Segmented grouting device for shield to pass through karst cave in karst area

Abstract

The invention relates to the technical field of shield construction, in particular to a segmental grouting device for a shield to pass through a karst cave in a karst area, which comprises a segmental grouting device component group, and the segmental grouting device component group comprises a horizontal cave body, a pipeline device assembly, a sealing control assembly, a locking sealing assembly and a guide assembly. The multiple karst caves are communicated through the horizontal cave body, segmented grouting from far to near is achieved, earth surface punching is not needed, the construction time is shortened, the punching cost of the deep karst caves is reduced, the device adapts to complex construction conditions under existing buildings, device assemblies can be repeatedly used, the influence of residues on shield tunneling is avoided, and the construction economical efficiency is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of shield construction, in particular to a segmented grouting device for a shield tunneling through a karst cave in a karst area. Background Art

[0002] Karst, also known as karst, refers to the erosion and accumulation of landforms and geological features such as grooves, cracks and cavities produced by the chemical and physical action of water in soluble rock strata such as carbonate limestone, dolomite and sulfate gypsum, as well as sinkholes and depressions produced on the ground due to the collapse of the roof of the cavity.

[0003] When the shield machine passes through the karst area, the caves on the route need to be filled with grouting to improve the stability of the base layer and prevent subsidence or collapse. The grouting-filled caves can provide a more solid operating foundation for the shield machine, thereby ensuring the safety and efficiency of the construction.

[0004] At present, the grouting method for caves in karst areas mainly adopts the vertical grouting method. This method is to vertically drill holes on the surface of the cave and inject slurry formed by inert materials into the cave under a certain pressure to achieve the purpose of cave filling. However, when the cave is located under an existing building, the construction space is limited and the vertical grouting method cannot be used. In addition, for deeper caves, the cost of drilling deep holes from the surface is too high, which increases the construction cost. Summary of the invention

[0005] In order to overcome the above technical problems, the purpose of the present invention is to provide a segmented grouting device for a shield tunneling through a karst cave in a karst area, so as to solve the problems of limited construction space and excessively high construction cost in the current vertical grouting method proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a shield tunneling device for segmented grouting of caves in a karst area, comprising a base, a first cave and a second cave, wherein a segmented grouting device component group is arranged outside the first cave and the second cave, and the segmented grouting device component group is used to grout and fill the first cave and the second cave, and the segmented grouting device component group comprises a horizontal cave body, a pipeline device assembly, a sealing control assembly, a locking sealing assembly and a guiding assembly, and the horizontal cave body connects the first cave and the second cave, and the pipeline device assembly, the sealing control assembly, the locking sealing assembly and the guiding assembly move in the horizontal cave body; the pipeline device assembly comprises an end pipe, one end of the end pipe is connected to a front end pipe, one end of the front end pipe is connected to a rear end pipe, and one end of the rear end pipe is connected to a flexible pipe; the sealing control assembly comprises a plug, and the sealing control assembly is used to seal the end pipe, and the sealing control assembly is used to seal the end pipe. The sealing control component includes a plugging piece, a moving rod is installed inside the plugging piece, a sleeve shell, a hydraulic oil pipe 1, a hydraulic oil pipe 2 and an electro-hydraulic servo valve are arranged on the outside of the moving rod, the side of the electro-hydraulic servo valve is connected to the main oil pipe and the wire harness, and the outside of the sleeve shell is provided with a sleeve cylinder and a protective sleeve; the locking sealing component includes a sealing plugging sleeve, a polygonal sleeve is arranged on the side of the sealing plugging sleeve, one end of the polygonal sleeve is connected to a guide sleeve, a hydraulic rod is arranged on the outside of the guide sleeve, the working end of the hydraulic rod is connected to a moving ring, the side of the moving ring is connected to a cross bar, the side of the cross bar is provided with a guide seat 1, the side of the guide seat 1 is provided with a connecting rod 1, a roller 1, a connecting rod 2, a guide seat 2, a bracket, a convex column, a curved rod and a limiting tooth plate; the outside of the pipeline device component is provided with a guide assembly, and the guide assembly includes a rear ring shell and a roller 2.

[0007] Preferably: one end of the terminal pipe is provided with an opening, the other end of the terminal pipe is provided with a slurry outlet, the front end pipe is connected between the terminal pipe and the rear end pipe, the rear end pipe is connected between the front end pipe and the flexible pipe, the terminal pipe, the front end pipe, the rear end pipe and the flexible pipe are internally connected, the end of the flexible pipe away from the rear end pipe is connected to a grouting machine, and a pressure detector is installed on the terminal pipe.

[0008] Preferably: the plug is in contact with the end pipe outlet through a groove, the moving rod slides inside the sleeve shell, one end of the hydraulic oil pipe 1 is connected to the front position of the sleeve shell, the other end of the hydraulic oil pipe 1 is connected to the electro-hydraulic servo valve, and one end of the hydraulic oil pipe 2 is connected to the rear position of the sleeve shell.

[0009] Preferably: the other end of the hydraulic oil pipe 2 is connected to the electro-hydraulic servo valve, the electro-hydraulic servo valve is connected to the outer wall of the sleeve shell, one end of the main oil pipe is connected to the hydraulic pump, the wiring harness is electrically connected to the electro-hydraulic servo valve, the protective tube sleeve is sleeved on the outside of the main oil pipe and the wiring harness, the position of the sleeve cylinder corresponding to the moving rod is provided with a mechanical seal, the sleeve cylinder is in contact with the moving rod through the mechanical seal, and the sleeve cylinder is installed inside the front end tube through a support rod.

[0010] Preferably: the sealing sleeve is made of elastic material, a liquid pipe is connected to the side of the sealing sleeve, and the other end of the liquid pipe is connected to an injection pump, the sealing sleeve is installed on the outside of the front end tube, the polygonal sleeve and the guide sleeve are both sleeved on the front end tube, the hydraulic rod is connected to the front end tube through a support ring, two hydraulic rods are provided, and the two hydraulic rods are provided on the upper and lower sides of the front end tube, the hydraulic rod is connected to the guide sleeve through a through hole, and the moving ring is in sliding contact with the guide sleeve through a slide groove.

[0011] Preferably: one end of the cross bar is connected to the moving ring, the other end of the cross bar is connected to the rotating shaft of connecting rod one, the rotating shaft on connecting rod one slides in guide seat one through a slide groove, guide seat one and guide seat two are connected to the polygonal sleeve, the end of connecting rod one away from the rotating shaft is rotatably connected to roller one through a through hole, one end of connecting rod two is rotatably connected to roller one, the side surface of connecting rod two is in contact with connecting rod one, and the other end of connecting rod two is rotatably connected to guide seat two.

[0012] Preferably: one end of the curved rod is rotatably connected to guide seat 2, the other end of the curved rod is connected to a limiting tooth plate, the support frame is connected to the side of connecting rod 2, the support frame contacts the side of the sealing sleeve, the roller 1 contacts the side of the sealing sleeve, the limiting tooth plate is used to contact the horizontal hole body, the boss is connected to connecting rod 1, and the boss slides in the curved rod through a slide groove.

[0013] Preferably: the rear ring shell is fixedly connected to the rear end tube through a through hole, the second roller is installed on the rear ring shell through a bracket, and the second roller is used to contact the inner wall of the horizontal hole.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. Compared with the current vertical grouting method for grouting caves, this device is designed to connect multiple caves that need grouting through a horizontal cave body, and then insert the grouting device into the horizontal cave body. The grouting device can be used to grout multiple caves from far to near in sections, without drilling holes in each cave on the surface, which greatly shortens the construction time. At the same time, when facing multiple deeper caves, there is no need for high-cost repeated drilling, which can reduce construction costs;

[0016] 2. In the caves under existing buildings, grouting after horizontal drilling will not be restricted by the existing buildings and can adapt to a variety of different construction conditions;

[0017] 3. In the designed device, the pipeline device components, sealing control components, locking sealing components and guide components can be used repeatedly, and no device residue will be produced after grouting. Therefore, when the shield machine excavates the cave after grouting, there will be no residual devices to affect it. The design that can be used repeatedly can significantly improve the economy of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the substrate, the first cave and the second cave of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the grouting cave of the present invention at one time;

[0020] Figure 3 It is a structural schematic diagram of the second stage of grouting cave of the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the pipeline device assembly, the sealing control assembly, the locking sealing assembly and the guiding assembly of the present invention;

[0022] Figure 5 It is a side structural schematic diagram of the pipeline device assembly, the sealing control assembly, the locking sealing assembly and the guiding assembly of the present invention;

[0023] Figure 6 It is a cross-sectional structural schematic diagram of the pipeline device assembly, the sealing control assembly, the locking sealing assembly and the guiding assembly of the present invention;

[0024] Figure 7 It is a cross-sectional structural schematic diagram of the sealing control component part of the present invention;

[0025] Figure 8 It is a schematic structural diagram of the pipeline device assembly and the locking seal assembly of the present invention;

[0026] Fig. 9 It is a structural schematic diagram of the locking and sealing assembly part of the present invention;

[0027] Fig.10 It is a schematic diagram of the overall structure of the locking and sealing assembly of the present invention when it is retracted;

[0028] Fig.11 It is a structural schematic diagram of the locking and sealing component part of the present invention when the locking and sealing component is retracted;

[0029] Fig.12 It is a schematic diagram of the overall cross-sectional structure of the locking and sealing assembly of the present invention when it is retracted;

[0030] Fig.13 It is a structural schematic diagram of the locking and sealing assembly part of the present invention;

[0031] Fig.14 It is a schematic diagram of the overall two-dimensional structure of the locking and sealing assembly of the present invention when it is retracted from the side.

[0032] In the figure: 101, base; 102, cave 1; 103, cave 2; 02, segmented grouting device component group; 21, horizontal cave; 22, pipeline device assembly; 221, end pipe; 222, front end pipe; 223, rear end pipe; 224, flexible pipe; 23, sealing control assembly; 231, plug; 232, moving rod; 233, sleeve shell; 234, hydraulic oil pipe 1; 235, hydraulic oil pipe 2; 236, electro-hydraulic servo valve; 237, main oil pipe; 238, wire harness; 239, sleeve shell body; 2310, protective sleeve; 24, locking seal assembly; 241, sealing plug sleeve; 242, polygonal sleeve; 243, guide sleeve; 244, hydraulic rod; 245, moving circle; 246, cross bar; 247, guide seat one; 248, connecting rod one; 249, roller one; 2410, connecting rod two; 2411, guide seat two; 2412, support frame; 2413, boss; 2414, curved rod; 2415, limit tooth plate; 25, guide assembly; 251, rear ring shell; 252, roller two. DETAILED DESCRIPTION

[0033] See also Figure 1-14The present invention provides an embodiment: a shield tunneling device for traversing a karst cave segmented grouting, comprising a base 101, a karst cave 102 and a karst cave 2 103, wherein the karst cave 102 and the karst cave 2 103 are provided with a segmented grouting device component group 02 outside, and the segmented grouting device component group 02 is used for grouting and filling the karst cave 102 and the karst cave 2 103, and the segmented grouting device component group 02 comprises a horizontal cave body 21, a pipeline device component 22, a sealing control component 23, a locking sealing component 24 and a guiding component 25, and the horizontal cave body 21 is connected to the karst cave 102 and the karst cave 2 103. Hole 2 103, the pipeline device assembly 22, the sealing control assembly 23, the locking sealing assembly 24 and the guide assembly 25 move in the horizontal hole body 21; the pipeline device assembly 22 includes an end pipe 221, one end of the end pipe 221 is connected to a front end pipe 222, one end of the front end pipe 222 is connected to a rear end pipe 223, and one end of the rear end pipe 223 is connected to a flexible pipe 224; the sealing control assembly 23 includes a plug 231, and the sealing control assembly 23 is used to plug the end pipe 221. The sealing control assembly 23 includes a plug 231, and the plug 231 is A moving rod 232 is installed inside, and a sleeve shell 233, a hydraulic oil pipe 1 234, a hydraulic oil pipe 235 and an electro-hydraulic servo valve 236 are arranged outside the moving rod 232. The side of the electro-hydraulic servo valve 236 is connected to a main oil pipe 237 and a wiring harness 238. The sleeve shell 233 is provided with a sleeve shell cylinder 239 and a protective sleeve 2310 outside. The locking seal assembly 24 includes a sealing plug sleeve 241, and a polygonal sleeve shell 242 is provided on the side of the sealing plug sleeve 241. One end of the polygonal sleeve shell 242 is connected to a guide sleeve shell 243. The guide sleeve shell 243 is provided with a guide sleeve shell 243 outside. A hydraulic rod 244 is arranged, the working end of the hydraulic rod 244 is connected to a moving circle 245, the side of the moving circle 245 is connected to a cross bar 246, the side of the cross bar 246 is provided with a guide seat 247, the side of the guide seat 247 is provided with a connecting rod 1 248, a roller 1 249, a connecting rod 2410, a guide seat 2411, a support frame 2412, a boss 2413, a curved rod 2414 and a limiting tooth plate 2415; a guiding assembly 25 is arranged on the outside of the pipeline device assembly 22, and the guiding assembly 25 includes a rear ring shell 251 and a roller 252.

[0034] One end of the end pipe 221 is provided with an opening, and the other end of the end pipe 221 is provided with a slurry outlet, the front end pipe 222 is connected between the end pipe 221 and the rear end pipe 223, and the rear end pipe 223 is connected between the front end pipe 222 and the flexible pipe 224. The end pipe 221, the front end pipe 222, the rear end pipe 223 and the flexible pipe 224 are internally connected, and the end of the flexible pipe 224 away from the rear end pipe 223 is connected to the grouting machine, and a pressure detector is installed on the end pipe 221.

[0035] The plug 231 contacts the slurry outlet of the end tube 221 through the groove, the moving rod 232 slides inside the sleeve shell 233, one end of the hydraulic oil pipe 234 is connected to the front position of the sleeve shell 233, the other end of the hydraulic oil pipe 234 is connected to the electro-hydraulic servo valve 236, and one end of the hydraulic oil pipe 235 is connected to the rear position of the sleeve shell 233.

[0036] The other end of the hydraulic oil pipe 235 is connected to the electro-hydraulic servo valve 236, the electro-hydraulic servo valve 236 is connected to the outer wall of the sleeve shell 233, one end of the main oil pipe 237 is connected to the hydraulic pump, the wiring harness 238 is electrically connected to the electro-hydraulic servo valve 236, the protective pipe sleeve 2310 is sleeved on the outside of the main oil pipe 237 and the wiring harness 238, the sleeve cylinder 239 is provided with a mechanical seal at the position corresponding to the moving rod 232, the sleeve cylinder 239 is in contact with the moving rod 232 through the mechanical seal, and the sleeve cylinder 239 is installed inside the front end tube 222 through a support rod.

[0037] The sealing sleeve 241 is made of elastic material, a liquid pipe is connected to the side of the sealing sleeve 241, and the other end of the liquid pipe is connected to an injection pump, the sealing sleeve 241 is installed on the outside of the front end tube 222, the polygonal sleeve 242 and the guide sleeve 243 are both sleeved on the front end tube 222, the hydraulic rod 244 is connected to the front end tube 222 through a support ring, two hydraulic rods 244 are provided, and the two hydraulic rods 244 are provided on the upper and lower sides of the front end tube 222, the hydraulic rod 244 is connected to the guide sleeve 243 through a through hole, and the moving ring 245 is in sliding contact with the guide sleeve 243 through a slide groove.

[0038] One end of the cross bar 246 is connected to the moving circle 245, and the other end of the cross bar 246 is connected to the rotating shaft of the connecting rod 248. The rotating shaft on the connecting rod 248 slides in the guide seat 247 through a sliding groove. The guide seat 1 247 and the guide seat 2 2411 are connected to the polygonal shell 242. The end of the connecting rod 1 248 away from the rotating shaft is rotatably connected to the roller 1 249 through a through hole. One end of the connecting rod 2 2410 is rotatably connected to the roller 1 249. The side of the connecting rod 2410 is in contact with the connecting rod 1 248. The other end of the connecting rod 2 2410 is rotatably connected to the guide seat 2 2411.

[0039] One end of the curved rod 2414 is rotatably connected to the guide seat 2411, and the other end of the curved rod 2414 is connected to the limiting tooth plate 2415. The support frame 2412 is connected to the side of the connecting rod 2410, the support frame 2412 contacts the side of the sealing sleeve 241, the roller 1 249 contacts the side of the sealing sleeve 241, the limiting tooth plate 2415 is used to contact the horizontal hole body 21, the boss 2413 is connected to the connecting rod 1 248, and the boss 2413 slides in the curved rod 2414 through the slide groove.

[0040] The rear ring shell 251 is fixedly connected to the rear end tube 223 through a through hole, and the second roller 252 is installed on the rear ring shell 251 through a bracket. The second roller 252 is used to contact the inner wall of the horizontal hole body 21.

[0041] Working principle: before the shield machine passes through the karst area, the detection equipment is first used to detect the location of the karst caves on the shield machine excavation route, and the location of the karst caves on the route is located and accurately measured to determine the karst caves that need to be filled. In this patent, karst cave 102 and karst cave 2 103 are used as examples to represent multiple karst caves that need to be filled. Then, a horizontal directional drill is used to drill a hole in the matrix 101 to drill a horizontal cave body 21, so that the horizontal cave body 21 connects karst cave 102 and karst cave 2 103. At this time, the preliminary preparation is completed;

[0042] The pipeline device assembly 22, the sealing control assembly 23, the locking sealing assembly 24 and the guiding assembly 25 in the segmented grouting device component set 02 are placed in the horizontal hole 21, and are moved along the horizontal hole 21. At this time, the pipeline device assembly 22, the sealing control assembly 23, the locking sealing assembly 24 and the guiding assembly 25 are Fig.10 The structural state of the trivial matter, the device mainly relies on the depth of the flexible pipe 224 inserted into the horizontal cave 21 to move it, and a plurality of guide components 25 are provided, and the spacing between the plurality of guide components 25 is ten meters. The guide component 25 is used to be installed on the rear end pipe 223 and the flexible pipe 224 to avoid direct friction with the wall of the horizontal cave 21 when the device moves in the horizontal cave 21, and the height of the roller 1 249 in the retracted locking seal component 24 is the same as the height of the roller 2 252 in the guide component 25, and the retracted roller 1 249 also plays a role in contacting the wall of the horizontal cave 21, and the control device moves to the farthest cave 102 position as shown in Figure 2 Position shown;

[0043] Then, the liquid injection pump at one end of the liquid pipe of the sealing plug sleeve 241 is controlled to be turned on, and the liquid injection pump is allowed to inject liquid into the sealing plug sleeve 241 through the liquid pipe. The sealing plug sleeve 241 will swell and fill the sealing horizontal hole 21. In order to ensure the sealing stability of the sealing plug sleeve 241, it is also necessary to start the hydraulic rod 244 in the locking seal component 24. The hydraulic rod 244 will extend when it is started, and then push the moving ring 245 to slide on the guide sleeve shell 243 through the working end, thereby driving the cross rod 246 to move, so that the structural state of the locking seal component 24 changes from Fig.10 Transformed into Figure 5In the structural state shown, at this time, the roller 249 will contact the sealing plugging sleeve 241, and the support frame 2412 will also contact the side of the sealing plugging sleeve 241. The roller 249 and the support frame 2412 are used to provide stable support for the sealing plugging sleeve 241, and the driven curved rod 2414 and the limiting tooth plate 2415, the limiting tooth plate 2415 will contact the wall of the horizontal hole body 21. When the grouting generates a huge pressure to squeeze the entire device, in order to prevent the entire device from being pushed and displaced by the pressure, the limiting tooth plate 2415 will be inserted into the base 101 due to the arc-shaped structural characteristics under the action of the push, thereby providing support force to prevent the entire device from being displaced under pressure, locking the sealing assembly 24 After the device supports the sealing plugging sleeve 241, by starting the grouting machine connected to the flexible pipe 224, the slurry will flow into the cave 102 through the flexible pipe 224, the rear end pipe 223, the front end pipe 222 and the slurry outlet of the end pipe 221. The pressure detector on the end pipe 221 can observe the slurry injection situation of the cave 102. When the pressure reaches the standard, it means that the cave 102 is full of slurry. At this time, the electro-hydraulic servo valve 236 in the control sealing control component 23 is controlled to connect the main oil pipe 237 and the hydraulic oil pipe 235. The hydraulic oil is injected into the sleeve shell 233 through the hydraulic pump, and the moving rod 232 moves to the left under the pressure of the hydraulic oil. Figure 7 As shown in the direction, the plug 231 is driven to block the slurry outlet of the end tube 221, and then the slurry solidifies, the liquid in the sealing plug sleeve 241 is controlled to be pumped out, and the moving ring 245 moves to allow the structure in the locking sealing component 24 to return to its original position and shrink, so that it moves to the position of the second cave 103 as shown in the figure. Figure 3 As shown, the work of locking the sealing assembly 24 to seal the horizontal cave 21 is repeated, and grouting is performed on the cave 2 103 to complete the sealing of the cave. After grouting of multiple caves 1 102 and cave 2 103 is completed, the device is pulled out from the horizontal cave 21, and the segmented grouting filling work of the caves in the karst area is completed, providing a solid working foundation for the subsequent shield machine work.

Claims

1. A shield tunneling device for grouting a karst cave in a karst area, comprising a base, a first karst cave and a second karst cave, characterized in that: A segmented grouting device component group is arranged outside the first and second karst caves, and the segmented grouting device component group is used to grout the first and second karst caves, and the segmented grouting device component group includes a horizontal cave body, a pipeline device component, a sealing control component, a locking sealing component and a guiding component, and the horizontal cave body is connected with the first and second karst caves, and the pipeline device component, the sealing control component, the locking sealing component and the guiding component move in the horizontal cave body; The pipeline device assembly includes an end pipe, one end of the end pipe is connected to a front end pipe, one end of the front end pipe is connected to a rear end pipe, and one end of the rear end pipe is connected to a flexible pipe; The sealing control assembly includes a plugging piece, which is used to seal the end pipe. The sealing control assembly includes a plugging piece, a moving rod is installed inside the plugging piece, a sleeve shell, a hydraulic oil pipe 1, a hydraulic oil pipe 2 and an electro-hydraulic servo valve are arranged outside the moving rod, a main oil pipe and an electric wire harness are connected to the side of the electro-hydraulic servo valve, and a sleeve shell cylinder and a protective pipe sleeve are arranged outside the sleeve shell; The locking seal assembly comprises a sealing plug sleeve, a polygonal sleeve shell is arranged on the side of the sealing plug sleeve, one end of the polygonal sleeve shell is connected to a guide sleeve shell, a hydraulic rod is arranged outside the guide sleeve shell, a moving ring is connected to the working end of the hydraulic rod, a cross bar is connected to the side of the moving ring, a guide seat 1 is arranged on the side of the cross bar, and a connecting rod 1, a roller 1, a connecting rod 2, a guide seat 2, a support frame, a convex column, a curved rod and a limit tooth plate are arranged on the side of the guide seat 1; A guide assembly is arranged outside the pipeline device assembly, and the guide assembly includes a rear ring shell and a second roller.

2. The segmented grouting device for shield tunneling through a karst cave in a karst area according to claim 1 is characterized by: One end of the terminal pipe is provided with an opening, and the other end of the terminal pipe is provided with a slurry outlet, the front end pipe is connected between the terminal pipe and the rear end pipe, and the rear end pipe is connected between the front end pipe and the flexible pipe, the terminal pipe, the front end pipe, the rear end pipe and the flexible pipe are internally connected, the end of the flexible pipe away from the rear end pipe is connected to a grouting machine, and a pressure detector is installed on the terminal pipe.

3. The segmented grouting device for shield tunneling through a karst cave in a karst area according to claim 1 is characterized by: The plug is in contact with the end pipe outlet through a groove, the moving rod slides inside the sleeve shell, one end of the hydraulic oil pipe 1 is connected to the front position of the sleeve shell, the other end of the hydraulic oil pipe 1 is connected to the electro-hydraulic servo valve, and one end of the hydraulic oil pipe 2 is connected to the rear position of the sleeve shell.

4. The segmented grouting device for shield tunneling through a karst cave in a karst area according to claim 1 is characterized by: The other end of the hydraulic oil pipe 2 is connected to the electro-hydraulic servo valve, the electro-hydraulic servo valve is connected to the outer wall of the sleeve shell, one end of the main oil pipe is connected to the hydraulic pump, the wiring harness is electrically connected to the electro-hydraulic servo valve, the protective tube sleeve is sleeved on the outside of the main oil pipe and the wiring harness, the position of the sleeve cylinder corresponding to the moving rod is provided with a mechanical seal, the sleeve cylinder is in contact with the moving rod through the mechanical seal, and the sleeve cylinder is installed inside the front end tube through a support rod.

5. The segmented grouting device for shield tunneling through a karst cave in a karst area according to claim 1 is characterized by: The sealing sleeve is made of elastic material, a liquid pipe is connected to the side of the sealing sleeve, and the other end of the liquid pipe is connected to an injection pump, the sealing sleeve is installed on the outside of the front end tube, the polygonal sleeve and the guide sleeve are both sleeved on the front end tube, the hydraulic rod is connected to the front end tube through a support ring, two hydraulic rods are provided, and the two hydraulic rods are arranged on the upper and lower sides of the front end tube, the hydraulic rod is connected to the guide sleeve through a through hole, and the moving ring is in sliding contact with the guide sleeve through a slide groove.

6. The segmented grouting device for shield tunneling through a karst cave in a karst area according to claim 1 is characterized by: One end of the cross bar is connected to the moving circle, and the other end of the cross bar is connected to the rotating shaft of the connecting rod one. The rotating shaft on the connecting rod one slides in the guide seat one through a sliding groove. The guide seat one and the guide seat two are connected to the polygonal sleeve. The end of the connecting rod one away from the rotating shaft is rotatably connected to the roller one through a through hole. One end of the connecting rod two is rotatably connected to the roller one. The side surface of the connecting rod two is in contact with the connecting rod one, and the other end of the connecting rod two is rotatably connected to the guide seat two.

7. The segmented grouting device for shield tunneling through a karst cave in a karst area according to claim 1 is characterized by: One end of the curved rod is rotatably connected to guide seat 2, and the other end of the curved rod is connected to a limiting tooth plate. The support frame is connected to the side of connecting rod 2, the support frame contacts the side of the sealing sleeve, the roller 1 contacts the side of the sealing sleeve, the limiting tooth plate is used to contact the horizontal hole body, the boss is connected to connecting rod 1, and the boss slides in the curved rod through a slide groove.

8. The segmented grouting device for shield tunneling through a karst cave in a karst area according to claim 1 is characterized by: The rear ring shell is fixedly connected to the rear end tube through a through hole, and the second roller is installed on the rear ring shell through a bracket, and the second roller is used to contact the inner wall of the horizontal hole body.

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