High-pressure grouting leaking stoppage device and method
Through components such as an annular grouting bag bag and pre-tight rubber tube in the high-pressure grouting leak plugging device, the problem of slurry loss in underground hollow sealing is solved, and more efficient sealing effect and stability is achieved, and the construction period is shortened.
Patent Information
- Application Number
- CN202510548125.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2025-07-25
AI Technical Summary
In the prior art, during the sealing process of underground voids, concrete slurry is prone to flow away with groundwater or lose through cracks, resulting in failure of sealing and a longer construction period.
A high-pressure grouting leak plugging device is adopted, including a grouting tube and annular grouting bag. A concrete slurry is injected into the grouting tube through a high-pressure grouting tube, allowing it to enter the annular grouting bag to expand, seal the underground cavity, and use a pre-tightened rubber tube and a sealing bowl to limit the slurry loss, and the exhaust component exhausts air to enhance the sealing effect.
It effectively limits the loss of concrete slurry, improves the success rate and stability of underground void sealing, and shortens the construction period.
Smart Images
Figure CN120367194A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of underground cavity plugging, and particularly to a high-pressure grouting leak plugging device and method. Background Technique
[0002] When pile foundation construction, tunnel shield, karst cave bridging or geological exploration is carried out in a geological environment with underground cavities, due to the existence of underground cavities, the geological structure is relatively unstable, and it is extremely easy to cause situations such as soil instability, collapse, and shield pressure loss during the construction process. Therefore, before construction, it is usually necessary to fill and plug the underground cavities to improve the geological stability of this area.
[0003] Currently, the plugging method for underground cavities usually adopts high-pressure grouting; during construction, after drilling an installation hole communicating with the underground cavity, the grouting pipe is inserted into the underground cavity through the installation hole, and finally, concrete slurry is injected into the underground cavity through the grouting pipe by a grouting device to achieve the plugging treatment of the underground cavity.
[0004] For the above-mentioned related technologies, firstly, since some underground cavities are connected to underground water sources, the concrete slurry actually injected into the underground cavities is extremely easy to flow away with the underground water, resulting in the failure of plugging the underground cavities; secondly, in order to prevent the subsequent injected concrete slurry from leaking from the gap between the grouting pipe and the installation hole, after the grouting pipe is inserted into the installation hole, it is necessary to first inject concrete slurry into the gap between the grouting pipe and the installation hole. After the concrete slurry between the grouting pipe and the installation hole solidifies and plugs the gap between the grouting pipe and the installation hole, then grout into the underground cavity through the grouting pipe. However, on the one hand, the concrete slurry used to plug the gap between the grouting pipe and the installation hole in the early stage is easy to block the grouting pipe, and on the other hand, it also leads to a longer overall construction period; therefore, there is room for improvement. Summary of the Invention
[0005] In order to facilitate better plugging of underground cavities, the present application provides a high-pressure grouting leak plugging device and method.
[0006] The high-pressure grouting leak plugging device and method provided by the present application adopt the following technical solutions: A high-pressure grouting leak plugging device includes a grouting pipe and an annular grouting bladder; The bottom end of the grouting pipe is sealed, and a plurality of first through holes are provided on the outer periphery of the bottom end of the grouting pipe to form a first perforated pipe section; The annular grouting bladder is coaxially sleeved on the outer periphery of the grouting pipe, and both ends of the annular grouting bladder are tied and fixed to the grouting pipe; the annular grouting bladder is arranged to wrap the first perforated pipe section; A high-pressure grout guiding pipe is also supported in the grouting pipe, and the high-pressure grout guiding pipe is communicated with the grouting pipe.
[0007] By adopting the above technical solution, when filling an underground cavity, a grouting pipe with an annular grouting bladder is inserted into the underground cavity, and a high-pressure grout guiding pipe is inserted into the grouting pipe. After connecting the high-pressure grout guiding pipe to a high-pressure grouting device, the high-pressure grouting device injects concrete slurry into the grouting pipe through the high-pressure grout guiding pipe. The concrete slurry injected into the grouting pipe enters the annular grouting bladder through the first perforated pipe section on the outer periphery of the bottom end of the grouting pipe, and the annular grouting bladder expands to achieve the filling and sealing of the underground cavity. Compared with the traditional method of directly injecting concrete slurry into the underground cavity, it effectively restricts the leakage of the concrete slurry injected into the cavity along with the groundwater flow or through the internal cracks of the cavity, which is beneficial to better filling the underground cavity.
[0008] Preferably, a pre-tightening rubber tube is sleeved on the outer periphery of the grouting pipe corresponding to the first perforated pipe section, and the pre-tightening rubber tube covers the first through holes of the first perforated pipe section.
[0009] By adopting the above technical solution, through the setting of the pre-tightening rubber tube, during subsequent grouting, the concrete slurry injected into the grouting pipe through the high-pressure grout guiding pipe can enter the annular grouting bladder after pushing away the pre-tightening rubber tube through the first through holes of the grouting pipe; after the grouting is completed, the first through holes at various parts of the first perforated pipe section of the grouting pipe can be blocked by the pre-tightening rubber to limit the situation that the concrete slurry injected into the annular grouting bladder at this time flows back into the grouting pipe through the first through holes.
[0010] Preferably, a plurality of second through holes are circumferentially formed on the outer periphery of the bottom end of the high-pressure grout guiding pipe to form a second perforated pipe section, and the second perforated pipe section of the high-pressure grout guiding pipe is arranged opposite to the first perforated pipe section of the grouting pipe; Two sealing leather cups are coaxially sleeved on the outer periphery of the high-pressure grout guiding pipe, and the outer peripheries of the two sealing leather cups are both abutted against the inner periphery of the grouting pipe; the two sealing leather cups form a grouting cavity, and the first perforated pipe section and the second perforated pipe section are located in the grouting cavity.
[0011] By adopting the above technical solution, a relatively sealed grouting cavity is formed by the two sealing leather cups on the outer periphery of the high-pressure grout guiding pipe, so that the concrete slurry flowing out through the second perforated pipe section of the high-pressure grout guiding pipe can enter the annular grouting bladder more concentratedly through the first perforated pipe section of the grouting pipe, which is beneficial to restricting the loss of the concrete slurry flowing out through the high-pressure grout guiding pipe through the gap between the high-pressure grout guiding pipe and the grouting pipe, and facilitating the better filling of the internal space of the annular grouting bladder with the concrete slurry.
[0012] Preferably, an annular limiting sleeve bag is further sleeved on the outer periphery of the annular grouting bladder; the length and diameter of the annular limiting sleeve bag are both smaller than those of the annular grouting bladder; both ends of the annular limiting sleeve bag are tied to the outer periphery of the grouting pipe, and the annular grouting bladder is located inside the annular limiting sleeve bag.
[0013] By adopting the above technical solution, the annular grouting bladder is wrapped and protected by the annular limiting sleeve. On the one hand, when the grouting pipe is lowered into the underground cavity, it is beneficial to limit the friction between the annular limiting sleeve and the inner wall of the cavity, thereby preventing damage. On the other hand, when grouting into the annular grouting bladder subsequently, the annular limiting sleeve can be used to perform annular constraint on the annular grouting bladder to prevent the annular grouting bladder from being burst by the injected concrete slurry.
[0014] Preferably, the grouting pipe is further provided with an exhaust assembly, and the exhaust assembly is located inside the annular grouting bladder; the exhaust assembly includes an exhaust pipe connected to the outer periphery of the grouting pipe, the exhaust pipe is communicated with the grouting pipe, and the communication position between the exhaust pipe and the grouting pipe is outside the grouting cavity; the exhaust pipe is also filled with breathable cotton, and a limiting plate is coaxially fixed at one end of the exhaust pipe close to the grouting pipe, and a plurality of ventilation holes are formed in the limiting plate.
[0015] By adopting the above technical solution, when the annular sleeve is installed on the outer periphery of the grouting pipe, there will inevitably be a certain amount of air, which is likely to affect the entry of the concrete slurry into the annular grouting bladder and cause it difficult to fill the annular grouting bladder with the concrete slurry; through the arrangement of the exhaust assembly, the concrete slurry injected into the annular grouting bladder subsequently can drive the original air inside the annular grouting bladder to be discharged into the grouting pipe through the breathable cotton in the exhaust pipe and then discharged through the grouting pipe, which is beneficial to making the concrete slurry in the subsequent grouting pipe easier to be injected into the annular grouting bladder and can better fill the annular grouting bladder; at the same time, when the concrete slurry injected into the annular grouting bladder subsequently enters the exhaust pipe, it can cooperate with the end of the exhaust pipe to squeeze the breathable cotton in the direction close to the grouting pipe, thereby compressing the internal hole structure of the breathable cotton and effectively restricting the concrete slurry from entering the grouting pipe through the exhaust pipe.
[0016] Preferably, the exhaust pipe is located at the top of the annular grouting bladder, and the exhaust pipe bends upward and extends away from the grouting pipe.
[0017] By adopting the above technical solution, during the process of injecting concrete slurry into the annular grouting bladder, the time for the concrete slurry injected into the annular grouting bladder to enter the exhaust pipe can be effectively delayed, which is beneficial to ensuring the full discharge of the air inside the annular grouting bladder.
[0018] Preferably, a connecting plate is sleeved and fixed on the high-pressure grouting conduit corresponding to the sealing leather cup, and the sealing leather cup is fixed on the corresponding connecting plate by bolts and nuts.
[0019] By adopting the above technical solution, the sealing leather cup can be firmly connected to the high-pressure slurry guiding pipe. When the high-pressure slurry guiding pipe together with the two sealing leather cups are subsequently lowered into the grouting pipe, it is helpful to limit the relative movement between the sealing leather cup and the high-pressure slurry guiding pipe.
[0020] A method for using a high-pressure grouting plugging device, using the high-pressure grouting plugging device, comprises the following steps: S1: Assembling the plugging device: sleeve the annular grouting bag onto the outer periphery of the grouting pipe, and wrap the annular grouting bag around the first flower pipe section of the grouting pipe, and tie and fix the two ends of the annular grouting bag onto the grouting pipe; S2: Drilling of installation holes: After detecting and determining the location of the underground cavity, drilling installation holes above the underground cavity and connecting the installation holes with the underground cavity; S3: Grouting pipe installation: insert the grouting pipe into the installation hole; and move the grouting pipe downward until the annular grouting bag is located in the underground cavity.
[0021] S4: Installation of high-pressure grouting pipe: insert the high-pressure grouting pipe into the grouting pipe; S5: Grouting and sealing: Connect the high-pressure grouting pipe to the high-pressure grouting equipment, and inject grouting into the grouting pipe through the high-pressure grouting equipment. The concrete slurry injected into the grouting pipe is injected into the annular grouting bag through the first flower pipe section on the outer periphery of the grouting pipe to expand the annular grouting bag and seal the underground cavity.
[0022] By adopting the above technical solution, the annular grouting bag is sleeved on the outer periphery of the grouting pipe and covers the first flower tube section, so that the concrete slurry subsequently injected into the grouting pipe can enter the annular grouting bag through the first flower tube section, so as to drive the annular grouting bag to expand and fill the internal space of the underground cavity, thereby achieving the plugging of the underground cavity; avoiding the problem of concrete slurry being washed away by groundwater inside the cavity or lost along the cracks when being directly injected into the cavity, which is beneficial to improving the success rate and stability of underground cavity plugging.
[0023] Preferably, in step S1, when tying the end of the annular grouting bag, after the end of the annular grouting bag is closely attached to the outer periphery of the grouting pipe, the end of the annular grouting bag is first tied to the grouting pipe by a first steel wire; then the tail end of the annular grouting bag is turned outward and folded back to the outer periphery of the annular grouting bag, and the end of the annular grouting bag is tied to the grouting pipe by a second steel wire; finally, the tail end of the annular grouting bag is turned outward and folded back to the outer periphery of the grouting pipe, and the end of the annular grouting bag is tied to the grouting pipe by a third steel wire.
[0024] By adopting the above technical solution, an S-shaped structure is formed at the end of the annular grouting bladder, effectively improving the sealing performance at the connection between the annular grouting bladder and the grouting pipe. When injecting concrete slurry into the annular grouting bladder subsequently, the annular grouting bladder is restricted from moving relative to the grouting pipe under stress, preventing the leakage of concrete slurry.
[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. When performing the operation of plugging underground cavities, insert the grouting pipe together with the annular grouting bladder into the underground cavity, and inject concrete slurry into the grouting pipe through the high-pressure grout guide pipe. The concrete slurry flows into the annular grouting bladder through the first perforated pipe section at the bottom end of the grouting pipe, filling the annular grouting bladder and effectively restricting the leakage of the concrete slurry in the underground water flow or cavity fissures, avoiding the loss of the concrete slurry, thereby improving the plugging effect on the underground cavity.
[0026] 2. By sleeving a pre-tightened rubber tube around the outer periphery of the first perforated pipe section of the grouting pipe, during the grouting process, the concrete slurry pushes open the pre-tightened rubber tube by pressure and enters the annular grouting bladder through the first through holes to achieve the plugging of the underground cavity. After the grouting is completed, the pre-tightened rubber tube will reattach to the first perforated pipe section of the grouting pipe, thereby closing each first through hole and preventing the concrete slurry in the annular grouting bladder from flowing back into the grouting pipe.
[0027] 3. By providing an exhaust assembly, when the concrete slurry is injected into the annular grouting bladder, the air inside the annular grouting bladder can be discharged to the outside of the grouting pipe through the breathable cotton in the exhaust pipe, enabling the concrete slurry to fill the annular grouting bladder more smoothly, which is beneficial to improving the grouting efficiency and sealing effect. In addition, when the concrete slurry enters the exhaust pipe during the injection process, the breathable cotton at the end of the exhaust pipe will be squeezed under the pressure of the concrete slurry, thereby compressing the pore structure of the breathable cotton and effectively preventing the concrete slurry from further flowing into the exhaust pipe and the grouting pipe, ensuring the stability and reliability of the grouting process. Description of the Drawings
[0028] Figure 1 is a schematic internal structure diagram of the leakage plugging device according to the embodiment of the present application.
[0029] Figure 2 is a schematic diagram of the state of injecting grout into the annular grouting bladder according to the embodiment of the present application.
[0030] Figure 3 is Figure 1 an enlarged schematic diagram of part A in
[0031] Figure 4 is Figure 1 an enlarged schematic diagram of part B in
[0032] Figure 5It is a schematic diagram showing the state when the top end of the annular grouting bladder is tied in the embodiment of the present application.
[0033] Figure 6 It is a schematic diagram showing the state when the top end of the annular limiting bladder is tied in the embodiment of the present application.
[0034] Explanation of reference numerals: 1. Grouting pipe; 10. First through hole; 11. Pre-tightening rubber tube; 2. Annular grouting bladder; 21. Annular limiting sleeve bag; 3. High-pressure grout guiding pipe; 30. Second through hole; 31. Connecting plate; 32. Sealing leather cup; 4. Exhaust pipe; 41. Breathable cotton; 42. Limiting plate. Detailed implementation manners
[0035] The following further elaborates on the present application in conjunction with the Figure 1-5 accompanying drawings.
[0036] The embodiment of the present application discloses a high-pressure grouting plugging device and method. Referring to Figure 1 and Figure 2 , it includes a grouting pipe 1. The bottom end port of the grouting pipe 1 is plugged. A plurality of first through holes 10 are formed on the outer periphery of the grouting pipe 1 to form a first perforated pipe section. An annular grouting bladder 2 is coaxially sleeved on the outer periphery of the grouting pipe 1, and both ends of the annular grouting bladder 2 are tied and fixed to the outer periphery of the grouting pipe 1. The annular grouting bladder 2 is arranged to wrap the first perforated pipe section.
[0037] When subsequently plugging an underground cavity, after drilling an installation hole communicating with the underground cavity on the ground, the grouting pipe 1 with the annular grouting bladder 2 is lowered through the installation hole until the annular grouting bladder 2 is located inside the underground cavity. Then, by injecting concrete slurry into the grouting pipe 1, the concrete slurry injected into the grouting pipe 1 enters the annular grouting bladder 2 through the respective first through holes 10 of the first perforated pipe section and drives the grouting bladder to expand, thereby realizing the plugging of the underground cavity. In actual application, the maximum diameter of the annular grouting bladder 2 when expanded should be much larger than the diameter of the installation hole to ensure that the subsequent annular grouting bladder 2 can plug the gap between the grouting pipe 1 and the installation hole after expansion.
[0038] In this embodiment, the grouting pipe 1 is made of an existing PVC pipe. In actual use, the diameter and quantity of the first through holes 10 of the first perforated pipe section of the grouting pipe 1 can be adjusted according to actual grouting requirements. In the actual application process, when the position of the underground cavity is relatively deep, the grouting pipe 1 can be spliced in sections according to actual needs. The annular grouting bladder 2 is made of an anti-seepage membrane. Both ends of the annular grouting bladder 2 are specifically tied to the outer periphery of the grouting pipe 1 by wires in cooperation with adhesive tapes.
[0039] Referring to Figure 2 and Figure 3, a pre-tightening rubber tube 11 is sleeved on the outer periphery of the grouting pipe 1. The pre-tightening rubber tube 11 is arranged to cover each first through hole 10 of the first perforated pipe section of the grouting pipe 1. When high-pressure grouting is carried out into the grouting pipe 1 subsequently, the concrete slurry injected into the grouting pipe 1 can push the pre-tightening rubber tube 11 away from the outer periphery of the grouting pipe 1 through the grouting pressure and further flow into the annular grouting bladder 2; after the grouting is completed, the pre-tightening rubber tube 11 fits back onto the outer periphery of the grouting pipe 1 to block each first through hole 10 of the grouting pipe 1, effectively restricting the situation that the concrete slurry in the annular grouting bladder 2 flows back into the grouting pipe 1. The pre-tightening rubber tube 11 is tied to the grouting pipe 1 with steel wires and adhesive tape, which is beneficial to restricting the displacement of the pre-tightening rubber tube 11 during subsequent use.
[0040] Refer to Figure 1 and Figure 4 , an annular limiting sleeve bag 21 is also sleeved on the outer periphery of the annular grouting bladder 2. Specifically, the annular limiting sleeve bag 21 is made of a woven bag material, and the overall length and diameter of the annular limiting sleeve bag 21 are slightly smaller than those of the annular grouting bladder 2; both ends of the annular limiting sleeve bag 21 are fixed to the outer periphery of the grouting pipe 1 by wire binding, and the annular limiting sleeve bag 21 is arranged to wrap and cover the annular grouting bladder 2. Through the setting of the annular limiting sleeve bag 21, on the one hand, when the grouting pipe 1 is lowered, the annular grouting bladder 2 can be restricted from contacting the hole wall through the annular limiting sleeve bag 21, so as to effectively avoid the situation that the annular grouting bladder 2 is damaged. At the same time, when grouting into the annular grouting bladder 2 subsequently, the annular grouting bladder 2 can be supported and constrained by the annular limiting sleeve bag 21 to restrict the situation that the concrete slurry injected into the annular grouting bladder 2 bursts the annular grouting bladder 2.
[0041] A high-pressure slurry guiding pipe 3 is coaxially supported in the grouting pipe 1, and the bottom end port of the high-pressure slurry guiding pipe 3 is blocked. A plurality of second through holes 30 are evenly formed on the outer periphery of the bottom end of the high-pressure slurry guiding pipe 3 to form a second perforated pipe section; the second perforated pipe section of the high-pressure slurry guiding pipe 3 is arranged opposite to the first perforated pipe section of the grouting pipe 1 to realize the connection between the grouting pipe 1 and the high-pressure slurry guiding pipe 3.
[0042] Refer to Figure 1 and Figure 4The outer periphery of the high-pressure grouting pipe 3 is coaxially sleeved with two sealing leather cups 32, a gap is left between the two sealing leather cups 32, and the bowls of the two sealing leather cups 32 are arranged oppositely, the outer peripheries of the bowls of the two sealing leather cups 32 are both in contact with the inner periphery of the grouting pipe 1, and the two sealing leather cups 32 cooperate to form a grouting cavity, and the first flower tube section and the second flower tube section are both located between the two sealing leather cups 32. During subsequent grouting, after the high-pressure grouting pipe 3 is connected to the high-pressure grouting equipment, the high-pressure grouting equipment is used to grout the high-pressure grouting pipe 3, and the concrete slurry injected into the high-pressure grouting pipe 3 enters the grouting cavity formed by the two sealing leather cups 32 through the second through hole 30 of the second flower tube section, and further enters the annular grouting bag 2 through the first flower tube section of the grouting pipe 1, effectively limiting the concrete slurry flowing out of the high-pressure grouting pipe 3 from flowing into the gap between the grouting pipe 1 and the high-pressure grouting pipe 3 to cause pressure loss, which is conducive to realizing the centralized flow of concrete slurry.
[0043] Two connecting plates 31 are fixedly mounted on two sealing leather cups 32 corresponding to the outer periphery of the high-pressure slurry guide pipe 3. The two sealing leather cups 32 are respectively fixed on the opposite sides of the two connecting plates 31 by bolts and nuts, so that the two sealing leather cups 32 are firmly connected to the outer periphery of the high-pressure slurry guide pipe 3, thereby preventing the two sealing leather cups 32 from moving relative to the high-pressure slurry guide pipe 3 when the high-pressure slurry guide pipe 3 is subsequently installed into the grouting pipe 1.
[0044] Reference Figure 1 and Figure 4 , an exhaust assembly is also provided on the periphery of the grouting pipe 1, and the exhaust assembly is located in the annular grouting bag 2; the exhaust assembly includes an exhaust pipe 4, which is fixed on the periphery of the grouting pipe 1 to connect with the inner cavity of the grouting pipe 1; the connection between the exhaust pipe 4 and the grouting pipe 1 is located above the upper sealing leather cup 32 of the high-pressure grouting pipe 1. The exhaust pipe 4 is filled with breathable cotton 41, and a limiting plate 42 is coaxially supported at one end of the exhaust pipe 4 close to the inner cavity of the grouting pipe 1, and a plurality of breathable holes are evenly distributed on the limiting plate 42, and the breathable cotton 41 abuts against one side of the limiting plate 42. The exhaust pipe 4 is located in the grouting pipe 1. The pipe mouth end is set to limit the movement of the limiting plate 42 toward the pipe mouth end of the grouting pipe 1.
[0045] After the subsequent concrete slurry enters the annular grouting bag 2, the residual air in the annular grouting bag 2 can be driven to be discharged into the grouting pipe 1 through the breathable cotton 41 and the limiting plate 42 in the exhaust pipe 4, and discharged through the grouting pipe 1, so that the concrete slurry can better fill the annular grouting bag 2; at the same time, when the concrete slurry injected into the annular grouting bag 2 enters the exhaust pipe 4, the concrete slurry entering the exhaust pipe 4 can be used in conjunction with the limiting plate 42 to squeeze the breathable cotton 41 toward the direction close to the grouting pipe 1, so as to compress the internal pore structure of the breathable cotton 41, thereby limiting the leakage of the concrete slurry in the annular grouting bag 2 through the exhaust pipe 4.
[0046] The exhaust pipe 4 is located at the top of the annular grouting bladder 2, and the exhaust pipe 4 is bent upward in a direction away from the grouting pipe 1, which is convenient for better extending the time for the concrete slurry injected into the annular grouting bladder 2 to enter the exhaust pipe 4, and thus is beneficial to better discharging the residual air inside the annular grouting bladder 2.
[0047] A high-pressure grouting leak stoppage method, using the above high-pressure grouting leak stoppage device, includes the following steps: S1: Assembly of the leak stoppage device: The specific steps are as follows: S1.1: Installation of the pre-tightening rubber tube 11: Refer to Figure 1 and Figure 3 , sleeved the pre-tightening rubber tube 11 on the outer periphery of the grouting pipe 1, and made the pre-tightening rubber tube 11 cover each first through hole 10 of the first perforated section of the grouting pipe 1, and fixed the pre-tightening rubber tube 11 on the grouting pipe 1 by steel wires. After the steel wire binding is completed, further bind the pre-tightening rubber tube 11 with adhesive tape, and make the adhesive tape cover the original steel wire.
[0048] S1.2: Installation of the annular grouting bladder 2: Refer to Figure 4 and Figure 5 , the specific steps are as follows: S1.2.1: Sleeved the annular grouting bladder 2 on the outer periphery of the grouting pipe 1, and made the annular grouting bladder 2 cover the pre-tightening rubber tube 11 on the outer periphery of the grouting pipe 11; S1.2.2: After the end of the annular grouting bladder 2 is closely attached to the outer periphery of the grouting pipe 1, bind the end of the annular grouting bladder 2 to the grouting pipe 1 by the first steel wire; S1.2.3: Turn the tail end of the annular grouting bladder 2 outwards and fold it back to the outer periphery of the annular grouting bladder 2, and bind the end of the annular grouting bladder 2 to the grouting pipe 1 by the second steel wire; S1.2.4: Then turn the tail end of the annular grouting bladder 2 outwards and fold it back to the outer periphery of the grouting pipe 1, and bind the end of the annular grouting bladder 2 to the grouting pipe 1 by the third steel wire; S1.2.5: Further bind the end of the annular grouting bladder 2 with adhesive tape, and make the adhesive tape cover the original steel wire.
[0049] S1.3: Installation of the annular limiting sleeve bag 21: Refer to Figure 5 and Figure 6 , the specific steps are as follows: S1.3.1: Install and sleeve the annular limiting sleeve bag 21 on the outer periphery of the annular grouting bladder 2, and make the annular limiting sleeve bag 21 wrap and cover the annular grouting bladder 2; S1.3.2: Press the tail end of the annular grouting bladder 2 into the tail end of the annular limiting sleeve bag 21; S1.3.3: Bind the tail end of the annular limiting sleeve bag 21 and the tail end of the annular grouting bladder 2 to the grouting pipe 1 by the first steel wire; S1.3.4: Turn the tail end of the annular limiting sleeve bag 21 outwards and fold it back to the outer periphery of the annular limiting sleeve bag 21, and tie the tail end of the annular limiting sleeve bag 21 and the tail end of the annular grouting bladder bag 2 to the grouting pipe 1 with a second wire; S1.3.5: Turn the tail end of the annular limiting sleeve bag 21 outwards and fold it back to the outer periphery of the grouting pipe 1, and tie the end of the annular limiting sleeve bag 21 to the grouting pipe 1 with a third wire; S1.3.6: Further tie the end of the annular limiting sleeve bag 21 with adhesive tape, and make the adhesive tape cover the original wire.
[0050] By using three wires to tie and fix both the annular grouting bladder bag 2 and the annular grouting bladder bag 2, an S-shaped structure is formed at both ends of the annular grouting bladder bag 2 and the annular grouting bladder bag 2, which is beneficial to improving the connection strength and sealing performance between both ends of the annular grouting bladder bag 2 and the annular grouting bladder bag 2 and the grouting pipe 1, and restricting the relative movement between the annular grouting bladder bag 2 and the annular grouting bladder bag 2 and the grouting pipe 1 when grouting into the annular grouting bladder bag 2 subsequently, resulting in the annular grouting bladder bag 2 and the annular grouting bladder bag 2 slipping off and causing the leakage of the concrete slurry.
[0051] S2: Drilling of the installation hole: After detecting and determining the position of the underground cavity, drill an installation hole above the underground cavity and connect the installation hole with the underground cavity. When drilling the installation hole, appropriate drilling rigs and drilling parameters should be selected according to the size and shape of the underground cavity to ensure the quality and accuracy of the installation hole.
[0052] S3: Installation of the grouting pipe 1: Refer to Figure 1 and Figure 2 , insert the grouting pipe 1 downwards into the installation hole, and move the grouting pipe 1 downwards until the annular grouting bladder bag 2 is located inside the underground cavity. When inserting the grouting pipe 1, attention should be paid to maintaining the verticality and stability of the grouting pipe 1 to avoid tilting or deviation of the grouting pipe 1 during the insertion process. After the insertion is completed, the position of the grouting pipe 1 should be corrected to ensure that the annular grouting bladder bag 2 is completely located inside the underground cavity.
[0053] S4: Installation of the high-pressure grout guiding pipe 3: Refer to Figure 1 and Figure 2 , insert the high-pressure grout guiding pipe 3 downwards into the grouting pipe 1 and move it into place.
[0054] S5: Grouting and plugging: The specific steps are as follows: S5.1: Positioning of the high-pressure grouting equipment: Connect the top pipe end of the high-pressure grout guiding pipe 3 to the high-pressure grouting equipment; S5.2: Grouting Plugging: Through a high-pressure grouting device, grout is injected into the grouting pipe 1 via the high-pressure grout conduit 3. The concrete grout injected into the grouting pipe 1 is injected into the annular grouting bladder 2 through the first perforated section on the outer periphery of the grouting pipe 1, so that the annular grouting bladder 2 expands and plugs the underground cavity.
[0055] During the grouting process, appropriate grouting pressure and flow rate should be selected according to the size and shape of the underground cavity to ensure that the concrete grout can be evenly injected into the annular grouting bladder 2.
[0056] In this application, the grouting pipe 1 with the annular grouting bladder 2 is installed into the underground cavity, and the concrete grout is injected into the annular grouting bladder 2 by the cooperation of the high-pressure grout conduit 3 and the grouting pipe 1. The injected concrete grout is used to drive the annular grouting bladder 2 to expand, so as to realize the filling and plugging of the underground hole, effectively avoiding the situation that the concrete grout injected into the underground cavity is washed away by groundwater or lost through the cracks of the underground cavity, which is convenient for better plugging of the underground cavity.
[0057] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of this application should be covered within the protection scope of this application.
Claims
1. A high-pressure grouting leak stoppage device, characterized in that: It includes a grouting pipe (1) and an annular grouting bladder (2); The bottom end of the grouting pipe (1) is sealed, and a plurality of first through holes (10) are formed on the outer periphery of the bottom end of the grouting pipe (1) to form a first perforated pipe section; The annular grouting bladder (2) is coaxially sleeved on the outer periphery of the grouting pipe (1), and both ends of the annular grouting bladder (2) are tied and fixed to the grouting pipe (1); the annular grouting bladder (2) is arranged to wrap the first perforated pipe section; A high-pressure grout guide pipe (3) is also supported in the grouting pipe (1), and the high-pressure grout guide pipe (3) is communicated with the grouting pipe (1).
2. The high-pressure grouting leak plugging device according to claim 1, characterized in that: A pre-tightening rubber pipe (11) is sleeved on the outer periphery of the grouting pipe (1) corresponding to the first perforated pipe section, and the pre-tightening rubber pipe (11) covers the first through holes (10) of the first perforated pipe section.
3. The high-pressure grouting leak stoppage device according to claim 2, characterized in that: A plurality of second through holes (30) are formed in a circumferential manner on the outer periphery of the bottom end of the high-pressure grout guide pipe (3) to form a second perforated pipe section, and the second perforated pipe section of the high-pressure grout guide pipe (3) is arranged opposite to the first perforated pipe section of the grouting pipe (1); Two sealing leather cups (32) are coaxially sleeved on the outer periphery of the high-pressure grout guide pipe (3), and the outer peripheries of the two sealing leather cups (32) are abutted against the inner periphery of the grouting pipe (1); the two sealing leather cups (32) form a grouting cavity, and the first perforated pipe section and the second perforated pipe section are located in the grouting cavity.
4. A high-pressure grouting leak stoppage device according to claim 1, characterized in that: An annular limiting sleeve bag (21) is also sleeved on the outer periphery of the annular grouting bladder (2); the length and diameter of the annular limiting sleeve bag (21) are both smaller than those of the annular grouting bladder (2); both ends of the annular limiting sleeve bag (21) are tied to the outer periphery of the grouting pipe (1), and the annular grouting bladder (2) is located inside the annular limiting sleeve bag (21).
5. The high-pressure grouting leak plugging device according to claim 3, characterized in that: The grouting pipe (1) is also provided with an exhaust assembly, and the exhaust assembly is located inside the annular grouting bladder (2); the exhaust assembly includes an exhaust pipe (4) connected to the outer periphery of the grouting pipe (1), the exhaust pipe (4) is communicated with the grouting pipe (1), and the communication part of the exhaust pipe (4) and the grouting pipe (1) is located outside the grouting cavity; breathable cotton (41) is also filled in the exhaust pipe (4), a limiting plate (42) is coaxially fixed at one end of the exhaust pipe (4) close to the grouting pipe (1), and a plurality of breathable holes are formed in the limiting plate (42).
6. The high-pressure grouting leakage plugging device according to claim 5, wherein: The exhaust pipe (4) is located at the top of the annular grouting bladder (2), and the exhaust pipe (4) bends upward and extends in a direction away from the grouting pipe (1).
7. A high-pressure grouting leak plugging device according to claim 3, characterized in that: A connecting plate (31) is sleeved and fixed on the high-pressure grout guide pipe (3) corresponding to the sealing leather cup (32), and the sealing leather cup (32) is fixed on the corresponding connecting plate (31) by bolts and nuts.
8. A high-pressure grouting leak plugging method, which uses the high-pressure grouting leak plugging device described in any one of the above claims 1 to 7, is characterized in that: It includes the following steps: It includes the following steps: S1: Leakage plugging device assembly: Sleeve the annular grouting bladder (2) on the outer periphery of the grouting pipe (1), and make the annular grouting bladder (2) wrap the first perforated pipe section of the grouting pipe (1), and tie and fix both ends of the annular grouting bladder (2) to the grouting pipe (1); S2: Drilling of installation holes: After detecting and determining the position of the underground cavity, drill installation holes above the underground cavity and connect the installation holes with the underground cavity; S3: Installation of grouting pipe (1): Insert the grouting pipe (1) into the installation hole; and lower the grouting pipe (1) until the annular grouting bladder (2) is located inside the underground cavity; S4: Installation of high-pressure grout conduit (3): Insert the high-pressure grout conduit (3) into the grouting pipe (1); S5: Grouting and plugging: Connect the high-pressure grout conduit (3) with high-pressure grouting equipment, and grout into the grouting pipe (1) through the high-pressure grouting equipment via the high-pressure grout conduit (3). The concrete grout injected into the grouting pipe (1) is injected into the annular grouting bladder (2) through the first perforated pipe section on the outer periphery of the grouting pipe (1), so that the annular grouting bladder (2) expands and plugs the underground cavity.
9. A high-pressure grouting and leakage plugging method according to claim 8, wherein: In step S1, when binding the end of the annular grouting bladder (2), after closely attaching the end of the annular grouting bladder (2) to the outer periphery of the grouting pipe (1), first tie the end of the annular grouting bladder (2) to the grouting pipe (1) with the first wire; then turn the tail end of the annular grouting bladder (2) outwards and fold it back to the outer periphery of the annular grouting bladder (2), tie the end of the annular grouting bladder (2) to the grouting pipe (1) with the second wire, and finally turn the tail end of the annular grouting bladder (2) outwards and fold it back to the outer periphery of the grouting pipe (1), and tie the end of the annular grouting bladder (2) to the grouting pipe (1) with the third wire.