Water channeling prevention grouting structure for interior of underground diaphragm wall
By designing an anti-water leakage grouting structure, the problems of water leakage and grouting system contamination during the construction of underground continuous walls were solved, achieving efficient and safe grouting construction and ensuring the quality and efficiency of subway construction.
Patent Information
- Application Number
- CN202423018063.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-09
AI Technical Summary
After the main structure of the subway station was completed, the through cracks exacerbated the water leakage. Existing sealing methods are labor-intensive and resource-intensive, and the quality is unstable. The grouting system is susceptible to moisture and impurities, which affects the construction quality and efficiency.
The grouting structure adopts an anti-water-crossing structure, including a one-way valve, air bladder, air release component, and reinforcing ribs. The air bladder seals the grouting pipe, the air release component discharges overpressure gas, the one-way valve prevents backflow, and the side wall waterproof membrane improves waterproofing, ensuring grouting accuracy and equipment lifespan.
It effectively prevents moisture and impurities from entering the grouting pipe, improves the accuracy and reliability of grouting construction, extends equipment life, reduces safety hazards, and improves construction efficiency and quality.
Smart Images
Figure CN223497172U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of subway construction technology, and in particular to a grouting structure for preventing water leakage inside a diaphragm wall. Background Technology
[0002] After the main structure of a subway station is completed, its side walls often develop through cracks due to various quality problems, leading to leakage. The leakage will gradually worsen over a period of time after the structural construction is completed. In the past, the most common way to deal with these cracks was to seal them with epoxy resin. However, due to structural settlement, rising groundwater levels, and the presence of water-transferring layers between the main structure and the retaining structure, grouting a single crack often requires completely blocking the water-transferring path to achieve a complete seal. This process wastes a lot of manpower and resources, and the quality guarantee period after sealing is short, with the possibility of re-leakage.
[0003] However, during the construction of diaphragm walls, moisture or other impurities often enter the grouting system through the grouting pipes. This not only affects the quality and accuracy of the grouting construction, but may also lead to waste of grouting materials or damage to construction equipment, thereby increasing project costs and reducing construction efficiency.
[0004] To address this issue, a grouting structure for preventing water seepage inside a diaphragm wall is proposed. Utility Model Content
[0005] To overcome the above deficiencies, this utility model provides an anti-water leakage grouting structure for the interior of underground continuous walls, which aims to improve the problems of water leakage into the grouting pipe and the accumulation of gas inside the grouting pipe that cannot be discharged after a long period of time.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a grouting structure for preventing water seepage inside a diaphragm wall, comprising a diaphragm wall and a main structure side wall, wherein a water seepage layer is fixedly connected between the diaphragm wall and the main structure side wall, wherein a vertical grouting pipe body is pre-embedded in the diaphragm wall, wherein a grouting pipe tee is fixedly connected to the bottom of the grouting pipe body, wherein a one-way valve is fixedly connected to one end of the grouting pipe tee near the main structure side wall, wherein a pipe opening rubber diaphragm is fixedly connected to the valve port of the one-way valve, wherein a sealing component is provided at the top opening of the grouting pipe body, and a venting component is provided on the outer side of the grouting pipe body extending outside the diaphragm wall;
[0007] The sealing assembly includes an airbag disposed inside the grouting pipe body. Protective rubber plates are provided on both the upper and lower sides of the airbag. An air inlet pipe is fixedly connected inside the airbag. An air pump is provided on the outside of the grouting pipe body. The output end of the air pump is fixedly connected to the end of the air inlet pipe away from the airbag.
[0008] As a further description of the above technical solution:
[0009] The venting assembly includes an extension tube, which is fixedly connected to the outside of the grouting pipe body. A piston is slidably connected inside the extension tube, and a spring is provided inside the extension tube.
[0010] As a further description of the above technical solution:
[0011] The one-way valve is reinforced by sealing it with quick-drying cement and attaching it to the underground continuous wall.
[0012] As a further description of the above technical solution:
[0013] A waterproof membrane is fixedly connected between the side wall of the main structure and the water-permeable layer.
[0014] As a further description of the above technical solution:
[0015] The airbag is slidably connected inside the grouting pipe body, and a rubber cap is provided on the top of the grouting pipe body.
[0016] As a further description of the above technical solution:
[0017] One end of the spring is fixedly connected to one side of the piston, and the other end of the spring abuts against the inner wall of the extension tube.
[0018] As a further description of the above technical solution:
[0019] An air outlet pipe is fixedly connected to the outside of the extension pipe, and the main body of the grouting pipe extends out of the outer side of the underground continuous wall section and is coated with an anti-rust layer.
[0020] As a further description of the above technical solution:
[0021] The underground continuous wall and the main structure side wall are both fixedly connected with multiple reinforcing bars.
[0022] This utility model has the following beneficial effects:
[0023] 1. In this invention, an airbag is placed at the inlet of the grouting pipe. The airbag is inflated by an air pump until it is fully expanded, and then a rubber cap is placed over it. This effectively improves the airtightness of the grouting pipe, preventing moisture or other impurities from entering the pipe, thereby ensuring the accuracy and reliability of the grouting construction and extending the service life of the equipment.
[0024] 2. In this utility model, an extension pipe is fixedly installed on the outside of the grouting pipe, and an air outlet pipe is provided outside the extension pipe. When the air pressure inside the grouting pipe is too high, the air pressure will push the piston to move until the air outlet pipe is opened. Thus, excess gas can be discharged from the air outlet pipe in a timely manner, effectively preventing safety hazards caused by excessive air pressure inside the grouting pipe. Attached Figure Description
[0025] Figure 1 This is a plan view of an anti-water-channeling grouting structure for the interior of a diaphragm wall proposed in this utility model;
[0026] Figure 2 for Figure 1 Enlarged view of point A in the middle;
[0027] Figure 3 for Figure 1 Enlarged diagram of point B in the middle.
[0028] Legend:
[0029] 1. Diaphragm wall; 2. Grouting pipe body; 3. Waterproof membrane for side walls; 4. Main structure side walls; 5. Rubber membrane for pipe openings; 6. Quick-drying cement sealant; 7. Water-transfer layer; 8. Grouting pipe tee; 9. Reinforcing ribs; 10. Rubber cap; 11. Air inlet pipe; 12. Airbag; 13. Protective rubber sheet; 14. Piston; 15. Extension pipe; 16. Spring; 17. Air outlet pipe; 18. One-way valve; 19. Air pump. Detailed Implementation
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0031] Reference Figures 1-3 An embodiment of this utility model provides: a grouting structure for preventing water seepage inside a diaphragm wall, including a diaphragm wall 1 and a main structure side wall 4, a water seepage layer 7 fixedly connected between the diaphragm wall 1 and the main structure side wall 4, a vertical grouting pipe body 2 pre-embedded in the diaphragm wall 1, a grouting pipe tee 8 fixedly connected to the bottom of the grouting pipe body 2, a one-way valve 18 fixedly connected to one end of the grouting pipe tee 8 near the main structure side wall 4, a pipe opening rubber film 5 fixedly connected to the valve port of the one-way valve 18, the one-way valve 18 is reinforced with the diaphragm wall 1 by a quick-drying cement seal 6, a side wall waterproof membrane 3 fixedly connected between the main structure side wall 4 and the water seepage layer 7, multiple reinforcing ribs 9 fixedly connected inside both the diaphragm wall 1 and the main structure side wall 4, a sealing component is provided at the top pipe opening of the grouting pipe body 2, and an air venting component is provided on the outer side of the grouting pipe body 2 extending outside the diaphragm wall 1;
[0032] The sealing assembly includes an airbag 12, which is located inside the grouting pipe body 2. Protective rubber plates 13 are installed on both the upper and lower sides of the airbag 12. An air inlet pipe 11 is fixedly connected inside the airbag 12. An air pump 19 is installed on the outside of the grouting pipe body 2, with its output end fixedly connected to the end of the air inlet pipe 11 away from the airbag 12. The diaphragm wall 1 serves as the main body of the entire structure, providing stable support and seepage prevention, while also forming the construction interface for grouting and preventing water seepage. The main structure sidewall 4 serves as a supporting component for the diaphragm wall 1, supporting the main structure, forming a complete enclosure system, and providing an interface for connection with the diaphragm wall 1. A water-seepage layer 7 is filled between the diaphragm wall 1 and the main structure sidewall 4 to prevent water from seeping along the structural interface, ensuring the waterproof performance of the construction area. The grouting pipe body 2 is used to transport the grouting material to the designated location, ensuring accurate injection of the grouting material during construction to achieve the effects of filling, sealing, and waterproofing. The grouting pipe tee 8 is installed at the bottom of the grouting pipe body 2 to achieve the diversion and delivery of grouting material in different directions, thereby improving grouting efficiency and coverage. One-way valve 18
[0033] Installed on the grouting pipe tee 8, it prevents backflow of grouting material or external moisture, ensures one-way operation of the grouting system, and improves construction safety. The pipe port rubber diaphragm 5 is set at the valve port of the one-way valve 18 to enhance sealing, prevent impurities or moisture from entering the grouting system, and protect the port of the one-way valve 18 from contamination.
[0034] Quick-drying cement sealant 6 is used to reinforce the one-way valve 18 to the diaphragm wall 1, enhancing the stability of the entire grouting system and preventing loosening and damage caused by external forces or water seepage. Waterproof membrane 3 is installed between the main structure sidewall 4 and the water-permeable layer 7, further improving the waterproofing effect and preventing moisture from penetrating through the structural layers. Reinforcing ribs 9 are evenly distributed inside the diaphragm wall 1 and the main structure sidewall 4, providing additional support and compressive strength, enhancing the overall structural strength.
[0035] Reference Figure 1 and Figure 2The venting assembly includes an extension pipe 15, which is fixedly connected to the outside of the grouting pipe body 2. A piston 14 is slidably connected inside the extension pipe 15, and a spring 16 is installed inside the extension pipe 15. An air bladder 12 is slidably connected inside the grouting pipe body 2. A rubber cap 10 is installed on the top of the grouting pipe body 2. An exhaust pipe 17 is fixedly connected to the outside of the extension pipe 15. The outer side of the section of the grouting pipe body 2 extending out of the diaphragm wall is coated with an anti-rust layer. The extension pipe 15, fixedly connected to the outside of the grouting pipe body 2, extends the gas emission path and provides a channel for the piston to slide, controlling the gas emission process. The piston 14 is slidably connected inside the extension pipe 15 and is acted upon by the internal air pressure and the spring 16. When the air pressure increases, the piston 14 is pushed, opening the exhaust channel and releasing excess gas. The spring 16 is located inside the extension pipe 15 and cooperates with the piston 14. When the air pressure decreases, the spring 16 resets the piston, closing the exhaust channel and ensuring normal airtightness. The vent pipe 17 is fixed to the outside of the extension pipe 15 to discharge excess gas to the external environment, preventing excessive gas pressure from damaging the system and ensuring safety. A rubber cap 10 is installed on the top of the grouting pipe body 2 to provide an additional seal, preventing external impurities or moisture from entering the grouting pipe and protecting the integrity of the pipe opening. A rust-preventive coating is applied to the outside of the portion of the grouting pipe body 2 extending out of the diaphragm wall 1 to prevent moisture and corrosive substances in the external environment from damaging the grouting pipe and extend the equipment's service life.
[0036] Working principle: During the construction phase of the diaphragm wall 1, the grouting pipe tee 8 is positioned and installed at the bottom of the grouting pipe body 2 using hydraulic clamps, ensuring it is located on the excavation face side of the diaphragm wall 1. After installation, a short DN50 grouting pipe of approximately 14cm length is connected to the end of the grouting pipe tee 8 closest to the excavation face, and a thin steel plate with dimensions of 150mm×150mm×10mm is welded to the top of the short pipe. Simultaneously, φ14 steel bars are welded to reinforce the branch pipes of the grouting tee to prevent the reinforcing cage from twisting during hoisting and lowering.
[0037] After the construction of the diaphragm wall 1 is completed, ultrasonic testing is performed. After passing the test, the exposed portion of the grouting pipe body 2 is coated with anti-rust paint, and a rubber cap 10 is installed on top. During subsequent excavation, wedge-shaped chiseling is carried out within a 15cm radius around the grouting pipe opening, with a chiseling depth of 8-10cm, to locate the original 150mm×150mm sealing steel plate. After cutting off part of the tee grouting short pipe, the one-way valve 18 is firmly welded to the remaining short pipe using carbon dioxide gas shielded welding. After welding, a rubber diaphragm 5 is installed at the end of the one-way valve 18, and then the chiseled hole is repaired and leveled with quick-drying cement sealant 6.
[0038] Before constructing the main structure sidewall 4, a waterproof membrane 3 is laid to improve waterproofing performance. After the main structure sidewall 4 is completed and the enclosure structure has stabilized, post-grouting is performed. After grouting, the airbag 12, held by the protective rubber plate 13, is placed inside the grouting pipe body 2, and the airbag 12 is inflated by the air pump 19 until the grouting pipe opening is sealed. Subsequently, a rubber cap 10 is installed to further enhance airtightness, effectively preventing moisture or impurities from entering the grouting pipe, thereby ensuring the accuracy and reliability of the grouting construction and extending the service life of the equipment.
[0039] When gas is generated inside the grouting pipe body 2, causing excessive air pressure, the piston 14 inside the extension pipe 15 will slide under the pressure, opening the vent pipe 17 to release excess gas. When the air pressure returns to normal, the spring 16 will rebound, causing the piston 14 to reset and closing the exhaust passage, thereby avoiding safety hazards caused by excessive air pressure inside the pipe.
[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A grouting structure for preventing water seepage inside a diaphragm wall, comprising a diaphragm wall (1) and side walls of the main structure (4), characterized in that: A water-passing layer (7) is fixedly connected between the underground continuous wall (1) and the main structure side wall (4). A vertical grouting pipe body (2) is pre-embedded in the underground continuous wall (1). A grouting pipe tee (8) is fixedly connected to the bottom of the grouting pipe body (2). A one-way valve (18) is fixedly connected to one end of the grouting pipe tee (8) near the main structure side wall (4). A pipe opening rubber film (5) is fixedly connected to the valve port of the one-way valve (18). A sealing component is provided at the top pipe opening of the grouting pipe body (2). An air venting component is provided on the outer side of the grouting pipe body (2) extending out of the underground continuous wall (1). The sealing assembly includes an airbag (12), which is disposed inside the grouting pipe body (2). Protective rubber plates (13) are provided on both the upper and lower sides of the airbag (12). An air inlet pipe (11) is fixedly connected inside the airbag (12). An air pump (19) is provided on the outside of the grouting pipe body (2). The output end of the air pump (19) is fixedly connected to the end of the air inlet pipe (11) away from the airbag (12).
2. The anti-water-channeling grouting structure for the interior of a diaphragm wall according to claim 1, characterized in that: The venting assembly includes an extension tube (15), which is fixedly connected to the outside of the grouting pipe body (2). A piston (14) is slidably connected inside the extension tube (15), and a spring (16) is provided inside the extension tube (15).
3. The anti-water-channeling grouting structure for the interior of a diaphragm wall according to claim 1, characterized in that: The one-way valve (18) is reinforced with the underground continuous wall (1) by quick-drying cement sealing (6).
4. The anti-water-channeling grouting structure for the interior of a diaphragm wall according to claim 1, characterized in that: A waterproof membrane (3) is fixedly connected between the main structure side wall (4) and the water-permeable layer (7).
5. A grouting structure for preventing water seepage inside a diaphragm wall according to claim 1, characterized in that: The airbag (12) is slidably connected inside the grouting pipe body (2), and a rubber cap (10) is provided on the top of the grouting pipe body (2).
6. A grouting structure for preventing water seepage inside a diaphragm wall according to claim 2, characterized in that: One end of the spring (16) is fixedly connected to one side of the piston (14), and the other end of the spring (16) abuts against the inner wall of the extension tube (15).
7. A grouting structure for preventing water seepage inside a diaphragm wall according to claim 2, characterized in that: An air outlet pipe (17) is fixedly connected to the outside of the extension pipe (15), and the grouting pipe body (2) extends out of the outer side of the underground continuous wall (1) section and is coated with an anti-rust layer.
8. A grouting structure for preventing water seepage inside a diaphragm wall according to claim 1, characterized in that: Multiple reinforcing ribs (9) are fixedly connected inside both the underground continuous wall (1) and the main structure side wall (4).