Segmented plugging device and method for karst cave and karst cavity of highway tunnel

Abstract

The invention relates to the technical field of tunnel mining, and particularly discloses a highway tunnel karst cave cavity segmented plugging device and method.The highway tunnel karst cave cavity segmented plugging device comprises a pouring assembly and a sealing plate, the sealing plate is used for segmenting a karst cavity and achieving segmented plugging, and the top of the sealing plate is provided with a fixing piece used for fixing the sealing plate. The uniform spraying assemblies are arranged on the inner side and the upper portion of the sealing plate, the uniform spraying assemblies are used for uniformly spraying slurry for plugging to the inner wall of the karst cave, each uniform spraying assembly comprises a fixing pipe fixed to the inner side of the sealing plate, a rotating disc is arranged on the inner side of each fixing pipe, a lifting pipe is arranged in each rotating disc, and a rotating connector is installed at the top of each lifting pipe. Impact vibration caused by the fact that grout centrally falls on the bottom of the karst cave can be avoided, the possibility of collapse in the karst cave is reduced, the construction safety is improved, meanwhile, the adhesion between mortar and the inner wall of the karst cave during later grouting can be improved, and the firmness of mortar filling can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel mining, and in particular to a device and method for segmented plugging of karst caves and cavities in highway tunnels. Background Art

[0002] Since the 21st century, my country's transportation industry has developed rapidly, and the number of tunnel projects has increased significantly. Mountain tunnels are an important part of the entire line. When passing through karst areas, mountain tunnels are easily affected by adverse geological conditions such as fault fracture zones, strongly weathered intrusion zones and filled karst. The filling medium inside the cavity is often connected to underground pressurized water. Under such geological conditions, tunnel construction often involves the risk of water and mud bursts, which can seriously lead to personal injury, mechanical damage, economic losses, and delays in construction schedule. This will bring significant safety hazards to tunnel construction. Grouting is usually used to fill the caves, but the caves are interconnected. During the grouting process, the slurry will flow into the interior of the channel connected to the cave, resulting in very low efficiency when grouting to seal the target cave.

[0003] Announcement No. CN218151043U discloses a segmented sealing device for a tunnel cave cavity, which uses sealing plates to separate the cave from the channel connected to it, realizes the closed division of each space, and realizes segmented sealing. However, when the traditional sealing is performed, the injected slurry falls to the bottom of the cave, resulting in uneven distribution of mortar during grouting. At the same time, the mortar sprays out and falls to the bottom of the cave, which will cause certain impact damage to the cave. In severe cases, it will cause the interior of the cave to collapse, posing certain safety hazards. Summary of the Invention

[0004] The purpose of the present invention is to provide a segmented sealing device and method for a highway tunnel cave cavity, which can avoid the concentrated slurry falling on the bottom of the cave and causing impact vibration, reduce the possibility of collapse inside the cave, and improve construction safety. At the same time, it can also improve the adhesion between the mortar and the inner wall of the cave during the later grouting and improve the firmness of the mortar filling, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a segmented plugging device for a karst cave in a highway tunnel, comprising a pouring assembly and a sealing plate, wherein the sealing plate is used to segment the karst cave to achieve segmented plugging, and a fixing member for fixing the sealing plate is disposed on the top of the sealing plate, characterized in that the segmented plugging device further comprises:

[0006] The uniform spray assembly is arranged on the inner side and above the sealing plate, and is used to uniformly spray the slurry used for plugging onto the inner wall of the cave. The uniform spray assembly includes a fixed pipe fixed to the inner side of the sealing plate, a turntable is arranged inside the fixed pipe, a lifting pipe is arranged inside the turntable, a rotary joint is installed on the top of the lifting pipe, and a connecting pipe is arranged between the rotary joint and the perfusion assembly;

[0007] The telescopic tube assembly is arranged at the bottom of the ring side of the lifting tube. The telescopic tube assembly is retractable as a whole. When the slurry used for sealing is sprayed, the spray outlet is closer to the inner wall of the cave. The telescopic tube assembly includes a small frame fixedly connected to the outer wall of the lifting tube. The inside of the small frame is rotatably connected to the main tube. The outer wall of the main tube is slidably connected to the connecting frame. The connecting frame is fixedly connected to the outlet pipe. A first flexible pipe is inserted between the outlet pipe and the main tube, and a second flexible pipe is inserted between the main tube and the lifting tube.

[0008] Preferably, the telescopic tube assembly further comprises:

[0009] The electromagnet is fixed to the outer wall of the main pipe, and the connecting frame is made of iron material near the electromagnet;

[0010] The fixed ring is fixed to the outer wall of the lifting tube. The outer side of the fixed ring is rotatably connected to the slide. The slide is slidably connected to the fixed tube. The fixed ring annular array is installed with a self-resetting switch. The inner annular array of the slide is fixed with an electric telescopic rod. The output shaft of the electric telescopic rod is fixedly connected to the extrusion block.

[0011] Preferably, both sides of the extrusion block are inclined.

[0012] Preferably, long plates are fixed at both the front and rear ends of the rotary joint, a hydraulic rod is fixedly connected to the top of the rear end of the sealing plate, and the output shaft of the hydraulic rod is fixedly connected to the long plate at the rear end.

[0013] Preferably, the segmented blocking device further comprises:

[0014] The adjusting assembly is arranged inside the fixed tube. The adjusting assembly includes a small ring frame slidably connected to the bottom of the outer wall of the lifting tube. The top of the small ring frame is fixedly connected to an extrusion ring. The inner top of the extrusion ring is chamfered. The top of the extrusion ring is fixedly connected to a small rod. The top of the small rod passes through the turntable, and the top of the small rod is threaded. A bolt is threadedly connected to the thread at the top of the small rod, and the bottom of the bolt is fixedly connected to a limiting tube.

[0015] Preferably, the top of the turntable is slidably connected to the position of the limiting tube with a lifting plate, the bottom of the lifting plate is fixedly connected to a tilting block, the position of the turntable corresponding to the tilting block is slidably connected to an extrusion frame, and small blocks are fixed to the inner annular array of the fixed tube.

[0016] Preferably, both sides of the small block are inclined, and both sides of the extrusion frame are rotatably connected with balls for reducing friction.

[0017] Preferably, the inner side of the small ring frame is fixedly connected to a bent frame, the bent frame extends into the interior of the lifting tube and is fixedly connected to a blocking ring, the inner wall of the lifting tube is located below the blocking ring and is fixedly connected to the blocking frame, the top of the blocking frame is slidably connected to a blocking plate, and a U-shaped spring piece is fixedly connected between the blocking plate and the blocking frame.

[0018] Preferably, the inner side of the fixed tube is fixedly connected to a motor, the top of the turntable is fixedly connected to a mounting tube, the outer side of the mounting tube and the output shaft of the motor are fixedly connected to gears, and the two gears are meshed with each other.

[0019] A method for segmented plugging of a karst cave cavity in a highway tunnel comprises the following steps:

[0020] S1, segmentation, installing the sealing plate in the cave through the fixing parts to achieve segmentation of the cave;

[0021] S2. Grouting: injecting slurry into the interior of the cave through the injection assembly.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The coordination of the uniform spray assembly and the telescopic tube assembly can prevent the slurry from falling on the bottom of the cave and causing impact vibration, reduce the possibility of collapse inside the cave, and improve construction safety. At the same time, it can also improve the adhesion between the mortar and the inner wall of the cave during the later grouting process and improve the firmness of the mortar filling;

[0024] 2. When the lifting pipe rotates to spray out the slurry, the centrifugal force of the rotating outlet pipe can cause the connecting frame to slide away from the small frame, and the first flexible tube is straightened, so that the outlet pipe sprays out close to the side wall of the cave, further improving the adhesion between the mortar and the inner wall of the cave and improving the firmness of the mortar filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A structural view of the perfusion assembly of the present invention;

[0027] Figure 2 It is an overall structural view of the present invention;

[0028] Figure 3 It is a schematic diagram of the partial structure of the fixed pipe of the present invention;

[0029] Figure 4 It is a rear structural schematic diagram of the fixed tube of the present invention;

[0030] Figure 5 Schematic diagram of a half-section structure of a fixed tube of the present invention;

[0031] Figure 6 For the present invention Figure 5 A magnified view of point A;

[0032] Figure 7 is a schematic diagram of a partial structure of a first flexible tube of the present invention;

[0033] Figure 8 Schematic diagram of a half-section structure of the lifting tube of the present invention;

[0034] Figure 9 It is a partial half-section structural schematic diagram of the lifting tube of the present invention;

[0035] Figure 10 Schematic diagram of a top cross-sectional view of the slide of the present invention;

[0036] Figure 11 It is a partial structural schematic diagram of the blocking plate of the present invention;

[0037] Figure 12 It is a partial structural schematic diagram of the extrusion frame of the present invention.

[0038] Description of reference numerals:

[0039] 1. Infusion assembly; 2. Closing plate; 3. Fixing piece; 4. Spray assembly; 41. Fixing pipe; 42. Turntable; 43. Lifting pipe; 44. Rotary joint; 5. Telescopic pipe assembly; 51. Small frame; 52. Main pipe; 53. Connecting frame; 54. Outlet pipe; 55. First flexible pipe; 56. Second flexible pipe; 57. Electromagnet; 58. Fixing ring; 59. Slide; 510. Self-reset switch; 511. Electric telescopic rod; 512 , extrusion block; 6, adjustment assembly; 61, small ring frame; 62, extrusion ring; 63, small rod; 64, bolt; 65, limiting tube; 66, lifting plate; 67, tilting block; 68, extrusion frame; 69, small block; 610, round ball; 7, bending frame; 8, blocking ring; 9, blocking frame; 10, blocking plate; 11, long plate; 12, hydraulic rod; 13, motor; 14, mounting tube; 15, gear; 16, connecting tube; 17, U-shaped spring piece. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] Example 1: Please refer to Figures 1 to 11The present invention provides a technical solution: a segmented plugging device for a karst cave in a highway tunnel, comprising a grouting assembly 1 and a sealing plate 2. The grouting assembly 1 is a mature existing technology and will not be described in detail. It includes but is not limited to a screw-type grouting pump. The sealing plate 2 is used to segment the karst cave to achieve segmented plugging. The top of the sealing plate 2 is provided with a fixing member 3 for fixing the sealing plate 2. The segmented plugging device also includes a uniform spraying assembly 4 arranged on the inner side and above the sealing plate 2. The uniform spraying assembly 4 is used to evenly spray the slurry used for plugging onto the inner wall of the karst cave. The uniform spraying assembly 4 includes a fixed pipe 41 fixed to the inner side of the sealing plate 2, a turntable 42 is rotatably connected to the inner side of the fixed pipe 41, and a lifting pipe 43 is slidably connected to the inside of the turntable 42. A rotary joint 44 is installed on the top of the lifting pipe 43, and a connecting pipe 16 is fixedly connected between the rotary joint 44 and the grouting assembly 1. The connecting pipe 16 is made of flexible material. The segmented plugging device also includes a ring bottom of the lifting pipe 43. The telescopic tube assembly 5 of the part is telescopic as a whole. When the slurry used for sealing is sprayed, the ejection outlet is closer to the inner wall of the cave. The telescopic tube assembly 5 includes a small frame 51 fixedly connected to the outer wall of the lifting tube 43. The internal rotation of the small frame 51 is connected to the main pipe 52. The outer wall of the main pipe 52 is slidably connected to the connecting frame 53. The connecting frame 53 is fixedly connected to the outlet pipe 54. A first flexible pipe 55 is inserted between the outlet pipe 54 and the main pipe 52. A second flexible pipe 56 is inserted between the main pipe 52 and the lifting tube 43. Long plates 11 are fixed at the front and rear ends of the rotary joint 44. A hydraulic rod 12 is fixedly connected to the top of the rear end of the sealing plate 2. The output shaft of the hydraulic rod 12 is fixedly connected to the long plate 11 at the rear end. The inside of the fixed tube 41 is fixedly connected to the motor 13. The top of the turntable 42 is fixedly connected to the mounting tube 14. The outer side of the mounting tube 14 and the output shaft of the motor 13 are fixedly connected to the gear 15, and the two gears 15 are meshed with each other.

[0042] The rotary joint 44 is a mature existing technology, which can ensure the sealed transportation of the plugging slurry without affecting the rotation of the lifting pipe 43.

[0043] By adopting the above technical solution, the fixing part 3 is composed of a bent rod and an insert rod. The bent rod is fixedly connected to the top of the sealing plate 2, and the insert rod is threadedly connected to the bent rod. When the sealing plate 2 is installed, the sealing plate 2 is placed in the position where the cave needs to be sealed in sections, and the insert rod is rotated by an external tool. Under the action of the threaded connection, the insert rod produces a linear motion, and the insert rod can be inserted into the inner wall of the cave, so as to fix the sealing plate 2, and then the cave is sealed at the position below the sealing plate 2. After the sealing is completed, the sealing plate 2 is installed at a higher position in the cave to seal the next section of the cave. Such a design can realize the segmented sealing of the cave, and the segmented sealing can be processed section by section, reducing the disturbance of the rock mass by a single project and reducing safety hazards.

[0044] After the sealing plate 2 is installed, when it is necessary to pour slurry into the interior of the cave, the output shaft of the hydraulic rod 12 is contracted, so that the long plate 11 moves downward with the rotary joint 44, so that the lifting pipe 43 moves downward with the telescopic pipe assembly 5, and then the main pipe 52 rotates with the connecting frame 53 and the outlet pipe 54, so that the main pipe 52, the connecting frame 53 and the outlet pipe 54 are in a horizontal state. At this time, the output shaft of the motor 13 is rotated, so that the gear 15 fixed to the output shaft of the motor 13 can be rotated. Under the action of the mutual engagement of the two gears 15, the gear 15 fixed on the mounting pipe 14 is rotated with the mounting pipe 14, so that the turntable 42 can rotate with the lifting pipe 43, so that the lifting pipe 43 rotates with the main pipe 52, the connecting frame 53 and the outlet pipe 54.

[0045] The filling slurry injected through the grouting assembly 1 enters the interior of the connecting pipe 16, and enters the interior of the rotary joint 44 and the lifting pipe 43 through the connecting pipe 16, and enters the interior of the main pipe 52 through the second flexible pipe 56, and enters the outlet pipe 54 through the first flexible pipe 55, and then is ejected from the end of the outlet pipe 54. While the slurry is being ejected, the lifting pipe 43 rotates so that the slurry is ejected from different angles, so as to improve the uniformity of the slurry ejection and make the ejected slurry evenly adhere to the interior of the cave.

[0046] While spraying the slurry, the output shaft of the hydraulic rod 12 can be reciprocated and extended, so that the long plate 11 can move up and down with the rotary joint 44 and the lifting tube 43, and the slurry can be sprayed from different heights, further improving the uniformity of the slurry spraying. Such a design can avoid the slurry from falling on the bottom of the cave and causing impact vibration, reduce the possibility of collapse inside the cave, improve construction safety, and at the same time improve the adhesion between the mortar and the inner wall of the cave during the later grouting, and improve the firmness of the mortar filling.

[0047] When the lifting pipe 43 rotates to spray out the slurry, under the action of the centrifugal force of the rotation of the outlet pipe 54, the connecting frame 53 can slide away from the small frame 51, and the first flexible tube 55 is straightened, so that the position where the outlet pipe 54 sprays out is close to the side wall of the cave, further improving the adhesion between the mortar and the inner wall of the cave and improving the firmness of the mortar filling.

[0048] The telescopic tube assembly 5 also includes an electromagnet 57 fixed to the outer wall of the main tube 52, and the connecting frame 53 is made of iron material near the electromagnet 57. The telescopic tube assembly 5 also includes a fixed ring 58 fixed to the outer wall of the lifting tube 43. The outer side of the fixed ring 58 is rotatably connected to a slide 59, and the slide 59 is slidably connected to the fixed tube 41. The ring array of the fixed ring 58 is installed with a self-resetting switch 510, and the inner ring array of the slide 59 is fixed with an electric telescopic rod 511. The output shaft of the electric telescopic rod 511 is fixedly connected to an extrusion block 512, and both sides of the extrusion block 512 are inclined. A magnetic block for power supply is installed on the fixed ring 58, and the power supply harness of the electromagnet 57 is set from the lifting tube 43, the small frame 51, and the main tube 52, and is connected to the battery.

[0049] By adopting the above technical solution, when it is necessary to retract the main pipe 52, the connecting frame 53 and the outlet pipe 54 into the interior of the lifting pipe 43, the electromagnet 57 is energized, so that the connecting frame 53 moves in the direction of the electromagnet 57 under the magnetic force of the electromagnet 57, and the output shaft of the hydraulic rod 12 is contracted, so that the lifting pipe 43 is lowered to the bottom position, and then the small ring frame 61 and the extrusion ring 62 move upward, so that the main pipe 52, the connecting frame 53 and the outlet pipe 54 rotate to retract toward the lifting pipe 43, and extend out through the output shaft of the hydraulic rod 12. At this time, the main pipe 52, the connecting frame 53, the outlet pipe 54 and other structures are retracted into the interior of the lifting pipe 43.

[0050] There may be protruding and uneven locations inside the cave. When there are protruding locations, the outlet pipe 54 may easily bump against the inner wall of the cave when rotating, thereby affecting the uniformity of the ejected slurry and causing impact on the cave, increasing the possibility of cave collapse.

[0051] The outer wall of the lifting tube 43 can be fixed with an infrared ranging device in a circular array. Before the slurry is sprayed, the output shafts of all the electric telescopic rods 511 are retracted. At this time, the contacts of the self-resetting switch 510 will not be squeezed and limited by the squeezing block 512. Therefore, when the slurry is sprayed, the outlet pipe 54 is close to the inner side of the cave due to centrifugal force. The lifting tube 43 rotates to measure the distance around the cave. When the protrusion is detected, the signal is transmitted to the external controller to control the depth of the output shaft of the corresponding electric telescopic rod 511, so as to control the corresponding squeezing block 512 to approach and squeeze the self-resetting switch 510. When one of the self-resetting switches 510 rotates to the squeezing block 512 at that location, the self-resetting switch 510 is squeezed and closed, thereby energizing the electromagnet 57 of the telescopic tube assembly 5 that is about to approach the protrusion, preventing the outlet pipe 54 at that location from colliding with the protrusion of the cave, thereby improving the uniformity of the sprayed slurry and avoiding impact on the cave, which may aggravate the possibility of cave collapse.

[0052] The self-resetting switch 510 closes or opens its contacts when pressed, and automatically returns to its initial state through a spring or elastic component after the external force is removed. This is a mature existing technology and will not be described in detail.

[0053] Embodiment 2: The technical solution of this embodiment is different from that of embodiment 1 in that: Figures 2 to 12 The segmented sealing device also includes an adjusting component 6 arranged inside the fixed tube 41. The adjusting component 6 includes a small ring frame 61 slidably connected to the bottom of the outer wall of the lifting tube 43. The top of the small ring frame 61 is fixedly connected to an extrusion ring 62. The inner top of the extrusion ring 62 is chamfered. The top of the extrusion ring 62 is fixedly connected to a small rod 63. The top of the small rod 63 passes through the turntable 42, and the top of the small rod 63 is threaded. A bolt 64 is threadedly connected to the thread at the top of the small rod 63, and the bottom of the bolt 64 is fixedly connected to a limiting tube 65.

[0054] By adopting the above technical solution, when it is necessary to put the main pipe 52, the connecting frame 53 and the outlet pipe 54 in a horizontal state, the bolt 64 is rotated by an external tool, so that the bolt 64 can move upward relative to the small rod 63, so that the small rod 63 moves downward with the extrusion ring 62. At this time, under the action of the gravity of the main pipe 52, the connecting frame 53 and the outlet pipe 54, the main pipe 52, the connecting frame 53 and the outlet pipe 54 are angularly offset. At this time, the top surface of the extrusion ring 62 just limits the main pipe 52, so that the main pipe 52, the connecting frame 53 and the outlet pipe 54 are in a horizontal state. When it is necessary to bring the main pipe 52, the connecting frame 53 and the outlet pipe 54 close to the lifting pipe 43, the bolt 64 is rotated in the opposite direction to the previous direction, so that the small rod 63 moves upward with the extrusion ring 62, and the extrusion ring 62 squeezes the main pipe 52, so that the main pipe 52, the connecting frame 53 and the outlet pipe 54 are close to the lifting pipe 43.

[0055] The top of the turntable 42 is slidably connected to the position of the limiting tube 65, and the bottom of the lifting plate 66 is fixedly connected to the tilting block 67. The turntable 42 is slidably connected to the position of the tilting block 67, and the extrusion frame 68 is slidably connected to the position of the tilting block 67. Small blocks 69 are fixed to the inner annular array of the fixed tube 41. Both sides of the small blocks 69 are inclined, and both sides of the extrusion frame 68 are rotatably connected to round balls 610 for reducing friction.

[0056] By adopting the above technical solution, as the turntable 42 rotates, the extrusion frame 68 can be rotated accordingly. When the extrusion frame 68 rotates close to the small block 69, under the limiting action of the small block 69, the extrusion frame 68 can be moved in the direction of the tilting block 67, so that the tilting block 67 moves upward with the lifting plate 66, thereby limiting the upward movement of the tube 65 with the bolt 64 and the small rod 63, so that the extrusion ring 62 moves slightly upward. When the extrusion frame 68 rotates away from the tilting block 67, under the action of the gravity of the main tube 52, the connecting frame 53 and the outlet tube 54, the extrusion ring 62 moves slightly downward, limiting the downward movement of the tube 65 with the bolt 64 and the small rod 63 to reset. In this way, the main tube 52, the connecting frame 53 and the outlet tube 54 swing slightly, thereby improving the spraying surface, thereby helping to improve the uniformity of the spraying.

[0057] The inner side of the small ring frame 61 is fixedly connected to a bent frame 7, which extends into the interior of the lifting tube 43 and is fixedly connected to a blocking ring 8. The inner wall of the lifting tube 43 is located below the blocking ring 8 and is fixedly connected to a blocking frame 9. The top of the blocking frame 9 is slidably connected to a blocking plate 10, and a U-shaped spring piece 17 is fixedly connected between the blocking plate 10 and the blocking frame 9.

[0058] By adopting the above technical solution, when the main pipe 52, the connecting frame 53 and the outlet pipe 54 are in a horizontal state, the small ring frame 61, the bent frame 7 and the blocking ring 8 are in a lower position. At this time, the bottom of the blocking ring 8 is blocked by the blocking plate 10, so that the slurry is discharged through the main pipe 52, the connecting frame 53 and the outlet pipe 54. When the main pipe 52, the connecting frame 53 and the outlet pipe 54 are close to the lifting pipe 43 to achieve blocking, the small ring frame 61 and the bent frame 7 move upward with the blocking ring 8, and the blocking ring 8 blocks the connection between the second flexible pipe 56 and the lifting pipe 43. At this time, the bottom of the blocking ring 8 is not blocked by the blocking plate 10, so that the slurry is discharged from the bottom of the lifting pipe 43.

[0059] When the main pipe 52, the connecting frame 53 and the outlet pipe 54 are in a horizontal state, the blocking ring 8 moves upward to squeeze the blocking plate 10. At this time, the blocking plate 10 and the blocking frame 9 slide relative to each other, and the U-shaped spring piece 17 is in a compressed state. The sliding design between the blocking plate 10 and the blocking frame 9 allows the blocking plate 10 to maintain the sealing of the inner side of the blocking ring 8 when the extrusion frame 68 squeezes the extrusion ring 62 to move up and down slightly.

[0060] It should be noted that the sprayed slurry is made of quick-drying concrete. When the slurry sprayed on the inner wall of the cave reaches a certain thickness, the internal structure of the cave is stable, and the slurry flows out from the inside of the lifting pipe 43 to quickly complete the plugging.

[0061] A method for segmented plugging of a karst cave cavity in a highway tunnel comprises the following steps:

[0062] S1, segmentation, the fixing member 3 is composed of a bent rod and an insertion rod, the bent rod is fixedly connected to the top of the sealing plate 2, and the insertion rod is threadedly connected to the bent rod. When the sealing plate 2 is installed, the sealing plate 2 is placed in the position where the cave needs to be segmented and blocked, and the insertion rod is rotated by an external tool. Under the action of the threaded connection, the insertion rod produces a linear motion, and the insertion rod can be inserted into the inner wall of the cave, thereby fixing the sealing plate 2;

[0063] S2, grouting, the output shaft of the hydraulic rod 12 is contracted, so that the long plate 11 moves downward with the rotary joint 44, so that the lifting pipe 43 moves downward with the telescopic pipe assembly 5, and then the main pipe 52 rotates with the connecting frame 53 and the outlet pipe 54, so that the main pipe 52, the connecting frame 53 and the outlet pipe 54 are in a horizontal state. At this time, the output shaft of the motor 13 rotates, which can rotate the gear 15 fixed to the output shaft of the motor 13. Under the action of the mutual meshing of the two gears 15, the gear 15 fixed on the mounting pipe 14 rotates with the mounting pipe 14. The rotating disk 42 rotates with the lifting pipe 43, thereby causing the lifting pipe 43 to rotate with the main pipe 52, the connecting frame 53 and the outlet pipe 54, and enters the interior of the rotary joint 44 and the lifting pipe 43 through the connecting pipe 16, and enters the interior of the main pipe 52 through the second flexible pipe 56, and enters the outlet pipe 54 through the first flexible pipe 55, and then is sprayed out from the end of the outlet pipe 54. While the slurry is being sprayed, the lifting pipe 43 rotates so that the slurry is sprayed from different angles, so as to improve the uniformity of the slurry spraying and make the sprayed slurry evenly adhere to the interior of the cave.

[0064] Working principle: When it is necessary to retract the main pipe 52, the connecting frame 53 and the outlet pipe 54 into the interior of the lifting pipe 43, the electromagnet 57 is energized, so that the connecting frame 53 moves in the direction of the electromagnet 57 under the magnetic force of the electromagnet 57, and the output shaft of the hydraulic rod 12 is contracted, so that the lifting pipe 43 drops to the bottom position, and then the small ring frame 61 and the extrusion ring 62 move upward to make the main pipe 52, the connecting frame 53 and the outlet pipe 54 rotate to retract toward the lifting pipe 43, and extend through the output shaft of the hydraulic rod 12. At this time, the main pipe 52, the connecting frame 53, the outlet pipe 54 and other structures are retracted into the interior of the lifting pipe 43. Before the slurry is sprayed, the output shafts of all the electric telescopic rods 511 are contracted. At this time, the contacts of the self-resetting switch 510 will not be squeezed by the extrusion block 512. The extrusion limiter is used so that when the slurry is sprayed, the outlet pipe 54 is close to the inner side of the cave due to the centrifugal force, and the distance around the cave is measured by rotating the lifting tube 43. When the protruding position is detected, the signal is transmitted to the external controller to control the output shaft depth of the corresponding electric telescopic rod 511, so as to control the corresponding extrusion block 512 to be close to the extrusion self-resetting switch 510. When one of the self-resetting switches 510 rotates to the extrusion block 512 at that location, the self-resetting switch 510 is squeezed and closed, thereby energizing the electromagnet 57 of the telescopic tube assembly 5 that is about to approach the protrusion, avoiding the outlet pipe 54 at that location from colliding with the protruding part of the cave, thereby improving the uniformity of the sprayed slurry, avoiding the impact on the cave, and aggravating the possibility of cave collapse.

[0065] By turning the bolt 64 with an external tool, the bolt 64 can be moved upward relative to the small rod 63, so that the small rod 63 moves downward with the extrusion ring 62. At this time, under the action of the gravity of the main pipe 52, the connecting frame 53 and the outlet pipe 54, the main pipe 52, the connecting frame 53 and the outlet pipe 54 are angularly offset. At this time, the top surface of the extrusion ring 62 just limits the main pipe 52, so that the main pipe 52, the connecting frame 53 and the outlet pipe 54 are in a horizontal state. When it is necessary to bring the main pipe 52, the connecting frame 53 and the outlet pipe 54 close to the lifting pipe 43, the bolt 64 is turned in the opposite direction to the previous direction, so that the small rod 63 moves upward with the extrusion ring 62, and the extrusion ring 62 squeezes the main pipe 52, achieving The main pipe 52, the connecting frame 53 and the outlet pipe 54 are close to the lifting pipe 43. When the main pipe 52, the connecting frame 53 and the outlet pipe 54 are in a horizontal state, the small ring frame 61, the bent frame 7 and the blocking ring 8 are in a lower position. At this time, the bottom of the blocking ring 8 is blocked by the blocking plate 10, so that the slurry is discharged through the main pipe 52, the connecting frame 53 and the outlet pipe 54. When the main pipe 52, the connecting frame 53 and the outlet pipe 54 are close to the lifting pipe 43 to achieve blocking, the small ring frame 61 and the bent frame 7 move upward with the blocking ring 8, and the blocking ring 8 blocks the connection between the second flexible pipe 56 and the lifting pipe 43. At this time, the bottom of the blocking ring 8 is not blocked by the blocking plate 10, so that the slurry is discharged from the bottom of the lifting pipe 43.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for segmented plugging of a karst cave in a highway tunnel, comprising a pouring assembly (1) and a sealing plate (2), wherein the sealing plate (2) is used to segment the karst cave to achieve segmented plugging, and a fixing member (3) for fixing the sealing plate (2) is provided on the top of the sealing plate (2), wherein the device is characterized in that: The segmented plugging device also includes: A uniform spray assembly (4) is arranged on the inner side and above the sealing plate (2). The uniform spray assembly (4) is used to uniformly spray the slurry for plugging onto the inner wall of the cave. The uniform spray assembly (4) includes a fixed pipe (41) fixed to the inner side of the sealing plate (2). A rotating disk (42) is arranged inside the fixed pipe (41). A lifting pipe (43) is arranged inside the rotating disk (42). A rotary joint (44) is installed on the top of the lifting pipe (43). A connecting pipe (16) is arranged between the rotary joint (44) and the perfusion assembly (1). The telescopic tube assembly (5) is arranged at the bottom of the ring side of the lifting tube (43). The telescopic tube assembly (5) is telescopic as a whole. When the slurry for blocking is sprayed, the ejection port is closer to the inner wall of the cave. The telescopic tube assembly (5) includes a small frame (51) fixedly connected to the outer wall of the lifting tube (43). The interior of the small frame (51) is rotatably connected to the main pipe (52). The outer wall of the main pipe (52) is slidably connected to the connecting frame (53). The connecting frame (53) is fixedly connected to the outlet pipe (54). A first flexible pipe (55) is inserted between the outlet pipe (54) and the main pipe (52). A second flexible pipe (56) is inserted between the main pipe (52) and the lifting tube (43).

2. A road tunnel cave cavity segmented plugging device according to claim 1, characterized in that: The telescopic tube assembly (5) further comprises: The electromagnet (57) is fixed to the outer wall of the main pipe (52), and the connecting frame (53) is made of iron material near the electromagnet (57); A fixed ring (58) is fixed to the outer wall of the lifting tube (43). The outer side of the fixed ring (58) is rotatably connected to a slide (59). The slide (59) is slidably connected to the fixed tube (41). A self-resetting switch (510) is installed in an annular array on the fixed ring (58). An electric telescopic rod (511) is fixed to the inner annular array of the slide (59). The output shaft of the electric telescopic rod (511) is fixedly connected to an extrusion block (512).

3. The device for segmented plugging of karst caves and cavities in highway tunnels according to claim 2, characterized in that: Both sides of the extrusion block (512) are inclined.

4. The device for segmented plugging of karst caves and cavities in highway tunnels according to claim 1, characterized in that: Long plates (11) are fixed to both the front and rear ends of the rotary joint (44), a hydraulic rod (12) is fixedly connected to the top of the rear end of the sealing plate (2), and an output shaft of the hydraulic rod (12) is fixedly connected to the long plate (11) at the rear end.

5. The device for segmented plugging of karst caves and cavities in highway tunnels according to claim 1, characterized in that: The segmented plugging device also includes: The adjusting assembly (6) is arranged inside the fixed tube (41). The adjusting assembly (6) comprises a small ring frame (61) slidably connected to the bottom of the outer wall of the lifting tube (43). The top of the small ring frame (61) is fixedly connected to an extrusion ring (62). The inner top of the extrusion ring (62) is provided with a chamfer. The top of the extrusion ring (62) is fixedly connected to a small rod (63). The top of the small rod (63) passes through the rotating disk (42). The top of the small rod (63) is provided with a thread. The thread at the top of the small rod (63) is threadedly connected to a bolt (64). The bottom of the bolt (64) is fixedly connected to a limiting tube (65).

6. The device for segmented plugging of karst caves and cavities in highway tunnels according to claim 5, characterized in that: The top of the turntable (42) is slidably connected to a lifting plate (66) at a position corresponding to the limiting tube (65), the bottom of the lifting plate (66) is fixedly connected to a tilting block (67), the position of the turntable (42) corresponding to the tilting block (67) is slidably connected to an extrusion frame (68), and a small block (69) is fixed to the inner ring array of the fixed tube (41).

7. The device for segmented plugging of karst caves and cavities in highway tunnels according to claim 6, characterized in that: Both sides of the small block (69) are tilted, and both sides of the extrusion frame (68) are rotatably connected with balls (610) for reducing friction.

8. The device for segmented plugging of karst caves and cavities in highway tunnels according to claim 5, characterized in that: The inner side of the small ring frame (61) is fixedly connected with a bent frame (7), the bent frame (7) extends into the interior of the lifting tube (43) and is fixedly connected with a blocking ring (8), the inner wall of the lifting tube (43) is located below the blocking ring (8) and is fixedly connected with a blocking frame (9), the top of the blocking frame (9) is slidably connected with a blocking plate (10), and a U-shaped spring piece (17) is fixedly connected between the blocking plate (10) and the blocking frame (9).

9. The device for segmented plugging of karst caves and cavities in highway tunnels according to claim 8, characterized in that: The inner side of the fixed tube (41) is fixedly connected to the motor (13), the top of the turntable (42) is fixedly connected to the mounting tube (14), the outer side of the mounting tube (14) and the output shaft of the motor (13) are fixedly connected to the gear (15), and the two gears (15) are meshed with each other.

10. A method for segmented plugging of karst caves and cavities in highway tunnels, characterized by: The method is applicable to the segmented plugging device for karst caves and karst cavities in highway tunnels according to any one of claims 1 to 9, and comprises the following steps: S1, segmentation, installing the sealing plate (2) in the cave through the fixing member (3) to achieve segmentation of the cave; S2, grouting, grouting the slurry into the interior of the cave through the grouting component (1).

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