A pre-buried grouting pipe applied to three-stage grouting for leakage stopping of underground station

Abstract

The application relates to the technical field of pre-embedded grouting pipes, in particular to a pre-embedded grouting pipe applied to three-stage grouting plugging of an underground station, which comprises a building mechanism, a plurality of groups of grouting pipe bodies are arranged on the building mechanism, a butt joint mechanism and a plugging prevention mechanism are further arranged, a butt joint mechanism is arranged between every two grouting pipe bodies in a group, and a plugging prevention mechanism is arranged between every group of grouting pipe bodies and a connecting assembly; the pre-embedded pipe body with a large inner diameter is adopted, the flow section of the grouting channel is effectively increased, the flow resistance in the pipe is reduced, the grouting pressure can be fully transmitted to the gap behind the structure, and problems such as low grouting efficiency and insufficient slurry diffusion caused by too small pipe diameter are avoided; meanwhile, the three-stage grouting process is matched, the leakage water of the underground station structure can be treated in a whole cycle, full coverage and targeted system, and the reliability and integrity of the plugging are obviously improved.

Description

Technical Field

[0001] This invention relates to the field of pre-embedded grouting pipe technology, specifically a pre-embedded grouting pipe used for three-stage grouting and leak sealing in underground stations. Background Technology

[0002] Pre-embedded grouting pipes are pipe structures that are pre-installed in weak parts such as structural joints before concrete pouring. They provide a permanent and precise channel for subsequent grouting and leak sealing, so that when leakage occurs in the structure, it can be repaired quickly and effectively without damaging the main structure.

[0003] Chinese patent CN215290125U discloses a novel pre-embedded grouting pipe, including a grouting conduit and a grouting pipe. The grouting conduit and the grouting pipe are connected. Several grouting holes are provided through the side wall of the grouting pipe. A replacement pipe is inserted inside the grouting conduit. The side wall of the grouting conduit is provided with a fixing structure for fixing the replacement pipe and the grouting conduit. This patent has the effect of making cleaning more convenient.

[0004] However, the above-mentioned patent has the following shortcomings: the traditional pre-embedded pipe diameter is too small, and the material inside the grouting pipe cannot be completely cleaned after grouting is completed. Grouting material is easily left inside the pipe, causing blockage of the grouting pipe, resulting in low grouting efficiency and incomplete grouting effect; it is also inconvenient to connect the grouting pipe body on site; at the same time, when the grouting pipe body is pre-embedded, underground soil is easy to move into the inside of the grouting pipe body through the grouting hole, causing blockage.

[0005] Therefore, the present invention provides a pre-embedded grouting pipe for three-stage grouting and leak sealing in underground stations. Summary of the Invention

[0006] The purpose of this invention is to provide a pre-embedded grouting pipe for three-stage grouting and leak sealing in underground stations, so as to solve the problems mentioned in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problem is: a pre-embedded grouting pipe for three-stage grouting and leak sealing in underground stations, including a building structure, on which multiple sets of grouting pipe bodies are provided, and also including a docking mechanism and an anti-blocking mechanism;

[0008] In a set of grouting pipe bodies, a docking mechanism is provided between every two grouting pipe bodies. The docking mechanism includes a connecting component disposed between the two grouting pipe bodies, and a snap-fit ​​component is provided between the two grouting pipe bodies and the connecting component.

[0009] Each group of grouting pipes and connecting components is provided with an anti-blocking mechanism, which includes a support component on the connecting component and an elastic component.

[0010] Furthermore, the building structure includes an enclosure structure and cast-in-place waterproof concrete side walls. The cast-in-place waterproof concrete side walls are provided with an inner wall skin. Multiple tee connectors are fixedly installed on the grouting pipe body. Each tee connector is fixedly installed with a pre-embedded galvanized steel pipe. A waterproof layer is provided between the cast-in-place waterproof concrete side walls and the grouting pipe body. A longitudinal construction joint is provided on one side of the grouting pipe body. Multiple wall-mounted trenches adapted to the grouting pipes are provided on the cast-in-place waterproof concrete side walls.

[0011] Furthermore, each of the grouting pipes is provided with multiple grouting holes.

[0012] Furthermore, the connecting assembly includes an intermediate connecting sleeve that fits between the two grouting pipes, and the intermediate connecting sleeve has multiple sets of connecting holes.

[0013] Furthermore, each set of connecting holes is connected to a first spring, and the end of each set of first springs is connected to a snap-fit ​​tab.

[0014] Furthermore, each of the grouting pipe bodies has a snap-fit ​​groove on its inner wall that is compatible with the snap-fit ​​piece.

[0015] Furthermore, the support assembly includes two symmetrically fixed connecting plates installed on the inner wall of the intermediate connecting sleeve. A mating sleeve is rotatably installed between the two connecting plates via a bearing. A central shaft is damped and slidably installed on the inner side of the mating sleeve. An operating rod is welded to one side of the central shaft at the outermost end.

[0016] Furthermore, the elastic component includes multiple support shells fixedly mounted on the central shaft. Each support shell has multiple second springs connected to its inner wall. The ends of the multiple second springs are connected to a telescopic plate that is slidably connected to the support shell. Multiple sealing blocks adapted to the grouting holes are fixedly mounted on the telescopic plate.

[0017] Furthermore, each of the grouting pipes has a groove on its inner wall that is compatible with the sealing block.

[0018] The beneficial effects of this invention are:

[0019] (1) By using a pre-embedded pipe with a larger inner diameter, the present invention effectively increases the flow cross-section of the grouting channel, reduces the flow resistance inside the pipe, and enables the grouting pressure to be fully transmitted to the void behind the structure, avoiding problems such as low grouting efficiency and insufficient grout diffusion caused by the pipe diameter being too small. At the same time, in conjunction with the three-stage grouting process, it can carry out full-cycle, full-coverage, and targeted systematic treatment of water leakage in underground station structures, significantly improving the reliability and integrity of the leak sealing. It also has the ability to perform repeated grouting multiple times, enabling precise and timely reinforcement grouting of repeatedly seeping areas, greatly reducing the cost of subsequent treatment.

[0020] (2) By moving the grouting pipe body, the grouting pipe body can squeeze the snap-fit ​​piece through the snap-fit ​​groove. When the grouting pipe body is attached to the intermediate connecting sleeve, the first spring can use its own elastic force to drive the snap-fit ​​piece to engage with the snap-fit ​​groove, so that the snap-fit ​​piece and the snap-fit ​​groove cooperate to connect the grouting pipe body and the intermediate connecting sleeve, thereby facilitating the splicing of multiple grouting pipe bodies into a group, so as to pre-embed grouting pipe bodies of appropriate length according to the length of the underground station.

[0021] (3) In this invention, after the grouting pipe body is connected to the intermediate connecting sleeve, the central shaft is inserted into the inner side of the connecting sleeve, so that the central shaft drives the sealing block to move into the inner side of the grouting hole through the support shell, the second spring and the telescopic plate, so that the sealing block can block the grouting hole, so that when the grouting pipe body is pre-embedded, the underground soil can be prevented from moving into the inner side of the grouting pipe body through the grouting hole and causing blockage. After the grouting pipe body is pre-embedded, the operating rod is rotated so that the operating rod can drive the central shaft to rotate, so that the central shaft can drive the connecting sleeve to rotate, and move the sealing block from the inner side of the grouting hole to the inner side of the slot. The second spring can use its own elasticity to drive the sealing block to be clamped and fixed in the inner side of the slot through the telescopic plate, so as to open the grouting hole for grouting work. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the planar structure of the three-way connecting pipe of the present invention;

[0024] Figure 2 This is a schematic diagram of the planar cross-sectional structure of the enclosure structure of the present invention;

[0025] Figure 3 This is a three-dimensional structural diagram of the grouting pipe body of the present invention;

[0026] Figure 4 This is a schematic cross-sectional view of the intermediate connecting sleeve of the present invention.

[0027] Figure 5 This is a schematic diagram of the cross-sectional structure of the support shell of the present invention;

[0028] Figure 6 This is a schematic cross-sectional view of the telescopic plate structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the planar cross-sectional structure of the closed block of the present invention.

[0030] In the diagram: 1. Enclosure structure; 2. Cast-in-place waterproof concrete side wall; 3. Inner wall skin; 4. Grouting pipe body; 401. Grouting hole; 402. Clip groove; 403. Intermediate connecting sleeve; 404. Connecting hole; 405. First spring; 406. Clip piece; 407. Connecting plate; 408. Butt sleeve; 409. Central shaft; 410. Support shell; 411. Second spring; 412. Telescopic plate; 413. Sealing block; 414. Operating rod; 415. Clip groove; 5. Embedded galvanized steel pipe; 6. Waterproof layer; 7. T-connecting pipe; 8. Longitudinal construction joint; 9. Detachment trench. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] like Figures 1-7 As shown, the pre-embedded grouting pipe for three-stage grouting and leak sealing in underground stations according to the present invention includes a building structure, on which multiple sets of grouting pipe bodies 4 are provided, and also includes a docking mechanism and an anti-blocking mechanism. In a set of grouting pipe bodies 4, a docking mechanism is provided between every two grouting pipe bodies 4. The docking mechanism includes a connecting component provided between the two grouting pipe bodies 4, and a snap-fit ​​component is provided between the two grouting pipe bodies 4 and the connecting component. An anti-blocking mechanism is provided between each set of grouting pipe bodies 4 and the connecting component. The anti-blocking mechanism includes a support component provided on the connecting component. The structure includes an elastic component and a building structure comprising an enclosure structure 1 and a cast-in-place waterproof concrete side wall 2. The cast-in-place waterproof concrete side wall 2 is provided with a side wall inner skin 3. Multiple tee connecting pipes 7 are fixedly installed on the grouting pipe body 4. Each tee connecting pipe 7 is fixedly installed with a pre-embedded galvanized steel pipe 5. A waterproof layer 6 is provided between the cast-in-place waterproof concrete side wall 2 and the grouting pipe body 4. A longitudinal construction joint 8 is provided on one side of the grouting pipe body 4. Multiple wall-separation trenches 9 adapted to the grouting pipes are provided on the cast-in-place waterproof concrete side wall 2. Multiple grouting holes 401 are opened on each grouting pipe body 4.

[0033] Specifically, the retaining structure 1 is a diaphragm wall, and a longitudinal construction joint 8 is provided on one side of the grouting pipe 4. The cast-in-place waterproof concrete side wall 2 is also provided with a wall-separation trench 9 adapted to the grouting pipe for collecting seepage water.

[0034] By using pre-embedded pipes with larger inner diameters, the flow cross-section of the grouting channel is effectively increased, reducing the flow resistance inside the pipe. This allows the grouting pressure to be fully transmitted to the voids behind the structure, avoiding problems such as low grouting efficiency and insufficient grout diffusion caused by excessively small pipe diameters. Simultaneously, combined with a three-stage grouting process, it enables comprehensive, full-cycle, and targeted systemic treatment of water leakage in underground station structures, significantly improving the reliability and integrity of leak sealing. Furthermore, it has the capability for repeated grouting, allowing for precise and timely reinforcement grouting of repeatedly leaking areas, greatly reducing subsequent treatment costs.

[0035] The grouting pipe 4 is vertically arranged between the initial support and the waterproof layer 6, and is installed above the top slab on the waterproof isolation layer, below the fluidized solidified soil. The grouting pipe 4 must have multiple grouting functions and be made of PVC or rubber. A pre-embedded galvanized steel pipe 5 is used within the structure, penetrating the waterproof layer 6 of the side wall on the water-facing side, and connected to the grouting pipe 4 at the end via a T-connector 7. The backwater side is flush with the inner surface 3 of the side wall of the cast-in-place waterproof concrete structure side wall 2. A water-stop flange is installed in the middle of the grouting pipe 4, coated with anti-rust paint, and its installation location must not conflict with construction joints. When tying reinforcement bars in the structural side wall, the pre-embedded galvanized steel pipe 5 is connected to the structure via a grid pattern.

[0036] The steel reinforcement should be firmly connected. It is recommended to set at least two "well" shaped reinforcements to ensure accurate positioning and secure fixing of the main pipe. The main pipe, structural steel reinforcement, and well shaped reinforcement should be connected by spot welding. The main reinforcement or main pipe should not be burned. The back water end of the galvanized steel pipe 5 embedded in the structure can be protected with an inner plug-type protective cap before the formwork is installed to prevent cement slurry from entering the grouting pipe body 4. After the formwork is removed, the surface slurry of the protective cap should be removed in time and the protective cap should be pulled out. After grouting is completed, the hole should be cleaned to reserve conditions for secondary grouting, and the end should be sealed. The drainage blind pipe system should use DN30 double-wall corrugated drainage blind pipes, which are wrapped with non-woven fabric after drilling.

[0037] In this embodiment, the connecting assembly includes an intermediate connecting sleeve 403 that fits between two grouting pipe bodies 4. The intermediate connecting sleeve 403 has multiple sets of connecting holes 404. Each set of connecting holes 404 is connected to a first spring 405. The end of each set of first springs 405 is connected to a snap-fit ​​piece 406. The inner wall of each grouting pipe body 4 is provided with a snap-fit ​​groove 402 that matches the snap-fit ​​piece 406.

[0038] Specifically, by moving the grouting pipe body 4, the grouting pipe body 4 can squeeze the snap-fit ​​piece 406 through the snap-fit ​​groove 402. When the grouting pipe body 4 is attached to the intermediate connecting sleeve 403, the first spring 405 can use its own elasticity to drive the snap-fit ​​piece 406 to engage with the snap-fit ​​groove 402, so that the snap-fit ​​piece 406 and the snap-fit ​​groove 402 cooperate to connect the grouting pipe body 4 to the intermediate connecting sleeve 403, thereby facilitating the splicing of multiple grouting pipe bodies 4 into a group, so as to pre-embed grouting pipe bodies 4 of appropriate length according to the length of the underground station.

[0039] In this embodiment, the support assembly includes two symmetrically fixedly installed connecting plates 407 on the inner wall of the intermediate connecting sleeve 403. A mating sleeve 408 is rotatably installed between the two connecting plates 407 via a bearing. A central shaft 409 is damped and slidably installed on the inner side of the mating sleeve 408. An operating rod 414 is welded to one side of the central shaft 409 at the far end. The elastic assembly includes multiple support shells 410 fixedly installed on the central shaft 409. Multiple second springs 411 are connected to the inner wall of each support shell 410. The ends of the multiple second springs 411 are connected to a telescopic plate 412 that is slidably connected to the support shell 410. Multiple sealing blocks 413 that are adapted to the grouting hole 401 are fixedly installed on the telescopic plate 412. A slot 415 adapted to the sealing block 413 is opened on the inner wall of each grouting pipe 4.

[0040] Specifically, after the grouting pipe body 4 is connected to the intermediate connecting sleeve 403, the central shaft 409 is inserted into the inner side of the connecting sleeve 408. This allows the central shaft 409 to drive the sealing block 413 into the inner side of the grouting hole 401 via the support shell 410, the second spring 411, and the telescopic plate 412. This allows the sealing block 413 to block the grouting hole 401, preventing underground soil from entering the inner side of the grouting pipe body 4 through the grouting hole 401 and causing blockage during pre-embedding. After the grouting pipe body 4 is pre-embedded, the operating rod 414 is rotated so that the operating rod 414 can drive the central shaft 409 to rotate, and the central shaft 409 can drive the docking sleeve 408 to rotate, so that the sealing block 413 is moved from the inside of the grouting hole 401 to the inside of the slot 415. The second spring 411 can use its own elastic force to drive the sealing block 413 to be locked and fixed in the inside of the slot 415 through the telescopic plate 412, so as to open the grouting hole 401 for grouting.

[0041] Working principle: By moving the grouting pipe body 4, the grouting pipe body 4 can press the snap-fit ​​piece 406 through the snap-fit ​​groove 402. When the grouting pipe body 4 is attached to the intermediate connecting sleeve 403, the first spring 405 can use its own elasticity to drive the snap-fit ​​piece 406 to engage with the snap-fit ​​groove 402, so that the snap-fit ​​piece 406 and the snap-fit ​​groove 402 cooperate to connect the grouting pipe body 4 to the intermediate connecting sleeve 403, thereby facilitating the splicing of multiple grouting pipe bodies 4 into a group, so as to pre-embed grouting pipe bodies 4 of appropriate length according to the length of the underground station; after the grouting pipe body 4 is connected to the intermediate connecting sleeve 403, the central shaft 409 is inserted into the inner side of the docking sleeve 408, so that the central shaft 409 passes through the support shell 410, the second spring 411 and the telescopic plate 412. The sealing block 413 is moved into the inner side of the grouting hole 401, so that the sealing block 413 can block the grouting hole 401. This prevents underground soil from moving into the inner side of the grouting pipe body 4 and causing blockage when the grouting pipe body 4 is pre-embedded. After the grouting pipe body 4 is pre-embedded, the operating rod 414 is rotated, which drives the central shaft 409 to rotate. The central shaft 409 drives the docking sleeve 408 to rotate, moving the sealing block 413 from the inner side of the grouting hole 401 to the inner side of the slot 415. The second spring 411 can use its own elasticity to drive the sealing block 413 to be locked and fixed in the inner side of the slot 415 through the telescopic plate 412, so as to open the grouting hole 401 for grouting.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The descriptions in the above embodiments and specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pre-embedded grouting pipe for three-stage grouting and leak sealing in underground stations, comprising a building structure, wherein multiple sets of grouting pipe bodies (4) are provided on the building structure, characterized in that: It also includes docking mechanisms and blocking mechanisms; In a set of grouting pipe bodies (4), a docking mechanism is provided between every two grouting pipe bodies (4). The docking mechanism includes a connecting component provided between the two grouting pipe bodies (4), and a snap-fit ​​component is provided between the two grouting pipe bodies (4) and the connecting component. Each group of grouting pipes (4) and connecting components is provided with an anti-blocking mechanism, which includes a support component on the connecting component and an elastic component.

2. The pre-embedded grouting pipe for three-stage grouting and leak sealing in underground stations according to claim 1, characterized in that: The building structure includes an enclosure structure (1) and a cast-in-place waterproof concrete side wall (2). The cast-in-place waterproof concrete side wall (2) is provided with a side wall inner skin (3). Multiple tee connecting pipes (7) are fixedly installed on the grouting pipe body (4). Each tee connecting pipe (7) is fixedly installed with a pre-embedded galvanized steel pipe (5). A waterproof layer (6) is provided between the cast-in-place waterproof concrete side wall (2) and the grouting pipe body (4). A longitudinal construction joint (8) is provided on one side of the grouting pipe body (4). Multiple wall-mounted trenches (9) adapted to the grouting pipe are provided on the cast-in-place waterproof concrete side wall (2).

3. The pre-embedded grouting pipe for three-stage grouting and leak sealing in underground stations according to claim 2, characterized in that: Each of the grouting pipes (4) is provided with multiple grouting holes (401).

4. The pre-embedded grouting pipe for three-stage grouting and leak sealing in underground stations according to claim 3, characterized in that: The connecting assembly includes an intermediate connecting sleeve (403) that fits between two grouting pipe bodies (4), and the intermediate connecting sleeve (403) has multiple sets of connecting holes (404).

5. The pre-embedded grouting pipe for three-stage grouting and leak sealing in underground stations according to claim 4, characterized in that: Each of the connecting holes (404) is connected to a first spring (405), and the end of each of the first springs (405) is connected to a snap-fit ​​tab (406).

6. A pre-embedded grouting pipe for three-stage grouting and leak sealing in underground stations according to any one of claims 1-5, characterized in that: Each of the grouting pipe bodies (4) has a snap-fit ​​groove (402) on its inner wall that is adapted to the snap-fit ​​piece (406).

7. The pre-embedded grouting pipe for three-stage grouting and leak sealing in underground stations according to claim 4, characterized in that: The support assembly includes two symmetrically fixed connecting plates (407) installed on the inner wall of the intermediate connecting sleeve (403). A mating sleeve (408) is rotatably installed between the two connecting plates (407) via a bearing. A central shaft (409) is damped and slidably installed on the inner side of the mating sleeve (408). An operating rod (414) is welded to one side of the central shaft (409) at the far end.

8. The pre-embedded grouting pipe for three-stage grouting and leak sealing in underground stations according to claim 7, characterized in that: The elastic component includes multiple support shells (410) fixedly mounted on the central shaft (409). Each support shell (410) has multiple second springs (411) connected to its inner wall. The ends of the multiple second springs (411) are connected to a telescopic plate (412) that is slidably connected to the support shell (410). Multiple sealing blocks (413) that are adapted to the grouting holes (401) are fixedly mounted on the telescopic plate (412).

9. A pre-embedded grouting pipe for three-stage grouting and leak sealing in underground stations according to claim 8, characterized in that: Each of the grouting pipe bodies (4) has a groove (415) on its inner wall that is compatible with the sealing block (413).

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