Cover-excavation top-down side wall construction joint waterproof structure
By using water-swellable sealant and grouting pipe system in the construction joints of the cut-and-cover method, the problem of weld gaps was solved, resulting in better waterproofing and connection strength.
Patent Information
- Application Number
- CN202520180086.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-02-05
AI Technical Summary
Existing waterproofing structures cannot effectively avoid welded gaps in the construction joints of the cut-and-cover method, resulting in a reduction in waterproofing effectiveness.
Water-swellable sealant is used to fill the gaps, and cement grout is evenly injected through three sets of grouting pipes to fill the small gaps and enhance the connection strength.
It improves the waterproofing effect of construction joints, prevents water from seeping into the building interior, and enhances the connection strength between the first and second side walls.
Smart Images
Figure CN223838325U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waterproofing technology for construction joints in side walls, specifically a waterproofing structure for construction joints in top-cut reverse side walls. Background Technology
[0002] The construction joint in the lower sidewall of the structural slab during the cut-and-cover reverse construction method is a product of this method. First, the top slab is constructed. During top slab construction, a section of structural sidewall must be built. Then, the lower section is constructed. After the bottom slab is completed, the structural sidewall must be built from the lower layer to the upper layer. To distinguish it from the sidewall constructed along with the top slab, it is called the underground sidewall. Although both are underground structural sidewalls, their construction times differ, resulting in this construction joint.
[0003] Construction joints are generated during the construction of side walls. To prevent moisture from seeping into the building through these joints, waterproof structures need to be pre-embedded during the construction of both side walls. However, existing waterproof structures typically involve pre-embedding water-stop steel plates and then welding them on both sides. It is difficult to observe the back side during welding, resulting in incomplete welding of the back side and gaps in the water-stop steel plates, which reduces the waterproofing effect. To address these issues, the inventors propose a waterproof structure for construction joints in side walls constructed using a cut-and-cover method. Utility Model Content
[0004] To address the problem that it is difficult to evenly fill construction joints by delivering cement grout through a set of grouting pipes, the purpose of this utility model is to provide a waterproof structure for construction joints in cut-and-cover reverse sidewalls.
[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a waterproof structure for construction joints of a cut-and-cover reverse-construction sidewall, including a first sidewall and a second sidewall. The first sidewall is located above the second sidewall. A construction joint is provided at the connection between the first sidewall and the second sidewall. A first embedded plate is pre-embedded in the first sidewall, and a second embedded plate is pre-embedded in the second sidewall. A water-stop steel plate is provided between the first and second embedded plates. The upper and lower sides of the water-stop steel plate are located within the first and second embedded plates. Splicing plates are fixed at both ends of the water-stop steel plate. The two splicing plates are slidably disposed within the first and second embedded plates, respectively. Water-swellable waterproof sealant is provided on one side of each of the two splicing plates. When the first sidewall is first poured, a first groove is pre-reserved in the first sidewall, and the first... The pre-embedded plate is embedded in the first groove. Then, when the second side wall is poured, the second groove is reserved, and the delivery pipe, the first grouting pipe and the second grouting pipe are pre-embedded. The second pre-embedded plate is then embedded in the second groove. The water-stop steel plate is then fixedly connected to the splicing plate, and the splicing plate is inserted into the first splicing groove and the second splicing groove. Thus, the upper and lower ends of the water-stop steel plate are in the first and second pre-embedded plates. At this time, there is a gap between the splicing plate and the first and second splicing grooves. Then, water-swellable sealant is injected into the gap. When water seeps into the construction joint, the water-swellable sealant expands when it comes into contact with water, sealing the first and second splicing grooves. At the same time, the water-stop steel plate blocks the seeping water, thus avoiding gaps in the water-stop steel plate and preventing water from seeping into the building from the construction joint, thereby improving the waterproofing effect.
[0006] Then, the connecting pipe is inserted into the delivery pipe, thus connecting the delivery pipe and the connecting pipe. A pressure grouting machine is connected to the feed pipe to deliver cement grout to the distribution pipe. The distribution pipe then distributes the grout to the three sleeves, and simultaneously delivers it from the three connecting pipes to the three delivery pipes. This allows the first and second grouting pipes to inject cement grout into the construction joint. The three sets of first and second grouting pipes can evenly deliver cement grout into the construction joint. After the cement grout solidifies, it fills the small gaps in the construction joint, making the connection between the first and second side walls more secure and improving the waterproofing effect of the construction joint. By rotating the connecting pipe, the collar rotates in the annular groove, and the threaded part rotates out of the threaded groove, disengaging it from the delivery pipe, thus facilitating the disassembly of the distribution pipe, sleeves, and connecting pipes.
[0007] Preferably, a conveying pipe is fixedly installed inside the second side wall, and a first grouting pipe and a second grouting pipe are fixedly installed on the outer surface of the conveying pipe. A connecting pipe is internally threaded into one end of the conveying pipe. A diversion pipe is provided on one side of the second side wall, and a feed pipe is fixedly installed on one side of the diversion pipe. A sleeve is fixedly installed on the outer surface of the diversion pipe, and the connecting pipe is rotatably inserted into the sleeve. A threaded groove is opened inside the conveying pipe, and a threaded part is fixedly installed on the outer surface of the connecting pipe. The threaded part is threaded into the threaded groove. An annular groove is opened inside the sleeve. A collar is fixedly fitted on the outer surface of the connecting pipe. The collar is rotatably installed in the annular groove. A sealing ring is fixedly fitted on the outer surface of the connecting pipe, and the sealing ring is attached to one side of the conveying pipe.
[0008] Preferably, a first groove is formed in the first side wall, and the first embedded plate is fixedly installed in the first groove. A second groove is formed in the second side wall, and the second embedded plate is fixedly installed in the second groove. A first splicing groove is formed in the first embedded plate, and a second splicing groove is formed in the second embedded plate. The two splicing plates slide in the first splicing groove and the second splicing groove, respectively.
[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0010] 1. In this utility model, the water-swellable sealant expands when it comes into contact with water during construction joint seepage, sealing the first and second splicing grooves. At the same time, the water-stop steel plate blocks the seepage of water, thereby preventing gaps in the water-stop steel plate and preventing water from seeping into the building from the construction joint, thus improving the waterproofing effect.
[0011] 2. In this utility model, the three sets of first and second grouting pipes can evenly deliver cement grout into the construction joint. After the cement grout solidifies, it can fill the small gaps at the construction joint, thereby making the connection between the first and second side walls more solid and improving the waterproofing effect of the construction joint. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0014] Figure 2 This is a schematic diagram of the split structure of the first side wall of this utility model;
[0015] Figure 3 This is a partial sectional view of the second side wall of this utility model.
[0016] Figure 4 This is a schematic diagram of the disassembled structure of the water-stop steel plate of this utility model;
[0017] Figure 5 This is a schematic diagram of the diversion tube structure of this utility model;
[0018] Figure 6 This is a schematic diagram of the disassembled structure of the connecting pipe of this utility model.
[0019] In the diagram: 1. First side wall; 101. First groove; 11. Second side wall; 111. Second groove; 12. Construction joint; 2. First embedded plate; 201. First splicing groove; 21. Second embedded plate; 211. Second splicing groove; 22. Water-stop steel plate; 23. Splicing plate; 24. Water-swellable sealing adhesive; 3. Conveying pipe; 301. Threaded groove; 31. First grouting pipe; 32. Second grouting pipe; 33. Diversion pipe; 34. Feed pipe; 35. Sleeve; 351. Annular groove; 36. Connecting pipe; 37. Collar; 38. Sealing ring; 39. Threaded part. Detailed Implementation
[0020] 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.
[0021] Example: Figure 1-6As shown, this utility model provides a waterproof structure for the construction joint of a cut-and-cover reverse construction side wall, including a first side wall 1 and a second side wall 11. The first side wall 1 is located above the second side wall 11. A construction joint 12 is provided at the connection between the first side wall 1 and the second side wall 11. A first embedded plate 2 is pre-embedded in the first side wall 1, and a second embedded plate 21 is pre-embedded in the second side wall 11. A water-stop steel plate 22 is provided between the first embedded plate 2 and the second embedded plate 21. The upper and lower sides of the water-stop steel plate 22 are located within the first embedded plate 2 and the second embedded plate 21. Splicing plates 23 are fixedly provided at both ends of the water-stop steel plate 22. The two splicing plates 23 are slidably disposed within the first embedded plate 2 and the second embedded plate 21, respectively. Water-swellable waterproof sealant 24 is provided on one side of each of the two splicing plates 23. When pouring the first side wall 1, a first groove 101 is pre-reserved in the first side wall 1, and the first embedded plate 2 is pre-embedded into the first groove 101. In the construction joint 12, a second groove 111 is reserved during the pouring of the second side wall 11, and the second embedded plate 21 is embedded in the second groove 111. Then, the water-stop steel plate 22 is fixedly connected to the splicing plate 23, and the splicing plate 23 is inserted into the first splicing groove 201 and the second splicing groove 211. Thus, the upper and lower ends of the water-stop steel plate 22 are in the first embedded plate 2 and the second embedded plate 21. At this time, there is a gap between the splicing plate 23 and the first splicing groove 201 and the second splicing groove 211. Then, water-swellable sealant 24 is injected into the gap. When water seeps into the construction joint 12, the water-swellable sealant 24 expands when it comes into contact with water, sealing the first splicing groove 201 and the second splicing groove 211. At the same time, the water-stop steel plate 22 blocks the seeping water, thereby preventing gaps in the water-stop steel plate 22 and preventing water from seeping into the building from the construction joint 12, thus improving the waterproofing effect.
[0022] A conveying pipe 3 is fixedly installed inside the second side wall 11. A first grouting pipe 31 and a second grouting pipe 32 are fixedly installed on the outer surface of the conveying pipe 3. A connecting pipe 36 is threaded into one end of the conveying pipe 3. A diversion pipe 33 is provided on one side of the second side wall 11. A feed pipe 34 is fixedly installed on one side of the diversion pipe 33. A sleeve 35 is fixedly installed on the outer surface of the diversion pipe 33. The connecting pipe 36 is rotatably inserted into the sleeve 35. A threaded groove 301 is opened inside the conveying pipe 3. A threaded part 39 is fixedly installed on the outer surface of the connecting pipe 36. The threaded part 39 is threaded into the threaded groove 301. An annular groove 351 is opened inside the sleeve 35. A collar 37 is fixedly fitted on the outer surface of the connecting pipe 36. The collar 37 is rotatably fitted into the annular groove 351. A sealing ring 38 is fixedly fitted on the outer surface of the connecting pipe 36. The sealing ring 38 is attached to one side of the conveying pipe 3.
[0023] By adopting the above technical solution, a pressure grouting machine is connected to the feed pipe 34 to deliver cement grout into the diversion pipe 33. The diversion pipe 33 then diverts the grout into the three sleeves 35 and simultaneously delivers it from the three connecting pipes 36 into the three conveying pipes 3. This allows the first grouting pipe 31 and the second grouting pipe 32 to inject cement grout into the construction joint 12. The three sets of first grouting pipes 31 and second grouting pipes 32 can evenly deliver cement grout into the construction joint 12. After the cement grout solidifies, it can fill the small gaps in the construction joint 12, thereby making the connection between the first side wall 1 and the second side wall 11 more secure and improving the waterproofing effect of the construction joint 12. By rotating the connecting pipe 36, the collar 37 is rotated in the annular groove 351, and the threaded part 39 is rotated out of the threaded groove 301, disengaging it from the conveying pipe 3. This facilitates the disassembly of the diversion pipe 33, sleeves 35, and connecting pipes 36.
[0024] A first groove 101 is provided in the first side wall 1, and a first embedded plate 2 is fixedly installed in the first groove 101. A second groove 111 is provided in the second side wall 11, and a second embedded plate 21 is fixedly installed in the second groove 111. A first splicing groove 201 is provided in the first embedded plate 2, and a second splicing groove 211 is provided in the second embedded plate 21. Two splicing plates 23 slide in the first splicing groove 201 and the second splicing groove 211, respectively.
[0025] By adopting the above technical solution, when pouring the second side wall 11, a delivery pipe 3, a first grouting pipe 31, and a second grouting pipe 32 are reserved. Through the first splicing groove 201 opened in the first embedded plate 2 and the second splicing groove 211 opened in the second embedded plate 21, the two splicing plates 23 are respectively spliced in the first splicing groove 201 and the second splicing groove 211, and the water-stop steel plate 22 is driven to be installed in the first embedded plate 2 and the second embedded plate 21, so that the water-stop steel plate 22 can block the seeping water.
[0026] Working principle: First, when pouring the first side wall 1, a first groove 101 is reserved in the first side wall 1, and a first embedded plate 2 is embedded in the first groove 101. Then, when pouring the second side wall 11, a second groove 111 is reserved, and a conveying pipe 3, a first grouting pipe 31, and a second grouting pipe 32 are embedded. A second embedded plate 21 is embedded in the second groove 111. Then, the waterstop steel plate 22 is fixedly connected to the splicing plate 23, and the splicing plate 23 is inserted into the first splicing groove 201 and the second splicing groove 211, thereby making the waterstop steel plate 22 vertically and horizontally connected. Both ends are located within the first embedded plate 2 and the second embedded plate 21. At this time, there is a gap between the splicing plate 23 and the first splicing groove 201 and the second splicing groove 211. Then, water-swellable sealant 24 is injected into the gap. When water seeps into the construction joint 12, the water-swellable sealant 24 expands upon contact with water, sealing the first splicing groove 201 and the second splicing groove 211. At the same time, the water-stop steel plate 22 blocks the seeping water, thereby preventing gaps from existing in the water-stop steel plate 22 and preventing water from seeping into the building from the construction joint 12, thus improving the waterproofing effect.
[0027] Then, the connecting pipe 36 is inserted into the conveying pipe 3, thereby connecting the conveying pipe 3 and the connecting pipe 36. A pressure grouting machine is connected to the feed pipe 34, allowing cement grout to be conveyed to the diversion pipe 33. The diversion pipe 33 then distributes the grout to the three sleeves 35, while simultaneously conveying it from the three connecting pipes 36 to the three conveying pipes 3. This allows the first grouting pipe 31 and the second grouting pipe 32 to inject cement grout into the construction joint 12. Thus, through the three sets of first grouting pipes 31 and second grouting pipes... The grout pipe 32 can evenly deliver cement grout into the construction joint 12. After the cement grout solidifies, it can fill the small gaps in the construction joint 12, thereby making the connection between the first side wall 1 and the second side wall 11 more secure and improving the waterproofing effect of the construction joint 12. By rotating the connecting pipe 36, the collar 37 is driven to rotate in the annular groove 351, and the threaded part 39 is rotated out of the threaded groove 301, so that it is separated from the delivery pipe 3, which makes it easier to disassemble the diversion pipe 33, the sleeve 35 and the connecting pipe 36.
[0028] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A waterproof structure for construction joints of cut-and-cover reverse sidewalls, comprising a first sidewall (1) and a second sidewall (11), characterized in that: The first side wall (1) is located above the second side wall (11). A construction joint (12) is provided at the connection between the first side wall (1) and the second side wall (11). A first embedded plate (2) is pre-embedded in the first side wall (1), and a second embedded plate (21) is pre-embedded in the second side wall (11). A water-stop steel plate (22) is provided between the first embedded plate (2) and the second embedded plate (21). The upper and lower sides of the water-stop steel plate (22) are located in the first embedded plate (2) and the second embedded plate (21). Splicing plates (23) are fixed at both ends of the water-stop steel plate (22). The two splicing plates (23) are slidably disposed in the first embedded plate (2) and the second embedded plate (21) respectively. Water-swellable sealing adhesive (24) is provided on one side of each of the two splicing plates (23).
2. The waterproof structure for the construction joint of the cut-and-cover reverse sidewall as described in claim 1, characterized in that, A conveying pipe (3) is fixedly installed inside the second side wall (11). A first grouting pipe (31) and a second grouting pipe (32) are fixedly installed on the outer surface of the conveying pipe (3). A connecting pipe (36) is inserted into one end of the conveying pipe (3) with an internal thread. A diversion pipe (33) is provided on one side of the second side wall (11). A feed pipe (34) is fixedly installed on one side of the diversion pipe (33). A sleeve (35) is fixedly installed on the outer surface of the diversion pipe (33). The connecting pipe (36) is rotatably inserted into the sleeve (35).
3. The waterproof structure for the construction joint of the cut-and-cover reverse sidewall as described in claim 2, characterized in that, The conveying pipe (3) has a threaded groove (301) inside, and the outer surface of the connecting pipe (36) is fixedly provided with a threaded part (39), which is threadedly inserted into the threaded groove (301).
4. The waterproof structure for the construction joint of the cut-and-cover reverse sidewall as described in claim 3, characterized in that, The sleeve (35) has an annular groove (351) inside, and the outer surface of the connecting pipe (36) is fixedly fitted with a collar (37), which is rotatably disposed in the annular groove (351).
5. A waterproof structure for the construction joint of a cut-and-cover reverse-construction sidewall as described in claim 4, characterized in that, A sealing ring (38) is fixedly sleeved on the outer surface of the connecting pipe (36), and the sealing ring (38) is attached to one side of the conveying pipe (3).
6. The waterproof structure for the construction joint of the cut-and-cover reverse sidewall as described in claim 1, characterized in that, The first side wall (1) has a first groove (101) and the first embedded plate 2 is fixedly installed in the first groove (101).
7. The waterproof structure for the construction joint of the cut-and-cover reverse sidewall as described in claim 1, characterized in that, The second side wall (11) has a second groove (111) and the second embedded plate (21) is fixedly installed in the second groove (111).
8. The waterproof structure for the construction joint of the cut-and-cover reverse sidewall as described in claim 1, characterized in that, The first embedded plate (2) has a first splicing groove (201) and the second embedded plate (21) has a second splicing groove (211). The two splicing plates (23) slide in the first splicing groove (201) and the second splicing groove (211) respectively.