A cave grouting and hole sealing device in karst area

Abstract

The application relates to a karst region cave grouting hole sealing device, and belongs to the field of karst region construction. The grouting hole sealing device comprises a hole sealing bag, a grouting pipe and a supporting mechanism. The hole sealing bag is sleeved outside the grouting pipe and is fixedly connected with the end of the grouting pipe at one end and the outer wall of the grouting pipe at the other end. A plurality of grout outlets are formed in the outer wall of the grouting pipe. The supporting mechanism comprises a plurality of supporting rods. The plurality of supporting rods are divided into groups. Each group comprises at least two supporting rods. The groups of supporting rods are sequentially arranged along the axial direction of the grouting pipe. The supporting rods are rotationally connected with the grouting pipe. A driving assembly for driving the supporting rods to rotate is arranged on the grouting pipe. The grouting hole sealing device realizes the plugging of the hole, so that the grouting reinforcement construction in the karst region is not prone to the phenomena of grout leakage and grout leakage, thereby reducing the waste of grout and the construction cost.

Description

Technical Field

[0001] This application relates to the field of construction in karst areas, and in particular to a grouting and sealing device for karst caves. Background Technology

[0002] Guangxi province in my country is largely a typical karst development area in southwestern China, and therefore its main landform is karst. Karst landforms are a general term for surface and underground features formed by the dissolution of soluble rocks by surface and groundwater. Roadbed defects are frequent and varied in form in karst areas, mainly manifested as: ① Insufficient roadbed bearing capacity; ② Roadbed collapse: When there are underlying soil cavities or karst caves within the roadbed area, due to factors such as natural conditions, cutting, groundwater drainage, or roadbed load, these cavities and caves collapse, causing pavement subsidence, cracking, and even sudden roadbed subsidence; ③ Uneven roadbed settlement: Due to the presence of surface karst features (including open karst caves, fissures, solution channels, solution grooves, and stalagmites and karst formations), the bedrock surface beneath the roadbed experiences significant undulations. Furthermore, the differences in the soil mechanical properties of the overlying soil layers lead to uneven roadbed settlement.

[0003] Currently, the main technologies for treating karst caves under roadbeds include grouting reinforcement, filling, and cover plate crossing. Among these, grouting reinforcement is generally used for karst caves that are buried deep.

[0004] However, due to the abundance and interconnection of caves in karst areas, grout leakage and cross-contamination are common during grouting reinforcement, leading to significant grout waste and increased construction costs. Summary of the Invention

[0005] In order to prevent grout leakage and cross-contamination during grouting reinforcement construction in karst areas, thereby reducing grout waste and lowering construction costs, this application provides a grouting and sealing device for karst caves.

[0006] This application provides a grouting and sealing device for karst caves in karst areas, which relates to the following technical solution:

[0007] A grouting and sealing device for karst caves includes a sealing bag, a grouting pipe, and a support mechanism. The sealing bag is fitted over the outside of the grouting pipe, with one end fixedly connected to the end of the grouting pipe and the other end fixedly connected to the outer wall of the grouting pipe. Multiple grout outlet holes are provided on the outer wall of the grouting pipe. The support mechanism includes multiple support rods, which are divided into multiple groups. Each group has at least two support rods. The multiple groups of support rods are arranged sequentially along the axial direction of the grouting pipe, and each support rod is rotatably connected to the grouting pipe. A drive assembly for driving the support rods to rotate is provided on the grouting pipe.

[0008] By adopting the above technical solution, workers lower the sealing bag into the duct, and then inject concrete grout into the sealing bag through the grouting pipe. As the concrete grout is injected, the sealing bag gradually inflates until it blocks the duct, thus completing the grouting process. Once the grout solidifies, the duct is sealed. This reduces the likelihood of grout leakage or cross-contamination during grouting reinforcement construction in karst areas, thereby reducing grout waste and lowering construction costs. The support rod design allows workers to control the drive assembly to rotate the support rod, pre-inflating the sealing bag. This prevents gaps between the sealing bag and the duct sidewall due to the bag's own weight or the weight of the grout, further reducing grout leakage and cross-contamination during grouting reinforcement construction in karst areas, thus further reducing grout waste and lowering construction costs.

[0009] Optionally, the support rods are provided in two sets, which are divided into a first support rod and a second support rod. The grouting pipe includes a grouting sub-pipe and a grouting sleeve. The grouting sleeve is slidably sleeved on the outside of the grouting sub-pipe. One end of the sealing bag is fixedly connected to the end face of the grouting sub-pipe, and the other end is sleeved on the outside of the grouting sleeve and fixedly connected to the outer wall of the grouting sleeve. The driving assembly includes a first driving block, a second driving block, and a transmission hydraulic assembly connected to the grouting sub-pipe. The first support rods all pass through the grouting sleeve and are rotatably connected to the first driving block. The second support rods are all rotatably connected to the wall of the grouting sleeve, and the end of the second support rod away from the sealing bag passes into the grouting sleeve. The second driving block is connected to the second support rod through the transmission hydraulic assembly to drive the second support rod to rotate.

[0010] By adopting the above technical solution, the workers pull the grouting sub-pipe to make the grouting sub-pipe and the grouting sleeve relative to each other, so that the first support rod rotates under the action of the first drive block, and the second support rod rotates under the action of the second drive block and the transmission hydraulic group, thereby realizing the support of the sealing bag.

[0011] Optionally, both the first drive block and the second drive block are slidably connected to the grouting sub-pipe, and both the first drive block and the second drive block are provided with locking components for locking their sliding distance from the grouting sub-pipe.

[0012] By adopting the above technical solution, the sliding connection between the first driving block, the second driving block and the grouting sub-pipe makes it difficult for the first or second support rod to continue rotating under the action of the grouting sub-pipe after the sealing bag at the position of the first support rod or the second support rod comes into contact with the side wall of the duct.

[0013] Optionally, the locking assembly includes a locking block and a locking spring. The first driving block and the second driving block are each provided with a plurality of sliding grooves. Each sliding groove corresponds to a set of locking assemblies. The locking spring is located in the corresponding sliding groove, and one end of the locking spring is fixedly connected to the bottom of the sliding groove, and the other end is fixedly connected to the locking block. The grouting sub-pipe is provided with a locking groove for engaging with the locking block. Along the axial direction of the grouting sub-pipe, both ends of the locking block are set as inclined surfaces.

[0014] By adopting the above technical solution, the locking block engages with the locking groove under the elastic force of the locking spring. When the support rod rotates until the sealing bag abuts against the side wall of the duct, and when the grouting sub-pipe continues to slide with the grouting sleeve, the locking block disengages from the locking groove, thus making it difficult for the support rod to continue rotating.

[0015] Optionally, both sets of support rods are provided with elastic plates at their ends, and the first support rod and the second support rod are slidably connected to the corresponding elastic plates.

[0016] By adopting the above technical solution, the elastic plate makes it less likely for wrinkles to form on the sealed bag when the first support rod and the second support rod support the sealed bag.

[0017] Optionally, the side of the elastic plate near the sealing bag is configured as an arc surface.

[0018] By adopting the above technical solution, the side of the elastic plate is set as an arc surface, making it less likely for the elastic plate to tear the sealing bag.

[0019] Optionally, both the first and second support rods are rotatably connected to sliders, and the elastic plate is provided with a groove along its length, with the slider slidingly connected to the groove.

[0020] By adopting the above technical solution, the slider and the groove are designed to achieve sliding hinge connection between the two sets of support rods, the second support rod and the corresponding elastic plate, so that the angle of the elastic plate does not easily change during the rotation of the support rod.

[0021] Optionally, the two elastic plates are connected by a tie rod.

[0022] By adopting the above technical solution, the setting of the traction rod facilitates the storage of the elastic plate, thereby making it less likely for the elastic plate to affect the retraction of the first support rod and the second support rod.

[0023] Optionally, both ends of the pull rod are rotatably connected to the elastic plate on the corresponding side, and the pull rod is a telescopic rod.

[0024] By adopting the above technical solution, the tie rod is set as a telescopic rod, which makes it less likely for the tie rod to affect the support rod's support.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The workers lower the sealing bag into the duct, and then inject concrete grout into the sealing bag through the grouting pipe. As the concrete grout is injected, the sealing bag gradually inflates until it blocks the duct, thus completing the grouting. Once the grout has solidified, the duct is sealed. This makes it less likely for grout to cross-flow or leak during grouting reinforcement construction in karst areas, thereby reducing grout waste and lowering construction costs.

[0027] 2. The elastic plate design makes it less likely for wrinkles to form on the sealing bag when the first and second support rods support it. Attached Figure Description

[0028] Figure 1 This is a partial cross-sectional view of the sealed bag according to an embodiment of this application;

[0029] Figure 2 This is a partial cross-sectional view of the grouting sleeve in an embodiment of this application;

[0030] Figure 3 This is a cross-sectional view of the first driving block in an embodiment of this application, to show the locking component;

[0031] Figure 4 This is a partial sectional view of the tie rod in this embodiment;

[0032] Figure 5 This is a partial cross-sectional view of the transmission hydraulic assembly in this embodiment.

[0033] Explanation of reference numerals in the attached drawings: 100, sealing bag; 200, grouting pipe; 210, grouting sub-pipe; 211, grout outlet; 212, locking groove; 213, sliding groove; 220, grouting sleeve; 300, support rod; 310, first support rod; 311, first slider; 320, second support rod; 321, second slider; 400, traction rod; 410, traction sub-rod; 420, traction sleeve; 500, drive assembly; 510, first drive block; 511, sliding block; 520, second drive block; 521, sliding groove; 530, transmission hydraulic assembly; 531, transmission hydraulic box; 532, first transmission hydraulic plug; 533, second transmission hydraulic plug; 600, locking assembly; 610, locking block; 620, locking spring; 700, elastic plate; 710, first sliding groove; 720, second sliding groove. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0035] This application discloses a grouting and sealing device for karst caves in karst areas.

[0036] Reference Figure 1 The grouting sealing device includes a sealing bag 100 for sealing the duct, a grouting pipe 200 for injecting concrete grout into the sealing bag 100, and a support mechanism located inside the sealing bag 100 to support it. The grouting pipe 200 has multiple grout outlet holes 211. The operator first connects one end of the grouting pipe 200 to the outlet end of the grouting pump, and the inlet end of the grouting pump to a cylinder containing concrete grout. Then, the sealing bag 100 is lowered into the duct. The support mechanism then supports the sealing bag 100 so that it contacts the sidewall of the duct. Finally, grout is injected into the sealing bag 100, causing it to bulge under the action of the grout. Once the concrete grout solidifies, the duct is sealed.

[0037] The grouting pipe 200 includes a grouting sub-pipe 210 and a grouting sleeve 220. The grouting sleeve 220 is slidably sleeved on the outside of the grouting sub-pipe 210, and the grout outlet 211 is located on the grouting sub-pipe 210.

[0038] The sealing bag 100 is fitted on the outside of the grouting sleeve 220, and the bottom end of the sealing bag 100 is fixedly connected to the grouting sub-pipe 210, while the top end of the sealing bag 100 is fixedly connected to the outer wall of the grouting sleeve 220.

[0039] The support mechanism includes multiple support rods 300, which are arranged in groups of four. In this embodiment, two groups of support rods 300 are provided. The four support rods 300 in the same group are evenly distributed around the grouting sleeve 220. The two groups of support rods 300 are arranged sequentially along the axial direction of the grouting pipe 200. The group of support rods 300 near the top of the sealing bag 100 is the first support rod 310, and the group of support rods 300 near the bottom of the sealing bag 100 is the second support rod 320.

[0040] Reference Figure 1 and Figure 2 One end of the first support rod 310 passes through the grouting sleeve 220 and is connected to the side wall of the grouting sub-pipe 210. The other end of the first support rod 310 is inclined toward the top of the sealing bag 100 and abuts against the inner wall of the sealing bag 100. The second support rod 320 is rotatably connected to the grouting sleeve 220, with one end inserted into the grouting sleeve 220 and the other end inclined toward the bottom of the sealing bag 100 and abutting against the inner wall of the sealing bag 100. The grouting sub-pipe 210 is provided with a drive assembly 500 for driving the first support rod 310 and the second support rod 320 to rotate.

[0041] The drive assembly 500 includes a first drive block 510 and a second drive block 520 sleeved on the outside of the grouting sub-pipe 210. The grouting sleeve 220 has openings that correspond one-to-one with the first support rod 310, and the size of the openings is larger than the size of the first support rod 310. The first support rod 310 passes through the corresponding opening and is rotatably connected to the first drive block 510.

[0042] The second drive block 520 is connected to the second support rod 320 via the transmission hydraulic assembly 530, so that the second drive block 520 can drive the second support rod 320 to rotate.

[0043] When the staff pulls the grouting sub-pipe 210, the grouting sub-pipe 210 and the grouting sleeve 220 are relatively displaced, which causes the grouting sub-pipe 210 to drive the first support rod 310 and the second support rod 320 to rotate, thereby achieving support for the sealing bag 100.

[0044] The hydraulic transmission assembly 530 includes a hydraulic transmission tank 531 sleeved on the outside of the grouting sub-pipe 210, a first hydraulic transmission plug 532, and a second hydraulic transmission plug 533. The hydraulic transmission tank 531 is fixedly connected to the grouting sleeve 220. The first hydraulic transmission plug 532 is slidably and sealed to the hydraulic transmission tank 531 and can abut against one end of the second support rod 320 that passes through the grouting sleeve 220. The second hydraulic transmission plug 533 is slidably and sealed to the hydraulic transmission tank 531 and is fixedly connected to the second drive block 520.

[0045] When the grouting sub-pipe 210 and the grouting sleeve 220 are relatively displaced, the second drive block 520 drives the second transmission hydraulic plug 533 to move towards the bottom of the transmission hydraulic box 531, thereby increasing the pressure inside the transmission hydraulic box 531, which in turn pushes the first transmission hydraulic plug 532 to move away from the bottom of the transmission hydraulic box 531, thereby pushing the second support rod 320 to rotate.

[0046] Reference Figure 2 and Figure 4 Since the dimensions of the duct are not fixed, when one set of support rods 300 contacts the sidewall of the duct, the grouting sub-pipe 210 is unlikely to continue to move relative to the grouting sleeve 220, thus affecting the rotation of the other set of support rods 300. This results in a gap between the sealing bag 100 at the other set of support rods 300 and the sidewall of the duct. To prevent this from happening, both the first drive block 510 and the second drive block 520 are slidably connected to the grouting sub-pipe 210. Both the first drive block 510 and the second drive block 520 are equipped with locking components 600 for locking their sliding distance from the grouting sub-pipe 210. Both the first drive block 510 and the second drive block 520 are provided with multiple sliding grooves 521, each corresponding to a set of locking components 600.

[0047] Since the connection relationship of the locking component 600 of the first driving block 510 is similar to that of the locking component 600 on the second driving block 520, this embodiment takes the first driving block 510 as an example to illustrate the connection relationship of the locking component 600.

[0048] Reference Figure 3 The locking assembly 600 includes a locking spring 620 and a locking block 610 located in the corresponding sliding groove 521. One end of the locking spring 620 is fixedly connected to the locking block 610, and the other end is fixedly connected to the bottom of the sliding groove 521. Under the elastic force of the locking spring 620, the locking block 610 extends out of the sliding groove 521. The grouting sub-pipe 210 is provided with a locking groove 212 that engages with the portion of the locking block 610 that extends out of the sliding groove 521. Along the axial direction of the grouting sub-pipe 210, both ends of the portion of the locking block 610 that extends out of the sliding groove 521 are set as inclined surfaces.

[0049] In order to prevent relative rotation between the grouting sub-pipe 210 and the first drive block 510 and the second drive block 520 when the locking block 610 is disengaged from the locking groove 212, a sliding block 511 is fixedly connected to both the first drive block 510 and the second drive block 520. A sliding groove 213 is provided on the grouting sub-pipe 210 along its axial direction, and the sliding block 511 is slidably connected to the sliding groove 213.

[0050] Looking back Figure 1 and Figure 2 In order to prevent wrinkles from forming on the surface of the sealing bag 100 when the first support rod 310 and the second support rod 320 support the sealing bag 100, an elastic plate 700 is provided at the end of the first support rod 310 and the second support rod 320 away from the grouting sub-pipe 210.

[0051] The connection relationship between the elastic plate 700 and the corresponding support rod 300 is as follows: The end of the first support rod 310 away from the grouting sub-pipe 210 is rotatably connected to the first slider 311. The elastic plate 700, which is corresponding to the first support rod 310, is provided with a first sliding groove 710 that slides and connects with the first slider 311. In order to make it difficult for the first slider 311 to fall out of the first sliding groove 710, the first slider 311 is set as a T-shaped block, and the shape of the first sliding groove 710 is adapted to the shape of the first slider 311.

[0052] The second support rod 320 is rotatably connected to the end away from the grouting sub-pipe 210. The elastic plate 700 corresponding to the second support rod 320 is provided with a second sliding groove 720 that slides and connects to the second sliding groove 321. In order to prevent the first sliding groove 311 from easily falling out of the second sliding groove 720, the second sliding groove 721 is set as a T-shaped block, and the shape of the second sliding groove 721 is adapted to the shape of the second sliding groove 321.

[0053] In order to prevent the side of the elastic plate 700 from tearing the sealing bag 100, the side of the elastic plate 700 that contacts the sealing bag 100 is set as a curved surface.

[0054] Reference Figure 2 and Figure 5 In order to prevent the elastic plate 700 from affecting the retraction of the first support rod 310 and the second support rod 320, the two elastic plates 700 are connected by a pull rod 400, and both ends of the pull rod 400 are rotatably connected to the support rod 300 on the corresponding side.

[0055] When the rotation angle of the first support rod 310 and the second support rod 320 is too large, that is, when the distance between the two elastic plates 700 is smaller than that of the traction rod 400, the traction rod 400 will affect the support of the first support rod 310 and the second support rod 320. Therefore, in order to prevent the above situation from occurring, the traction rod 400 in this application is set as a telescopic rod. Specifically, the traction rod 400 includes a traction sub-rod 410 and a traction sleeve 420. The traction sleeve 420 is slidably sleeved on the outside of the traction sub-rod 410, and one end of the traction sub-rod 410 is rotatably connected to the elastic plate 700 corresponding to the second support rod 320. One end of the traction sleeve 420 is rotatably connected to the elastic plate 700 corresponding to the first support rod 310.

[0056] The implementation principle of this application embodiment is as follows: The worker connects the grouting sub-pipe 210 to the grout outlet end of the grouting pump, then puts the sealing bag 100 into the duct, and then holds the grouting sleeve 220 and pulls the grouting sub-pipe 210, so that the first support rod 310 and the second support rod 320 rotate until the two sets of support rods 300 drive the sealing bag 100 to contact the side wall of the duct. Then the worker starts the grouting pump to inject concrete slurry into the sealing bag 100. When the concrete slurry in the sealing bag 100 solidifies, the duct is sealed.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A grouting and sealing device for karst caves in karst areas, characterized in that: The device includes a sealing bag (100), a grouting pipe (200), and a support mechanism. The sealing bag (100) is fitted around the outside of the grouting pipe (200), with one end fixedly connected to the end of the grouting pipe (200) and the other end fixedly connected to the outer wall of the grouting pipe (200). The outer wall of the grouting pipe (200) has multiple grout outlet holes (211). The support mechanism includes multiple support rods (300), which are divided into multiple groups. Each group has at least two support rods (300). The multiple groups of support rods are arranged sequentially along the axial direction of the grouting pipe (200), and each support rod (300) is rotatably connected to the grouting pipe (200). The grouting pipe (200) is provided with a drive assembly (500) for driving the support rods (300) to rotate. The support rod (300) is provided in two sets, which are divided into a first support rod (310) and a second support rod (320). The grouting pipe (200) includes a grouting sub-pipe (210) and a grouting sleeve (220). The grouting sleeve (220) is slidably sleeved on the outside of the grouting sub-pipe (210). One end of the sealing bag (100) is fixedly connected to the end face of the grouting sub-pipe (210), and the other end is sleeved on the outside of the grouting sleeve (220) and fixedly connected to the outer wall of the grouting sleeve (220). The driving assembly (500) includes a drive assembly that is connected to the grouting sub-pipe (210) and the grouting sleeve (220). 10) The first drive block (510), the second drive block (520) and the transmission hydraulic assembly (530) are connected. The first support rod (310) passes through the grouting sleeve (220) and is rotatably connected to the first drive block (510). The second support rod (320) is rotatably connected to the wall of the grouting sleeve (220). The end of the second support rod (320) away from the sealing bag (100) is inserted into the grouting sleeve (220). The second drive block (520) is connected to the second support rod (320) through the transmission hydraulic assembly (530) to drive the second support rod (320) to rotate. Both the first drive block (510) and the second drive block (520) are slidably connected to the grouting sub-pipe (210). Both the first drive block (510) and the second drive block (520) are provided with locking components (600) for locking their sliding distance from the grouting sub-pipe (210). The locking assembly (600) includes a locking block (610) and a locking spring (620). The first driving block (510) and the second driving block (520) are each provided with a plurality of sliding grooves (521). Each sliding groove (521) corresponds to a set of locking assemblies (600). The locking spring (620) is located in the corresponding sliding groove (521). One end of the locking spring (620) is fixedly connected to the bottom of the sliding groove (521), and the other end is fixedly connected to the locking block (610). The grouting sub-pipe (210) is provided with a locking groove (212) for engaging with the locking block (610). Along the axial direction of the grouting sub-pipe (210), both ends of the locking block (610) are set as inclined surfaces.

2. The grouting and sealing device for karst caves in karst areas according to claim 1, characterized in that: Both sets of support rods (300) are provided with elastic plates (700) at their ends, and the first support rod (310) and the second support rod (320) are slidably connected to the corresponding elastic plates (700).

3. A grouting and sealing device for karst caves in karst areas according to claim 2, characterized in that: The side of the elastic plate (700) near the sealing bag (100) is set as an arc surface.

4. A grouting and sealing device for karst caves in karst areas according to claim 2, characterized in that: The two elastic plates (700) are connected by a tie rod (400).

5. A grouting and sealing device for karst caves in karst areas according to claim 4, characterized in that: Both ends of the traction rod (400) are rotatably connected to the elastic plate (700) on the corresponding side, and the traction rod (400) is a telescopic rod.

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