A karst cave detection device for underground space construction

Abstract

The present invention discloses a device for detecting karst caves in underground space construction, comprising a box body, a column fixedly connected to the upper side of the box body, at least three drilling devices arranged in a circular array at the upper ends of the columns, each drilling device comprising a multi-stage telescopic rod, the end of the multi-stage telescopic rod fixedly connected to a vertical rod, a slide groove provided on one side of the vertical rod, a slider slidably connected in the slide groove, a support plate fixedly connected to one side of the slider, the support plate rotatably connected to a drill pipe, the inner cavity of the drill pipe fixedly connected to a hollow tube, the lower end of the hollow tube threadedly connected to a drill bit or a protective cover, a sonar probe installed in the protective cover. The present invention uses at least three drilling devices, at least three drilling devices distributed at different positions with the box body as the center, and the multi-stage telescopic rod can be extended and retracted to change the drilling position, so that the detection coverage range is large, the selected position is first detected by ground penetrating radar to determine the depth of the karst cave, and then drilling is performed, and the selected drilling depth allows the sonar probe to enter the range of the karst cave.

Description

Technical Field

[0001] The present invention relates to the technical field of geological detection, and in particular to a karst cave detection device for underground space construction. Background Art

[0002] With the acceleration of urbanization, the space available for development and utilization on the ground is becoming increasingly smaller, and it has become a consensus among people to develop underground. Before constructing underground space by tunneling or shield construction, geological conditions need to be detected. As a hazardous geological condition, karst caves are prone to cause safety hazards to construction, such as Figure 6 As shown in the figure, the undulations at the top or bottom of the cave will cause obstructions, resulting in low detection efficiency at a single measurement point, which will affect the detection of the cave boundary. In addition, soil blocks may fall from the drilling hole and collide with the probe, causing damage. Summary of the Invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a cave detection device for underground space construction.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A device for detecting karst caves in underground space construction comprises a box body, the upper side of which is fixedly connected to a column, at least three drilling devices are arranged in a circular array on the upper end of the column, each drilling device comprises a multi-stage telescopic rod, the end of the multi-stage telescopic rod is fixedly connected to a vertical rod, one side of the vertical rod is provided with a slide groove, a slider is slidably connected in the slide groove, one side of the slider is fixedly connected to a support plate, the support plate is rotatably connected to a drill pipe, the inner cavity of the drill pipe is fixedly connected to a hollow tube, the lower end of the hollow tube is threadedly connected to a drill bit or a protective cover, and a sonar probe is installed in the protective cover;

[0006] One side of the vertical rod is fixedly connected to the control box, and a cable is installed between the control box and the protective cover, and the cable can pass through the inner cavity of the hollow tube;

[0007] The slide block is driven to slide by a driving device.

[0008] Preferably, the bottom of the support plate is fixedly connected to a driving motor, the main shaft of the driving motor is fixed with a gear, the upper end of the drill pipe is fixedly connected to an outer gear ring, and the outer gear ring is meshed with the gear.

[0009] Preferably, the drill bit includes a connecting column, which is threadedly connected to the lower end of the hollow tube. The lower end of the connecting column is fixedly connected to a disc, and a cutting edge is provided at the bottom of the disc.

[0010] Preferably, the upper end of the drill pipe is provided with an internal thread, and the lower end of the drill pipe is provided with cutting teeth;

[0011] A column is provided at the upper end of the hollow tube, the column is threadedly connected to the upper end of the drill pipe, the hollow tube slides through the column, a threaded hole is provided on the side of the column, a locking screw is threadedly connected in the threaded hole, a boss is provided at the upper end of the hollow tube, and a support spring is provided between the boss and the column;

[0012] The protective cover includes a connecting pipe, which is threadedly connected to the lower end of the hollow pipe. At least three mounting grooves are arranged in a circular array at the bottom of the connecting pipe. A support rod is hinged in each mounting groove, and a torsion spring is installed on the hinge axis of the support rod so that the support rod rotates outward after passing through the drill pipe. The outer sides of at least three support rods are fixedly connected to the rubber cover.

[0013] Preferably, the upper end of each support rod is fixedly connected to the pressure rod, the inner wall of the drill pipe is provided with a convex ring, the upper end of the connecting tube is fixedly connected to the circular ring, the middle part of the connecting tube is slidably connected to the casing, the lower end of the casing is a conical surface, the pressure rod slides and contacts the conical surface of the casing, the first spring is fixedly connected between the circular ring and the casing, the outer side of the casing is fixedly connected to the side rod, and the side rod is arranged corresponding to the convex ring.

[0014] Preferably, the upper side of the box body is rotatably connected to a circular ring, one side of the circular ring is fixedly connected to a square tube, one end of the square tube is slidably connected to a square rod, the end of the square rod is fixedly connected to a pressure block, and inclined surfaces are respectively provided on both sides of the bottom of the pressure block. One side of the boss is rotatably connected to the circular tube, and the pressure block can squeeze the circular tube when the circular ring rotates.

[0015] Preferably, the driving device is a motor screw pair, a pneumatic cylinder or a hydraulic cylinder.

[0016] The advantages of the present invention are that: the cave detection device provided by the present invention is used for underground space construction through at least three drilling devices, and the at least three drilling devices are distributed in different positions with the box as the center, and the multi-stage telescopic rod can be telescoped to change the drilling position, so that the detection coverage range is large. The depth of the cave is first detected by ground penetrating radar at the selected position, and then drilling is carried out. The selected drilling depth allows the sonar probe to enter the cave range.

[0017] The present invention rotates the circular ring, and the square rod presses the corresponding hollow tube downward, so that only the sonar probe installed in the hollow tube squeezed by the pressing block will be exposed to the lower end of the drill pipe. The sonar probes in multiple drill pipes are extended one by one for detection, and the detection ranges are finally pieced together, thereby forming a more comprehensive detection range result, avoiding the situation where the detected cave is partially unclear, and improving the detection quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a basic structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the drill pipe running down the hole according to the present invention;

[0020] Figure 3 yes Figure 2 A local enlarged view of point E in FIG;

[0021] Figure 4 This is a schematic diagram of the internal structure of the drill pipe of the present invention;

[0022] Figure 5 It is a schematic diagram of the internal structure of the protective cover of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of an underground cave. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] Example 1

[0026] like Figure 1-5 As shown, the present invention provides a device for detecting karst caves in underground space construction, including a box body 1, a column 11 fixedly connected to the upper side of the box body 1, at least three drilling devices are arranged in a circular array on the upper end of the column 11, each drilling device includes a multi-stage telescopic rod 2, the multi-stage telescopic rod 2 is hydraulic, the end of the multi-stage telescopic rod 2 is fixedly connected to the vertical rod 3, a slide groove 31 is provided on one side of the vertical rod 3, a slider 32 is slidably connected in the slide groove 31, and the slider 32 is driven to slide by a driving device, and the driving device is a motor screw A pair, a pneumatic cylinder or a hydraulic cylinder, one side of the slider 32 is fixedly connected to the support plate 33, the support plate 33 is rotatably connected to the drill pipe 4, the bottom of the support plate 33 is fixedly connected to the drive motor 331, the main shaft of the drive motor 331 is fixed to the gear 332, the upper end of the drill pipe 4 is fixedly connected to the outer gear ring 333, the outer gear ring 333 is meshed with the gear 332, the inner cavity of the drill pipe 4 is fixedly connected to the hollow tube 5, the lower end of the hollow tube 5 is threadedly connected to the drill bit 6 or the protective cover 7, and the protective cover 7 is equipped with a sonar probe 711;

[0027] One side of the vertical rod 3 is fixedly connected to the control box 8. A cable is installed between the control box 8 and the sonar probe 711. The cable can pass through the inner cavity of the hollow tube 5. Sonar detection belongs to the existing technology, so its specific principle will not be described here.

[0028] The drill bit 6 includes a connecting column, which is threadedly connected to the lower end of the hollow tube 5. The lower end of the connecting column is fixedly connected to a disc, and a cutting edge is provided at the bottom of the disc. The cutting edge of the disc and the bottom forms a blockage for the lower end of the drill pipe 4.

[0029] The upper end of the drill pipe 4 is provided with an internal thread, the lower end of the drill pipe 4 is provided with cutting teeth 41, and the upper end of the hollow tube 5 is provided with a column 51, and the column 51 is threadedly connected to the upper end of the drill pipe 4.

[0030] Before constructing underground space by concealed excavation or shield construction, geological conditions need to be detected. As a hazardous geological condition, karst caves can easily pose a safety hazard to construction. The present invention uses at least three drilling devices, which are distributed at different positions with the box 1 as the center. The multi-stage telescopic rod 2 can be telescoped to change the drilling position, so that the detection coverage range is large. The depth of the karst cave is first determined by ground penetrating radar at the selected location, and then drilling is carried out. The selected drilling depth allows the sonar probe 711 to enter the karst cave range.

[0031] The drill bit 6 is first installed in the hollow tube 5 inside the drill pipe 4. When each drilling device drives the slide 32 downward through the driving device, the driving motor 331 drives the drill pipe 4 to rotate through the gear 332 and the outer gear ring 333. The cutting teeth 41 of the drill pipe 4 and the drill bit 6 work together to form a hole in the ground.

[0032] After the hole is formed, the hollow tube 5 is separated from the drill pipe 4 by the column 51, the drill bit 6 is removed and a protective cover 7 is installed at the lower end of the hollow tube 5. The hollow tube 5 and the protective cover 7 form protection for the inserted sonar probe 711, which facilitates the protective cover 7 to be sent into the underground cave position, and through at least three position points, each position point radiates the surroundings during detection, which can avoid the obstruction of the undulations at the top or bottom of the cave, thereby facilitating the exploration of the boundary of the cave and facilitating the subsequent reinforcement and management of the cave range.

[0033] Example 2

[0034] In this embodiment, Figure 1-5 As shown, the hollow tube 5 slides through the column 51. A threaded hole is provided on the side of the column 51. A locking screw is connected to the threaded hole. A boss 52 is provided on the upper end of the hollow tube 5. A support spring 53 is provided between the boss 52 and the column 51. When the drill bit 6 is installed, the hollow tube 5 is locked by the locking screw. When the sonar probe 711 is replaced, the locking screw is removed and the hollow tube 5 can slide relative to the column 51, which facilitates the adjustment of the depth of the sonar probe 711.

[0035] The protective cover 7 includes a connecting pipe 71, which is threadedly connected to the lower end of the hollow tube 5. At least three mounting grooves 72 are arranged in a circular array at the bottom of the connecting pipe 71. A support rod 73 is hinged in each mounting groove 72, and a torsion spring is installed on the hinge axis of the support rod 73 so that the support rod 73 rotates outward after passing through the drill pipe 4. The outer sides of at least three support rods 73 are fixedly connected to a rubber cover 74.

[0036] The upper end of each support rod 73 is fixedly connected to a pressure rod 75, and a convex ring 76 is provided on the inner wall of the drill pipe 4. The upper end of the connecting tube 71 is fixedly connected to a circular ring 77, and the middle part of the connecting tube 71 is slidably connected to a sleeve 78. The lower end of the sleeve 78 is a conical surface 79, and the pressure rod 75 slides in contact with the conical surface 79 of the sleeve 78. A first spring 791 is fixedly connected between the circular ring 77 and the sleeve 78, and a side rod 792 is fixedly connected to the outer side of the sleeve 78. The side rod 792 is arranged corresponding to the convex ring 76.

[0037] When the protective cover 7 is in use, at least three support rods 73 are first gathered inward so that they can enter the drill pipe 4 together. The hollow tube 5 is gradually lowered along the guide of the drill pipe 4. When the support rods 73 are exposed from the lower end of the drill pipe 4, under the action of the torsion spring, the lower end of each support rod 73 moves outward, expanding the rubber cover 74 to form a cover body to protect the sonar probe 711.

[0038] Since the bottom of the drill pipe 4 is provided with cutting teeth 41, if the support rod 73 were to open directly after drilling out of the drill pipe 4, it would cause the rubber cover 74 to be scratched, thus losing its protective function. The conical surface 79 of the sleeve 78 is first positioned between the pressure rod 75 and the connecting tube 71 to provide support. After the support rod 73 extends out of the drill pipe 4, the side rod 792 is blocked by the convex ring 76 and stops, while the connecting tube 71 continues to move downward, causing the conical surface 79 of the sleeve 78 to gradually move away from the pressure rod 75. Under the action of the torsion spring, the support rod 73 rotates outward, thereby delaying its deployment and preventing the rubber cover 74 from being scratched.

[0039] Example 3

[0040] In this embodiment, Figure 1-5 As shown, the upper side of the box body 1 is rotatably connected to the circular ring 811, one side of the circular ring 811 is fixedly connected to the square tube 81, one end of the square tube 81 is slidably connected to the square rod 82, and the end of the square rod 82 is fixedly connected to the pressure block 83. The pressure block 83 can be fixed by screws, which is convenient for replacing pressure blocks 83 of different thicknesses. Inclined surfaces 84 are respectively provided on both sides of the bottom of the pressure block 83. One side of the boss 52 is rotatably connected to the circular tube 85, and the pressure block 83 can squeeze the circular tube 85 when the circular ring 811 rotates.

[0041] All the sonar probes 711 are placed in the cave, and there will be some obstruction between them. Through the rotation of the circular ring 811, the square rod 82 presses down the corresponding hollow tube 5, so that only the sonar probe 711 installed inside the hollow tube 5 squeezed by the pressing block 83 will be exposed at the lower end of the drill pipe 4. By extending the sonar probes 711 in multiple drill pipes 4 one by one for detection, the detection range is finally pieced together, thereby forming a more comprehensive detection range result, avoiding the situation where the detected part of the cave is unclear, and improving the detection quality.

[0042] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting karst caves in underground space construction, comprising a box (1), a column (11) fixedly connected to the upper side of the box (1), and at least three drilling devices arranged in a circular array at the upper end of the column (11), characterized in that: Each drilling device includes a multi-stage telescopic rod (2), the end of the multi-stage telescopic rod (2) is fixedly connected to the vertical rod (3), a slide groove (31) is provided on one side of the vertical rod (3), a slider (32) is slidably connected in the slide groove (31), one side of the slider (32) is fixedly connected to a support plate (33), the support plate (33) is rotatably connected to the drill pipe (4), the inner cavity of the drill pipe (4) is fixedly connected to the hollow tube (5), the lower end of the hollow tube (5) is threadedly connected to the protective cover (7), and the protective cover (7) is equipped with a sonar probe (711); One side of the vertical rod (3) is fixedly connected to the control box (8), and a cable is installed between the control box (8) and the protective cover (7), and the cable can pass through the inner cavity of the hollow tube (5); The slider (32) is driven to slide by a driving device; The bottom of the support plate (33) is fixedly connected to a driving motor (331), the main shaft of the driving motor (331) is fixed to a gear (332), the upper end of the drill pipe (4) is fixedly connected to an outer gear ring (333), and the outer gear ring (333) is meshed with the gear (332); The upper end of the drill pipe (4) is provided with an internal thread, and the lower end of the drill pipe (4) is provided with cutting teeth (41); A column (51) is provided at the upper end of the hollow tube (5), and the column (51) is threadedly connected to the upper end of the drill pipe (4). The hollow tube (5) slides through the column (51). A threaded hole is provided on the side of the column (51), and a locking screw is threadedly connected in the threaded hole. A boss (52) is provided at the upper end of the hollow tube (5), and a support spring (53) is provided between the boss (52) and the column (51); The protective cover (7) includes a connecting pipe (71) which is threadedly connected to the lower end of the hollow pipe (5). At least three mounting grooves (72) are provided in a circular array at the bottom of the connecting pipe (71). A support rod (73) is hinged in each mounting groove (72). A torsion spring is provided on the hinge shaft of the support rod (73) so that the support rod (73) rotates outward after passing through the drill pipe (4). The outer sides of at least three support rods (73) are fixedly connected to a rubber cover (74). The upper end of each support rod (73) is fixedly connected to a pressure rod (75), and a convex ring (76) is provided on the inner wall of the drill pipe (4). The upper end of the connecting pipe (71) is fixedly connected to a circular ring (77). The middle part of the connecting pipe (71) is slidably connected to a sleeve (78). The lower end of the sleeve (78) is a conical surface (79). The pressure rod (75) slides in contact with the conical surface (79) of the sleeve (78). A first spring (791) is fixedly connected between the circular ring (77) and the sleeve (78). The outer side of the sleeve (78) is fixedly connected to a side rod (792), and the side rod (792) is correspondingly arranged with the convex ring (76).

2. The device for detecting karst caves in underground space construction according to claim 1, characterized in that: The upper side of the box body (1) is rotatably connected to a circular ring (811), one side of the circular ring (811) is fixedly connected to a square tube (81), one end of the square tube (81) is slidably connected to a square rod (82), the end of the square rod (82) is fixedly connected to a pressing block (83), and both sides of the bottom of the pressing block (83) are respectively provided with inclined surfaces (84), and one side of the boss (52) is rotatably connected to a circular tube (85), and the pressing block (83) can squeeze the circular tube (85) when the circular ring (811) rotates.

3. The device for detecting karst caves in underground space construction according to claim 1, characterized in that: The driving device is a motor screw pair, a cylinder or a hydraulic cylinder.

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