with belt pulley assemblies for transmission, the side surfaces of the two rotating rods are fixedly connected with caps, and the inner surfaces of the caps are slidably connected with the outer surfaces of the hexagonal nuts of the anchor nails.

[0030] Through the technical scheme, the anchor plate is fixed on the inner wall of the karst cave through the uniform rotation of the anchor nails, the motor in the driving housing drives one rotating rod to rotate, the other rotating rod rotates synchronously under the linkage of the belt pulley assembly, the rotating rod inserted into the outer surface of the anchor nail drives the anchor nail to rotate, and the anchor plate fixes the embedded steel bar under the pushing of the extension cylinder.

[0031] The beneficial effects in the application are as follows:

[0032] 1. The feeding device is arranged, the embedded steel bar can climb along the drill rod, the rotating screw is controlled to rotate through the rotating motor in the adjusting process, the rotating screw drives the climbing gear to rotate, the climbing gear drives the supporting bottom plate to descend along the rack rod to the inner bottom wall of the karst cave, and thus the feeding of the embedded steel bar is realized, and the embedded steel bar is prevented from being inclined and inserted to cause subsequent construction difficulty.

[0033] 2. The steel bar clamping device is arranged, the embedded steel bar can be vertically clamped and sent to the inner wall of the karst cave, the lower end of the embedded steel bar is clamped by the clamping cylinder in the adjusting process, and the embedded steel bar descends to the bottom of the karst cave along with the descending of the climbing gear, the moving cylinder is controlled to act, the sliding bottom plate is pushed, the supporting sliding block on the lower surface of the sliding bottom plate moves horizontally on the outer surface of the horizontal sliding rail, the embedded steel bar clamped by the clamping cylinder is close to the inner wall of the karst cave, the embedded steel bar is fixed, and the pouring of the karst cave is facilitated.

[0034] 3、Through setting anchor device, the pre-buried steel bar arranged vertically can be quickly and simply fixed, in the process of adjusting, the motor in the driving shell drives one rotating rod to rotate, the rotating rod makes another rotating rod rotate synchronously under the linkage of belt pulley assembly, the rotating rod inserted on the outer surface of anchor drives the anchor to rotate, and under the pushing of extension cylinder, the anchor plate can fix the pre-buried steel bar, and when the drill rod is controlled to rotate at uniform speed, the uniform distribution of the pre-buried steel bar in the karst cave can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a schematic diagram of the reinforcing construction method of karst cave subgrade provided by the application;

[0036] Figure 2 It is a rack rod structure perspective view of the reinforcing construction method of karst cave subgrade provided by the application;

[0037] Figure 3 It is a telescopic groove structure perspective view of the reinforcing construction method of karst cave subgrade provided by the application;

[0038] Figure 4 It is a telescopic rod structure perspective view of the reinforcing construction method of karst cave subgrade provided by the application;

[0039] Figure 5 It is an adjusting rod structure perspective view of the reinforcing construction method of karst cave subgrade provided by the application;

[0040] Figure 6 It is a climbing ring structure perspective view of the reinforcing construction method of karst cave subgrade provided by the application;

[0041] Figure 7 It is a clamping cylinder structure perspective view of the reinforcing construction method of karst cave subgrade provided by the application;

[0042] Figure 8 It is a climbing gear structure perspective view of the reinforcing construction method of karst cave subgrade provided by the application;

[0043] Figure 9 It is a rotating screw rod structure perspective view of the reinforcing construction method of karst cave subgrade provided by the application;

[0044] Figure 10 It is a horizontal sliding rail structure perspective view of the reinforcing construction method of karst cave subgrade provided by the application;

[0045] Figure 11 It is an extension cylinder structure perspective view of the reinforcing construction method of karst cave subgrade provided by the application;

[0046] Figure 12A driving shell structure perspective view of a karst cave roadbed reinforcement construction method according to the present application;

[0047] Figure 13 An anchor structure perspective view of a karst cave roadbed reinforcement construction method according to the present application.

[0048] In the figure: 1, drill rod; 2, guide plate; 3, driving gear; 4, feeding device; 41, push cylinder; 42, movable cavity; 43, adjusting rod; 44, rack rod; 45, telescopic groove; 46, telescopic hole; 47, telescopic rod; 48, return spring; 49, climbing ring; 50, roller; 51, support lug; 52, climbing gear; 53, support base plate; 54, rotating screw; 55, rotating motor; 6, reinforcing bar clamping device; 61, horizontal sliding rail; 62, support sliding block; 63, sliding base plate; 64, clamping cylinder; 65, arc clamping ring; 66, moving cylinder; 7, anchor device; 71, anchor plate; 72, linkage ring; 73, parallel rod; 74, driving shell; 75, extension plate; 76, extension cylinder; 77, telescopic cylinder; 78, electromagnet; 79, anchor; 80, rotating rod; 81, pulley assembly; 82, cap. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0050] Referring to Figures 1-13 A karst cave roadbed reinforcement construction method, comprising:

[0051] a, preliminary modeling: according to the geological exploration report, the detection zone is divided, the point position is arranged, the pile acoustic measuring pipe is installed, the shape of the karst cave is measured by ultrasonic wave, and the modeling is performed;

[0052] b, drilling: drilling the karst cave by using a hydraulic drilling machine according to the type of the karst cave;

[0053] c, reinforcing bar pre-burying: the reinforcing bar pre-burying is clamped by using the reinforcing bar clamping device 6, and the clamped reinforcing bar pre-burying is vertically and linearly conveyed along the outer surface of the drill rod 1 of the hydraulic drilling machine to the bottom of the karst cave by using the feeding device 4, and then the vertical reinforcing bar pre-burying is simply fixed by using the anchor device 7, and the reinforcing bar clamping device 6, the feeding device 4 and the anchor device 7 are reciprocated to make the reinforcing bar pre-burying in the karst cave in a ring array;

[0054] d, filling construction operation: according to the stratum characteristics and engineering requirements, the ground work is taken to adopt a suitable tamping method to pour concrete into the karst cave;

[0055] e. Monitoring and maintenance: During the reinforcement construction process, real-time monitoring is carried out, such as ground settlement, pore water pressure, and timely maintenance measures are taken to ensure the stability and safety of the filling engineering.

[0056] The outer surface of the drill rod 1 is sleeved with a guide plate 2, the inner surface of the guide plate 2 is rotatably connected with a driving gear 3 through a bearing, the inner side wall of the driving gear 3 drives the drill rod 1 to rotate and descend through the cooperation of the key and the key groove, the feeding device 4 is arranged on the outer surface of the drill rod 1, the reinforcing bar clamping device 6 is arranged on the upper surface of the feeding device 4, and the anchor device 7 is arranged on the upper surface of the reinforcing bar clamping device 6 through a support rod.

[0057] The feeding device 4 drives the reinforcing bar clamping device 6 and the anchor device 7 to move linearly downward on the outer surface of the drill rod 1, and the feeding device 4 includes a rack rod 44 that can extend on the outer surface of the drill rod 1.

[0058] The drill rod 1 can move linearly up and down through the guide of the guide plate 2 through the hoisting rail hoisting, and the drill rod 1 can be controlled to rotate through the rotation of the driving gear 3, so that the drill bit on the lower surface of the drill rod 1 can realize the drilling of the karst cave. In order to realize the pouring of the karst cave, the feeding device 4 includes a push cylinder 41 fixedly installed in the inner part of the upper end of the drill rod 1, the inner part of the drill rod 1 is provided with a movable cavity 42, the lower surface of the piston rod of the push cylinder 41 extends into the inner part of the movable cavity 42, and the lower surface of the piston rod of the push cylinder 41 is fixedly connected with an adjusting rod 43 having a circular arc convex side surface through a connecting rod, the outer surface of the adjusting rod 43 is slidably connected with the inner wall of the movable cavity 42, the outer surface of the drill rod 1 is provided with an expansion slot 45, and the outer surface of the rack rod 44 is slidably connected with the inner wall of the expansion slot 45. After the embedded reinforcing bar is inserted into the karst cave, the push cylinder 41 is actuated, the piston rod pushes the adjusting rod 43 downward, so that the adjusting rod 43 extrudes the rack rod 44 out of the expansion slot 45 to be convex, and the clamping and feeding of the embedded reinforcing bar are realized.

[0059] In order to facilitate the telescopic rotation of the drill rod 1 and realize the drill rod 1 as a climbing track after drilling, the push cylinder 41 pushes out the rack rod 44, in order to facilitate the restriction of the rack rod 44 being pushed out of position and facilitate its reset retraction telescopic slot 45, the feeding device 4 further comprises a telescopic hole 46 which is arranged in a rectangular array inside the drill rod 1, and the two ends of the telescopic hole 46 are communicated with the inside of the telescopic slot 45, the inner wall of the telescopic hole 46 is slidably connected with the telescopic rod 47, one side surface of the telescopic rod 47 is fixedly connected with one side surface of the rack rod 44, the outer surface of the telescopic rod 47 is fixedly sleeved with the reset spring 48, the free end of the reset spring 48 is fixedly connected with the inner wall of the telescopic hole 46, when the push cylinder 41 pushes down the adjusting rod 43, the telescopic rod 47 is extruded to be telescopic from the telescopic hole 46 and the reset spring 48 is compressed, so that the rack rod 44 can be tightly pressed under the extrusion force of the reset spring 48, thereby forming the climbing track of the drill rod 1.

[0060] In order to make the rack rod 44 extend out to drive the steel bar clamping device 6 and the anchor device 7 to descend and feed, the feeding device 4 further comprises a climbing ring 49 which is movably sleeved on the outer surface of the drill rod 1, the inner wall of the climbing ring 49 is slidably connected with the inner wall of the key groove through the key rod, one side outer surface of the climbing ring 49 is fixedly connected with the support ear plate 51 which extends out and is arranged in parallel, the surface of the support ear plate 51 is rotatably connected with the climbing gear 52 through the rotating shaft, the outer surface of the climbing gear 52 is engaged with the outer surface of the rack rod 44, the climbing gear 52 on the support ear plate 51 is rotated to drive the climbing ring 49 to descend along the rack rod 44, thereby realizing the vertical feeding of the embedded steel bar, in order to reduce the climbing or descending resistance of the climbing ring 49, one side inner wall of the climbing ring 49 is provided with the roller 50, the outer surface of the roller 50 is in sliding contact with the outer surface of the drill rod 1.

[0061] Because the cave is deep, in order to vertically transport the embedded steel bar to the inner side wall of the cave, the feeding device 4 further comprises a support bottom plate 53 which is fixedly installed on the upper surface of the support ear plate 51, the lower surface of the support bottom plate 53 is rotatably connected with the rotating screw 54 through the mounting plate, the outer surface of the rotating screw 54 is engaged with the outer surface of the climbing gear 52, one end of the lower surface of the support bottom plate 53 is fixedly installed with the rotating motor 55 through the mounting block, the output shaft of the rotating motor 55 is fixedly connected with one side surface of the rotating screw 54 through the shaft coupling, after the climbing gear 52 is engaged with the outer surface of the rack rod 44, the rotating screw 54 is controlled to rotate through the rotating motor 55, thereby driving the climbing gear 52 to rotate, then the climbing gear 52 drives the support bottom plate 53 to descend along the rack rod 44 to the inner bottom wall of the cave, thereby realizing the feeding of the embedded steel bar.

[0062] By setting the feeding device 4, the embedded steel bar can be climbed along the drill pipe 1. During the adjustment, the rotating screw rod 54 is controlled to rotate by rotating the motor 55, and then the rotating screw rod 54 drives the climbing gear 52 to rotate, and then the climbing gear 52 drives the supporting bottom plate 53 to descend along the rack rod 44 to the inner bottom wall of the karst cave, so that the feeding of the embedded steel bar can be realized, and the embedded steel bar is prevented from being inserted obliquely to make the subsequent construction difficult.

[0063] The steel bar clamping device 6 is arranged on the upper surface of one end of the feeding device 4 to clamp the embedded steel bar and then horizontally push the embedded steel bar to the inner wall of the karst cave. The steel bar clamping device 6 includes horizontally distributed symmetrical horizontal sliding rails 61.

[0064] In order to push the embedded steel bar to the inner wall of the karst cave for fitting, the horizontal sliding rails 61 are fixedly installed on the upper surface of the supporting bottom plate 53. The outer surfaces of the horizontal sliding rails 61 are fixedly connected with the supporting sliding blocks 62 which are spaced apart. The upper surfaces of the supporting sliding blocks 62 are fixedly connected with the sliding bottom plates 63. The embedded steel bar can be pushed by sliding the sliding bottom plates 63 to one side. In order to vertically convey the embedded steel bar, the upper surfaces of the sliding bottom plates 63 are fixedly connected with the clamping air cylinders 64. The inner surfaces of the clamping jaws of the clamping air cylinders 64 are fixedly connected with the arc-shaped clamping rings 65. The embedded steel bar is contacted and clamped with the arc-shaped clamping rings 65 of the clamping air cylinders 64 above the karst cave. Then the lower end of the embedded steel bar clamped by the clamping air cylinders 64 can descend to the bottom of the karst cave along with the descending of the climbing gear 52. The limiting rings can be installed on the surfaces of the guide rings to limit and guide the upper end of the embedded steel bar.

[0065] In order to control the sliding bottom plates 63 to push, the steel bar clamping device 6 further includes the moving air cylinder 66 which is fixedly connected to the upper surface of the supporting bottom plate 53. The lower surfaces of the sliding bottom plates 63 are fixedly connected with the piston rod surfaces of the moving air cylinder 66 through the connecting blocks. The moving air cylinder 66 is controlled to act to push the sliding bottom plates 63, so that the supporting sliding blocks 62 on the lower surfaces of the sliding bottom plates 63 move horizontally on the outer surfaces of the horizontal sliding rails 61. Then the embedded steel bar clamped by the clamping air cylinders 64 can be close to the inner wall of the karst cave, and the steel bar can be conveniently fixed.

[0066] By setting the steel bar clamping device 6, the embedded steel bar can be vertically clamped and conveyed to the inner wall of the karst cave. During the adjustment, the lower end of the embedded steel bar clamped by the clamping air cylinders 64 can descend to the bottom of the karst cave along with the descending of the climbing gear 52. The moving air cylinder 66 is controlled to act to push the sliding bottom plates 63, so that the supporting sliding blocks 62 on the lower surfaces of the sliding bottom plates 63 move horizontally on the outer surfaces of the horizontal sliding rails 61. Then the embedded steel bar clamped by the clamping air cylinders 64 can be close to the inner wall of the karst cave, and the steel bar can be conveniently fixed, and the pouring of the karst cave can be facilitated.

[0067] The anchor device 7 is connected with the feeding device 4 and slides on the outer surface of the drill rod 1, and fixes the embedded steel bar on the inner wall of the karst cave.

[0068] In order to simply fix the embedded steel bar, the anchor device 7 further comprises a linkage ring 72 which is the same as the climbing ring 49, one side surface of the linkage ring 72 is fixedly connected with a parallel rod 73, the lower surface of the parallel rod 73 is fixedly connected with the upper surface of the supporting bottom plate 53 and the upper surface of the clamping air cylinder 64 respectively, the anchor device 7 is clamped above the steel bar clamping device 6 through the parallel rod 73, in order to make the anchor plate 71 clamp the embedded steel bar, the upper surface of the parallel rod 73 is slidably connected with a driving shell 74 through a sliding block, the outer surface of the linkage ring 72 is fixedly connected with symmetrically distributed extension plates 75, the upper surface of the extension plate 75 is fixedly connected with an extension cylinder 76, the piston rod surface of the extension cylinder 76 is fixedly connected with one side surface of the driving shell 74, the driving shell 74 is horizontally pushed at a constant speed through the action of the extension cylinder 76, so that the anchor plate 71 can clamp the embedded steel bar, in order to limit the linkage ring 72 and the climbing ring 49 during drilling and avoid affecting the high-speed rotation of the drill rod 1, the lower surface of the guide plate 2 is fixedly connected with symmetrically distributed extension cylinders 77, the lower surface of the piston rod of the extension cylinder 77 is fixedly connected with electromagnets 78, the lower surface of the electromagnet 78 is fixedly connected with the upper surface of the linkage ring 72, when the drill rod 1 drills, the rack rod 44 is retracted into the extension groove 45, and the linkage ring 72 and the climbing ring 49 are fixed on the lower surface of the guide plate 2 through the electromagnet 78.

[0069] In order to fix the embedded steel bar and the inner wall of the karst cave by the anchor plate 71, the anchor device 7 further comprises anchor nails 79 which are rotatably sleeved on both end surfaces of the anchor plate 71, the surfaces of the driving shell 74 are rotatably connected with rotating rods 80 through bearings, the anchor nails 79 are uniformly rotated and advanced into the inner wall of the karst cave, so that the anchor plate 71 is fixed, in order to control the rotation of the anchor nail 79 and fix the embedded steel bar, the outer surfaces of the two rotating rods 80 are provided with belt pulley assemblies 81 which are in transmission, one side surfaces of the two rotating rods 80 are fixedly connected with caps 82, the inner surfaces of the caps 82 are slidably inserted with the outer surfaces of hexagonal nuts of the anchor nails 79, a motor in the driving shell 74 drives one of the rotating rods 80 to rotate, the other rotating rod 80 is synchronously rotated under the linkage of the belt pulley assembly 81, the rotating rod 80 which is inserted on the outer surface of the anchor nail 79 drives the anchor nail 79 to rotate, and under the pushing of the extension cylinder 76, the anchor plate 71 can fix the embedded steel bar.

[0070] By setting the anchor device 7, the embedded steel bar arranged vertically can be quickly and simply fixed, and in the adjusting process, one of the rotating rods 80 in the driving shell 74 is driven to rotate by the motor, the other rotating rod 80 is synchronously rotated under the linkage of the belt pulley assembly 81, the rotating rod 80 inserted on the outer surface of the anchor 79 is driven to rotate, and under the pushing of the extension cylinder 76, the anchor plate 71 can fix the embedded steel bar, and when the drill rod 1 is intermittently rotated at a constant speed, the uniform distribution of the embedded steel bar in the karst cave can be realized.

[0071] Working principle: in the specific embodiment of the present application, the drill rod 1 extends into the inside of the karst cave when drilling, and after the drilling is completed, the drill rod 1 remains in the karst cave, at this time, the adjusting rod 43 is pushed downward by the pushing cylinder 41, the telescopic rod 47 is telescoped from the telescopic hole 46 and compresses the return spring 48, so that the rack rod 44 is pushed out of the telescopic groove 45 and abuts tightly under the extrusion force of the return spring 48.

[0072] Then the telescopic cylinder 77 is controlled to act, the linkage ring 72 and the climbing ring 49 are pushed downward, until the climbing gear 52 meshes with the extended rack rod 44, the adsorption of the electromagnet 78 is released, and the telescopic cylinder 77 is reset;

[0073] Then the arc-shaped clamping ring 65 of the clamping cylinder 64 clamps and fixes the lower end outer surface of the embedded steel bar, and the upper end of the embedded steel bar can be limited and guided by installing the limiting ring on the surface of the guide ring, then the rotating screw 54 is controlled to rotate by the rotating motor 55, so that the rotating screw 54 drives the climbing gear 52 to rotate, and the climbing ring 49 is driven to descend along the rack rod 44, so that the embedded steel bar clamped by the clamping cylinder 64 is pulled into the inner bottom wall of the karst cave;

[0074] Then the moving cylinder 66 is controlled to act, the sliding bottom plate 63 is pushed, the supporting sliding block 62 on the lower surface of the sliding bottom plate 63 moves horizontally on the outer surface of the horizontal sliding rail 61, so that the embedded steel bar clamped by the clamping cylinder 64 approaches the inner wall of the karst cave;

[0075] One of the rotating rods 80 in the driving shell 74 is driven to rotate by the motor, the other rotating rod 80 is synchronously rotated under the linkage of the belt pulley assembly 81, the rotating rod 80 inserted on the outer surface of the anchor 79 is driven to rotate, and under the pushing of the extension cylinder 76, the anchor plate 71 can fix the embedded steel bar;

[0076] Finally, the above actions are repeated, and when the drill rod 1 is intermittently rotated at a constant speed, the uniform distribution of the embedded steel bar in the karst cave can be realized.

[0077] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A method of consolidating a karst roadbed, characterized by: The application relates to a method for filling karst caves and a device thereof. The method comprises the following steps: a, preliminary modeling: according to a geological exploration report, a detection zone is divided, a point is arranged, a pile sound measuring pipe is installed in a borehole, the shape of a karst cave is measured through ultrasonic waves, and modeling is carried out; b, drilling: a hydraulic drilling machine is used to drill the karst cave according to the type of the karst cave; c, steel bar pre-burying: a steel bar clamping device (6) is used to clamp a pre-buried steel bar, a feeding device (4) is used to vertically and linearly feed the clamped pre-buried steel bar along the outer surface of a drill rod (1) of the hydraulic drilling machine to the bottom of the karst cave, and then an anchor nail device (7) is used to simply fix the vertical pre-buried steel bar, so that the pre-buried steel bar is distributed in a ring array in the karst cave through reciprocating actions of the steel bar clamping device (6), the feeding device (4) and the anchor nail device (7); d, filling construction operation: according to the stratum characteristics and engineering requirements, a suitable tamping method is adopted to pour concrete into the karst cave; e, monitoring and maintenance: during the reinforcement construction process, real-time monitoring is carried out, such as ground subsidence and pore water pressure, and maintenance measures are timely taken to ensure the stability and safety of the filling project. The outer surface of the drill rod (1) is movably sleeved with a guide plate (2), the inner surface of the guide plate (2) is rotationally connected with a driving gear (3) through a bearing, the inner side wall of the driving gear (3) drives the drill rod (1) to rotate and descend through the cooperation between a key and a key groove, the feeding device (4) is arranged on the outer surface of the drill rod (1), the steel bar clamping device (6) is arranged on the upper surface of the feeding device (4), and the anchor nail device (7) is arranged on the upper surface of the steel bar clamping device (6) through a supporting rod. The feeding device (4) drives the steel bar clamping device (6) and the anchor nail device (7) to linearly move downwards on the outer surface of the drill rod (1), and the feeding device (4) comprises a rack rod (44) which can stretch and contract on the outer surface of the drill rod (1). The steel bar clamping device (6) clamps the pre-buried steel bar on the upper surface of one end of the feeding device (4), so that the pre-buried steel bar is horizontally pushed to the inner wall of the karst cave, and the steel bar clamping device (6) comprises horizontally distributed symmetrical slide rails (61). The anchor nail device (7) slides up and down on the outer surface of the drill rod (1) in linkage with the feeding device (4), and fixes the pre-buried steel bar on the inner wall of the karst cave, and the anchor nail device (7) comprises an anchor plate (71) which fixes the pre-buried steel bar. ​ ​ ​ ​ The feeding device (4) includes a push air cylinder (41) fixedly installed inside the upper end of the drill rod (1), the inside of the drill rod (1) is provided with a movable cavity (42), the lower surface of the piston rod of the push air cylinder (41) extends into the inside of the movable cavity (42), and the lower surface of the piston rod of the push air cylinder (41) is fixedly connected with an adjusting rod (43) with a circular-arc convex side surface through a connecting rod, the outer surface of the adjusting rod (43) is slidably connected with the inner wall of the movable cavity (42), and the outer surface of the adjusting rod (43) is slidably connected with the inner wall of the movable cavity (42). The feeding device (4) further includes a telescopic hole (46) provided in the inside of the drill rod (1) in a rectangular array, and the two ends of the telescopic hole (46) communicate the inside of the movable cavity (42) with the inside of the telescopic groove (45), the inner wall of the telescopic hole (46) is slidably connected with a telescopic rod (47), one side surface of the telescopic rod (47) is fixedly connected with one side surface of the rack rod (44), and the outer surface of the telescopic rod (47) is fixedly sleeved with a return spring (48), and the free end of the return spring (48) is fixedly connected with the inner wall of the telescopic hole (46). The feeding device (4) further includes a climbing ring (49) movably sleeved on the outer surface of the drill rod (1), the inner side wall of the climbing ring (49) is slidably connected with the inner wall of the key groove through a key rod, one side inner wall of the climbing ring (49) is provided with a roller (50), the outer surface of the roller (50) is in sliding contact with the outer surface of the drill rod (1), one side outer surface of the climbing ring (49) is fixedly connected with a support lug (51) extending out and arranged in parallel, the surface of the support lug (51) is rotatably connected with a climbing gear (52) through a rotating shaft, and the outer surface of the climbing gear (52) is engaged with the outer surface of the rack rod (44). The feeding device (4) further includes a support base plate (53) fixedly installed on the upper surface of the support lug (51), the lower surface of the support base plate (53) is rotatably connected with a rotating screw rod (54) through a mounting plate, the outer surface of the rotating screw rod (54) is engaged with the outer surface of the climbing gear (52), and one end of the lower surface of the support base plate (53) is fixedly installed with a rotating motor (55) through a mounting block, and the outer surface of the output shaft of the rotating motor (55) is fixedly connected with one side surface of the rotating screw rod (54) through a shaft coupling.

2. The method of claim 1, wherein: The horizontal sliding rail (61) is fixedly installed on the upper surface of the support base plate (53), the outer surface of the horizontal sliding rail (61) is fixedly connected with support sliding blocks (62) in a spaced distribution, the upper surface of the support sliding block (62) is fixedly connected with a sliding base plate (63), the upper surface of the sliding base plate (63) is fixedly connected with a clamping air cylinder (64), and the inner surface of the clamping jaw of the clamping air cylinder (64) is fixedly connected with an arc-shaped clamping ring (65).

3. The method of claim 2, wherein: The reinforcing steel bar clamping device (6) further comprises a moving air cylinder (66) fixedly connected to the upper surface of the support bottom plate (53), and the piston rod surface of the moving air cylinder (66) is fixedly connected to the lower surface of the sliding bottom plate (63) through a connecting block.

4. The method of claim 3, wherein: The anchor device (7) further comprises a linkage ring (72) with the same specifications as the climbing ring (49), one side surface of the linkage ring (72) is fixedly connected with a parallel rod (73), the lower surfaces of the parallel rod (73) are fixedly connected with the upper surfaces of the support bottom plate (53) and the clamping air cylinder (64) respectively, the upper surface of the parallel rod (73) is slidably connected with a driving shell (74) through a sliding block, the outer surface of the linkage ring (72) is fixedly connected with symmetrically distributed extension plates (75), the upper surfaces of the extension plates (75) are fixedly connected with extension air cylinders (76), the piston rod surfaces of the extension air cylinders (76) are fixedly connected with one side surfaces of the driving shell (74), the lower surface of the guide plate (2) is fixedly connected with symmetrically distributed telescopic air cylinders (77), the piston rod lower surfaces of the telescopic air cylinders (77) are fixedly connected with electromagnets (78), and the lower surfaces of the electromagnets (78) are fixedly connected with the upper surfaces of the linkage ring (72).

5. The method of claim 4, wherein: The anchor device (7) further comprises anchors (79) rotatably sleeved on both end surfaces of the anchor plate (71), the surfaces of the driving shell (74) are rotatably connected with rotating rods (80) through bearings, the outer surfaces of the two rotating rods (80) are provided with belt pulley assemblies (81) for transmission, one side surfaces of the two rotating rods (80) are fixedly connected with caps (82), and the inner surfaces of the caps (82) are slidably inserted with the outer surfaces of hexagonal nuts of the anchors (79).

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