A diaphragm wall joint rigid waterstop device

Abstract

The application discloses a diaphragm wall joint rigid water stop device and belongs to the technical field of water stop devices. The device comprises a plurality of wall bodies, connecting devices arranged between adjacent wall bodies, a connecting box, two sliding plates slidably connected to the inside of the connecting box in opposite directions, and T-shaped insertion plates arranged at the ends of the sliding plates away from each other and extending out of the connecting box. A sealing air bag one is arranged at the bottom of the connecting box, a sealing air bag two is arranged at the bottom of the T-shaped insertion plate, and an inflation member is arranged on the connecting box and connected with the sealing air bag one and the sealing air bag two. The sliding cooperation of the sliding plates and the T-shaped insertion plates in the connecting box can flexibly adjust the overall width of the connecting device, the rigid component does not need to be customized for specific slots, and the abutment of adjacent wall bodies can be ensured without obvious gaps, so that the basic formation condition of the water seepage channel is blocked.

Description

Technical Field

[0001] This invention relates to a rigid water-stopping device for a diaphragm wall joint, belonging to the technical field of water-stopping devices. Background Technology

[0002] Underground diaphragm walls are generally constructed using trenching machinery. Under the condition of mud slurry wall protection, trenches are excavated section by section along the perimeter axis of the deep foundation pit project. After cleaning the trench, a steel cage is suspended in the trench, and then underwater concrete is poured using the tremie method to form a unit trench section. The construction is carried out section by section to build a continuous reinforced concrete wall underground, which serves as a water interception, seepage prevention, load-bearing, and water-retaining structure.

[0003] However, in rigid water-stopping technology, solutions such as steel plate joints, I-beam joints, and water-stopping plates with interlocking pipes attempt to block water seepage in the grooves through the rigid contact of metal components. However, they still rely on the tight fit between the components and the inner wall of the groove. Since the distance between the grooves of two adjacent continuous walls is uncertain, the processing precision of the rigid components is difficult to match the actual gap size. When adjacent wall panels are joined, tiny gaps can still become seepage channels, thereby reducing the practicality and reliability of the device.

[0004] Therefore, a new solution is needed to address this problem. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a rigid water-stopping device for diaphragm wall joints. It solves the problem that when the existing technology blocks water seepage through the rigid contact of metal components, the distance between the grooves of two adjacent continuous walls is uncertain, and the processing accuracy of the rigid components is difficult to match the actual gap size, which leads to the problem that small gaps can still become water seepage channels when adjacent wall panels are joined.

[0006] The technical problem to be solved by the present invention is achieved by the following technical solution: a rigid water-stopping device for a diaphragm wall joint, comprising a plurality of walls, wherein a connecting device is provided between adjacent walls, the connecting device comprising: Connection box, Two sliding plates are slidably connected inside the connecting box in opposite directions, and each end of the sliding plate has a T-shaped insert plate at its far end, with one end of the T-shaped insert plate extending outside the connecting box. A first sealing airbag is located at the bottom of the connecting box. The second sealing airbag is located at the bottom of the T-shaped insert. An inflatable component is mounted on the connecting box and is connected to both the first and second sealing airbags. Among them, T-shaped slots for inserting T-shaped plates are provided on opposite sides of adjacent walls.

[0007] Preferably, the inflatable component includes two telescopic air pipes disposed inside the connecting box. The two telescopic air pipes are spirally coiled, and their top ends are connected to air nozzles disposed on the upper surface of the connecting box. The sliding plate has an air groove inside that communicates with the second sealing airbag. The bottom ends of the two telescopic air pipes extend into the two sliding plates respectively and communicate with the air grooves. The air nozzles are connected to the inside of the first sealing airbag through several air delivery hoses.

[0008] Preferably, the inner wall of the T-shaped slot is provided with several positioning holes on both sides. The T-shaped insert plate is provided with a locking cavity at one end near the T-shaped slot. Several guide rods are provided in the locking cavity. A movable plate is slidably connected to the outer side of the guide rods along the axial direction. The movable plate abuts against the inner wall of the locking cavity. A wedge block is provided on one side of the movable plate. A positioning pin is provided on the other side in the same direction as the wedge block. One end of the wedge block and the positioning pin protrudes outside the T-shaped insert plate. The positioning pin is used to engage with the positioning hole. A spring is sleeved on the outer side of the guide rod in the same direction as the wedge block. The two ends of the spring are fixed to the movable plate and the inner wall of the locking cavity, respectively. A sleeve for driving the wedge block to slide is also sleeved on the outside of the T-shaped insert plate.

[0009] Preferably, the socket includes a retaining plate that fits onto the outside of the T-shaped insert plate. Pressing cavities are provided on both sides of the retaining plate. A movable plate is slidably connected inside each pressing cavity. Several push plates are provided on the side of the movable plate facing the wedge block. Several slots are provided on the inner wall of the pressing cavity for the push plates and the wedge block to engage. Several connecting rods are provided on the side of the movable plate away from the wedge block. Each connecting rod extends out of the retaining plate and is fixedly connected to a pressing plate. A spring is also fitted onto one end of each connecting rod extending out of the retaining plate.

[0010] Preferably, the card plate is provided with sealing gaskets on both sides and the bottom away from the connecting box.

[0011] Preferably, a plurality of guide rods are provided on both sides inside the connecting box, and the sliding plate abuts against the inner wall of the connecting box and is sleeved on the plurality of guide rods.

[0012] Preferably, a limit plate is provided on the opposite surfaces of the two sliding plates.

[0013] Preferably, the top of the card plate is adapted to the insertion contour of the T-shaped slot.

[0014] The beneficial effects of this invention are: 1. This invention allows for flexible adjustment of the overall width of the connecting device through the sliding fit between the sliding plate and the T-shaped insert plate inside the connecting box. It eliminates the need for custom-made rigid components for specific grooves, ensuring no obvious gaps when adjacent wall panels are joined, thus blocking the basic conditions for the formation of seepage channels. At the same time, the synergistic effect of the guide rod and the limiting plate ensures the stability of the sliding plate during sliding, preventing the T-shaped insert plate from shifting or misaligning, and also limits the range of motion of the sliding plate to prevent excessive sliding from damaging the telescopic air pipe, further ensuring the reliability of the fitting process. 2. This invention uses a unidirectional air inflator. The gas enters the first and second sealing airbags respectively through the air delivery hose, telescopic air pipe, and air groove. After the first and second sealing airbags expand, they fit tightly against the gap between the bottom of the connecting device and the bottom of the groove, sealing the seepage path below the groove and preventing water penetration. At the same time, the sealing gasket embedded in the card plate fits tightly against the wall surface after the card plate is fixed, which can not only prevent water from leaking outwards by bypassing the connection between the T-shaped insert and the slot, but also make up for the contact gap between the card plate and the wall, thereby greatly improving the reliability of water sealing and effectively reducing the risk of leakage. 3. When the card plate is inserted into the outside of the T-shaped insert plate, the wedge block automatically engages into the slot of the card plate, simultaneously driving the positioning pin to insert into the positioning hole. The T-shaped insert plate can be fixed to the wall without additional tools. The operation is simple and the locking is firm, avoiding the complicated processes of welding and bolt tightening required for traditional rigid components, which significantly improves construction efficiency. When the device needs to be replaced or recycled later, simply press the pressing plate on the card plate at the same time, and the wedge block can be released by the push plate, causing the positioning pin to disengage from the positioning hole. Then the connecting device can be taken out, realizing the complete recycling and reuse of the connecting device and reducing the cost of engineering consumables. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the wall of the present invention; Figure 3 This is a half-sectional view of the connecting box of the present invention; Figure 4 This is a half-sectional view of the T-shaped insert of the present invention; Figure 5 This is a half-sectional view of the card plate and T-shaped insert plate of the present invention connected; Figure 6 This is a half-sectional view of the card plate and sealing gasket of the present invention; Figure 7 This is the present invention. Figure 5 A magnified structural diagram of point A in the middle.

[0016] In the diagram: 1. Wall; 2. Connecting device; 3. T-shaped slot; 201. Connecting box; 202. Sealing airbag one; 203. Sliding plate; 204. T-shaped insert plate; 205. Sealing airbag two; 206. Air nozzle; 207. Telescopic air tube; 208. Air groove; 209. Positioning hole; 210. Engaging cavity; 211. Guide rod one; 212. Movable plate; 213. Locking plate; 214. Locking groove; 215. Wedge block; 216. Positioning pin; 217. Guide rod two; 218. Pressing cavity; 219. Moving plate; 220. Push plate; 221. Connecting rod; 222. Pressing plate; 223. Spring one; 224. Spring two; 225. Sealing gasket; 226. Limiting plate; 227. Air supply hose. Detailed Implementation

[0017] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this invention, the invention will be further described below in conjunction with specific illustrations.

[0018] like Figure 1-3 As shown, a rigid water-stopping device for a diaphragm wall joint includes several walls 1, and a connecting device 2 is provided between adjacent walls 1. The connecting device 2 includes: Connecting box 201 is hollow inside and has an opening at the bottom. Two sliding plates 203 are slidably connected inside the connecting box 201 in opposite directions, and each end of the sliding plate 203 is provided with a T-shaped insert 204 at its far end, with one end of the T-shaped insert 204 extending outside the connecting box 201. The sealing airbag 202 is fixed to the bottom of the connecting box 201. The sealing airbag 205 is fixed to the bottom of the T-shaped insert 204. An inflatable component is mounted on the connecting box 201 and is connected to the first sealing airbag 202 and the second sealing airbag 205. Among them, T-shaped slots 3 for inserting T-shaped plates 204 are provided on opposite sides of adjacent walls 1.

[0019] Specifically, such as Figure 3 and Figure 4 As shown, the inflation component includes two telescopic air tubes 207 suspended inside the connecting box 201. The two telescopic air tubes 207 are spirally coiled, and their top ends are connected to air nozzles 206 fixed to the upper surface of the connecting box 201. It should be noted that a sealing element (not shown in the figure) is provided at the port of the air nozzle 206. The sealing element is a conventional rubber sealing plug. When it is no longer necessary to inflate the air nozzle 206, the air nozzle 206 can be sealed by the rubber sealing plug.

[0020] In addition, the sliding plate 203 has an air groove 208 that communicates with the second sealing airbag 205. The bottom ends of the two telescopic air pipes 207 extend into the two sliding plates 203 respectively and are connected to the air groove 208. The air nozzle 206 is also connected to the inside of the first sealing airbag 202 through several air supply hoses 227.

[0021] Place the connecting box 201 in the gap between the two walls 1, push the sliding plates 203 on both sides to extend the T-shaped insert 204, so that the T-shaped insert 204 fits into the T-shaped slots 3 of the two walls 1. Adjust the overall width of the connecting device 2 by sliding and extending the sliding plates 203 to meet the installation requirements of different sized gaps between the two walls 1. Then, inflate the device 201 unidirectionally through the air nozzle 206. Part of the gas enters the first sealing airbag 202 through the two air supply hoses 227 to inflate it, and the other part enters the air groove 208 of the sliding plate 203 through the telescopic air pipe 207, and then flows into the second sealing airbag 202. 5. The expanded sealing airbag 202 and sealing airbag 205 tightly fit the gap between the connecting device 2 and the installation point, respectively, thus sealing the gap. The telescopic design of the connecting device 2 can flexibly adapt to the installation gap between walls 1 of different widths, without the need for customization for specific gaps, reducing the difficulty of construction adaptation. Moreover, the airbag expansion and sealing under the one-way control of the air nozzle 206 can quickly fill the irregular space in the gap. Compared with traditional rigid components, it reduces the fitting gap, improves construction efficiency, avoids the sealing failure problem caused by mud and sand residue, and enhances the reliability of water stop.

[0022] like Figure 2 , 4 As shown in Figures 5 and 7, several positioning holes 209 are provided on both sides of the inner wall of the T-shaped slot 3. A locking cavity 210 is provided inside the end of the T-shaped insert plate 204 near the T-shaped slot 3. Several guide rods 211 are fixed inside the locking cavity 210. A movable plate 212 is slidably connected to the outer side of the guide rods 211 along the axial direction. The movable plate 212 abuts against the inner wall of the locking cavity 210, so that the movable plate 212 can slide along the axial direction of the guide rods 211 without deflection.

[0023] A wedge block 215 is provided on one side of the movable plate 212. The wedge block 215 has a triangular cross section and an inclined surface at the top. A positioning pin 216 is provided on the other side of the movable plate 212 in the same direction as the wedge block 215. Both the wedge block 215 and the positioning pin 216 protrude from the outside of the T-shaped insert plate 204 at one end. The positioning pin 216 is used to engage with the positioning hole 209. A guide rod 211 is located on the outside of the wedge block 215 in the same direction and a spring 224 is sleeved on it. The two ends of the spring 224 are fixed to the inner wall of the movable plate 212 and the engagement cavity 210, respectively. A sleeve for driving the wedge block 215 to slide is also sleeved on the outside of the T-shaped insert plate 204.

[0024] Specifically, such as Figure 5and 6 As shown, the socket includes a card plate 213 that is sleeved on the outside of the T-shaped insert 204. It should be noted that the top of the card plate 213 is adapted to the insertion contour of the T-shaped slot 3, that is, the top shape of the card plate 213 is adapted to the shape of the T-shaped insert 204.

[0025] Both sides of the card plate 213 are provided with pressing cavities 218. Inside the pressing cavity 218, a movable plate 219 is slidably connected in the direction toward the T-shaped insert plate 204. On the side of the movable plate 219 facing the wedge block 215, several push plates 220 are provided. Several slots 214 for the push plates 220 and the wedge block 215 to be inserted are provided on the inner wall of the pressing cavity 218. Several connecting rods 221 are provided on the side of the movable plate 219 away from the wedge block 215. Several connecting rods 221 extend out of the outside of the card plate 213 and are fixedly connected to the pressing plate 222. A spring 223 is also sleeved on one end of the connecting rod 221 that extends out of the outside of the card plate 213. The two ends of the spring 223 are fixed to the pressing plate 222 and the outer wall of the card plate 213, respectively.

[0026] After the T-shaped inserts 204 on both sides are respectively inserted into the T-shaped slots 3 of the two walls 1, the locking plate 213 is fitted onto the outside of the T-shaped inserts 204 from top to bottom. During the insertion process, the locking plate 213 presses against the inclined surface of the wedge block 215 in the slot 214, causing the wedge block 215 to be forced to slide the movable plate 212 along the guide rod 211 into the engagement cavity 210. At this time, the spring 224 is stretched, and the positioning pin 216 simultaneously disengages from the positioning hole 209. After the locking plate 213 is inserted into place, the spring 224 releases its elastic potential energy, pushing the movable plate 212 to reset, causing the wedge block 215 to engage with the slot 214. Inside, the card plate 213 is fixed. At the same time, when the movable plate 212 is reset, it drives the positioning pin 216 to move synchronously, so that the positioning pin 216 is inserted into the positioning hole 209 of the T-shaped slot 3, thus completing the fixation of the T-shaped insert 204 to the wall 1. Then, the wedge block 215 is automatically engaged with the card slot 214 by the spring 224. The card plate 213 can be fixed without additional tools, which is convenient to operate. The cooperation between the positioning pin 216 and the positioning hole 209 can limit the displacement of the T-shaped insert 204, prevent it from loosening under the action of water and soil pressure, enhance the connection stability between the connecting device 2 and the wall 1, and further ensure the water-stopping effect.

[0027] Furthermore, when the connecting box 201 needs to be replaced or recycled, the two pressing plates 222 on both sides of the card plate 213 are pressed simultaneously. The pressing plates 222 drive the connecting rod 221 to move into the pressing cavity 218. At this time, the first spring 223 is compressed, and the connecting rod 221 pushes the moving plate 219 to slide in the pressing cavity 218. The moving plate 219 drives the push plate 220 to move synchronously, so that the push plate 220 extends into the slot 214 and squeezes the wedge block 215. This forces the wedge block 215 to drive the movable plate 212 to slide along the guide rod 211 into the engaging cavity 210. The second spring 224 is stretched, and the positioning pin 216 moves with the movable plate 212 to disengage from the positioning hole 209. The engaging state of the wedge block 215 and the slot 214 is released, and the locking of the card plate 213 can be released.

[0028] Then, the card plate 213 can be removed from bottom to top, which can control the T-shaped insert plate 204 to disengage from the T-shaped slot 3, completing the replacement or recycling of the connecting device 2. It can be quickly unlocked by pressing the pressing plate 222 simultaneously. No complicated tools are needed, making the operation simple and efficient. It is especially suitable for narrow working spaces in underground engineering. At the same time, it can achieve complete recycling and reuse of the connecting device 2, reducing the cost of engineering consumables and avoiding the waste caused by the one-time use of traditional water-stop components. Moreover, the disassembly process will not damage the wall 1 and the T-shaped slot 3, reducing the difficulty of later engineering maintenance.

[0029] like Figure 6 As shown, sealing gaskets 225 are provided on both sides and the bottom of the card plate 213 away from the connecting box 201.

[0030] After the card plate 213 is installed and fixed, the opposite sides of the sealing gasket 225 are tightly attached to the two walls 1. By filling the tiny gaps on the contact surface between the card plate 213 and the wall 1 with the sealing gasket 225, the water flow that may seep outward from the connection between the T-shaped insert 204 and the T-shaped slot 3 is blocked, preventing water flow from bypassing the sealing airbag 205 and leaking along the contact surface between the card plate 213 and the wall 1. This further improves the water-stopping reliability of the entire device and avoids leakage problems caused by the failure of a single sealing structure.

[0031] like Figure 3 As shown, several guide rods 217 are provided on both sides inside the connecting box 201. The sliding plate 203 abuts against the inner wall of the connecting box 201 and is sleeved on the several guide rods 217. Limiting plates 226 are provided on the opposite surfaces of the two sliding plates 203.

[0032] Two guide rods 217 provide precise guidance for the sliding plate 203, preventing it from shifting or tilting when the sliding plate 203 moves the T-shaped insert 204 for adjustment. This ensures the T-shaped insert 204 is always precisely aligned with the T-shaped slot 3 of the wall 1, significantly improving the stability of the sliding plate 203. Simultaneously, multiple limiting plates 226 effectively limit the range of motion of the two sliding plates 203, preventing damage to the telescopic air pipe 207 due to excessive sliding. This further ensures the structural stability and service life of the device during adjustment to fit different wall 1 gaps, and avoids affecting the water-stopping effect due to uncontrolled sliding components. The basic principles, main features, and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. Various changes and modifications can be made without departing from the spirit and scope of the invention, 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 rigid water-stopping device for a diaphragm wall joint, comprising several walls (1), characterized in that: A connecting device (2) is provided between adjacent walls (1), the connecting device (2) comprising: Connection box (201) Two sliding plates (203) are slidably connected inside the connecting box (201) in opposite directions, and each end of the sliding plate (204) is provided with a T-shaped insert (204) at its far end, with one end of the T-shaped insert (204) extending outside the connecting box (201). A sealing airbag (202) is disposed at the bottom of the connecting box (201). Sealing airbag two (205) is disposed at the bottom of the T-shaped insert (204). An inflatable component is mounted on the connecting box (201) and is connected to the first sealing airbag (202) and the second sealing airbag (205); Among them, T-shaped slots (3) for inserting T-shaped inserts (204) are provided on opposite sides of adjacent walls (1). The inflatable component includes two telescopic air pipes (207) disposed inside the connecting box (201). The two telescopic air pipes (207) are spirally coiled, and their top ends are connected to air nozzles (206) disposed on the upper surface of the connecting box (201). The sliding plate (203) has an air groove (208) that communicates with the second sealing airbag (205). The bottom ends of the two telescopic air pipes (207) extend into the two sliding plates (203) respectively and communicate with the air grooves (208). The air nozzles (206) are connected to the inside of the first sealing airbag (202) through several air supply hoses (227). The T-shaped slot (3) has several positioning holes (209) on both sides of its inner wall. The T-shaped insert plate (204) has a locking cavity (210) at one end near the T-shaped slot (3). The locking cavity (210) is provided with several guide rods (211). A movable plate (212) is slidably connected to the outer side of the guide rods (211) along the axial direction. The movable plate (212) abuts against the inner wall of the locking cavity (210). A wedge block (215) is provided on one side of the movable plate (212). The other side is in the same direction as the wedge block (215). A positioning pin (216) is provided on the side. Both the wedge block (215) and the positioning pin (216) protrude from the outside of the T-shaped insert plate (204) at one end. The positioning pin (216) is used to be inserted into the positioning hole (209). The guide rod (211) is located on the outside of the wedge block (215) in the same direction and is fitted with a spring (224). The two ends of the spring (224) are fixed to the inner wall of the movable plate (212) and the engagement cavity (210) respectively. The T-shaped insert plate (204) is also fitted with a sleeve for driving the wedge block (215) to slide. The socket includes a retaining plate (213) sleeved on the outside of the T-shaped insert (204). Both sides of the retaining plate (213) are provided with pressing cavities (218). A movable plate (219) is slidably connected inside the pressing cavity (218). Several push plates (220) are provided on the side of the movable plate (219) facing the wedge block (215). Several slots (214) for the push plates (220) and the wedge block (215) to be inserted are provided on the inner wall of the pressing cavity (218). Several connecting rods (221) are provided on the side of the movable plate (219) away from the wedge block (215). Several connecting rods (221) extend out of the retaining plate (213) and are fixedly connected to the pressing plate (222). A spring (223) is also sleeved on one end of the connecting rod (221) extending out of the retaining plate (213). Sealing gaskets (225) are provided on both sides and the bottom of the card plate (213) away from the connecting box (201).

2. The rigid water-stopping device for a diaphragm wall joint according to claim 1, characterized in that: The connecting box (201) has several guide rods (217) on both sides inside. The sliding plate (203) abuts against the inner wall of the connecting box (201) and is sleeved on the guide rods (217).

3. A rigid water-stopping device for a diaphragm wall joint according to claim 1, characterized in that: Limiting plates (226) are provided on the opposite surfaces of the two sliding plates (203).

4. A rigid water-stopping device for a diaphragm wall joint according to claim 1, characterized in that: The top of the card plate (213) is adapted to the insertion profile of the T-shaped slot (3).

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