Subway deformation joint anti-seepage structure

Abstract

The invention relates to the field of construction joint treatment, in particular to a subway deformation joint anti-seepage structure. The sealing device is used for sealing a deformation joint between two concrete members, and a water stop belt is arranged at the bottom of the deformation joint in an embedded mode. A first-stage step and a second-stage step are arranged at the ends, close to each other, of the two concrete members from top to bottom, a drainage groove is obliquely formed in the intersection of the horizontal plane of the second-stage step and the vertical plane of the first-stage step, an anti-seepage mechanism is arranged in the deformation joint, steel edges are arranged on the two sides of the anti-seepage mechanism, and a pressing plate and an oblique inserting plate are arranged at the tops and the bottoms of the steel edges correspondingly. The pressing plate is pressed on the first step, and the inclined inserting plate is inserted into the drainage groove. According to the anti-seepage structure, the four anti-seepage barriers are constructed, the anti-seepage effect is good, besides the water stop belt serving as a core anti-seepage structure needs to be embedded, other structures only need to be mutually connected through common bolts and installed in the deformation joint, dismounting and mounting are convenient, and follow-up overhauling and replacing are simpler.

Description

Technical Field

[0001] This invention relates to the field of construction joint treatment technology, and in particular to a leak-proof structure for subway expansion joints. Background Technology

[0002] During subway construction, due to the excessive length and complex shape of the structure, or factors such as geological conditions and load differences, a special type of structural joint, the expansion joint, is needed to prevent harmful cracks or damage caused by temperature changes, concrete shrinkage, uneven settlement, or seismic forces. Expansion joints require sealing to achieve water stoppage, force transmission, and adaptation to deformation. Most existing expansion joint waterproofing devices require connection to the concrete structure via expansion bolts, which makes subsequent maintenance or replacement very difficult.

[0003] Chinese patent CN220166992U discloses a waterproof construction structure for special deformation joints in subways crossing seismic fault zones. It introduces and combines various waterstops, which can perfectly solve the waterproofing problem of special deformation joints when subways cross seismic fault zones. After engineering tests, the effect is very significant.

[0004] However, the above-mentioned publicly available solutions have the following shortcomings: the sealing structure of the expansion joint requires a large number of high-strength bolts to connect with the concrete structure, which makes subsequent maintenance or replacement inconvenient. Summary of the Invention

[0005] The purpose of this invention is to address the problem in the prior art that the sealing structure requires a high-strength connection to the concrete structure via bolts, which is inconvenient for disassembly and assembly, and to propose a leak-proof structure for subway expansion joints.

[0006] The technical solution of the present invention is as follows: A seepage prevention structure for subway expansion joints, used to seal the expansion joint between two concrete components, with a waterstop pre-embedded at the bottom of the expansion joint; a first-level step and a second-level step are set from top to bottom at the ends of the two concrete components that are close to each other, and a drainage groove is inclinedly set at the intersection of the horizontal plane of the second-level step and the vertical plane of the first-level step; a seepage prevention mechanism is set inside the expansion joint, with steel edges on both sides of the seepage prevention mechanism, and pressure plates and inclined plates respectively set at the top and bottom of the steel edges, with the pressure plates pressing on the first-level step and the inclined plates inserted into the drainage groove.

[0007] Preferably, two waterstops are arranged side by side, with fireproof filler between the two waterstops.

[0008] Preferably, the anti-leakage mechanism includes a primary sealing component, a secondary sealing component, and a tertiary sealing component arranged sequentially from bottom to top. The primary sealing component is used to seal the gap below the horizontal plane of the secondary step, the secondary sealing component is used to seal the gap below the horizontal plane of the primary step, and the tertiary sealing component is used to seal the gap above the horizontal plane of the primary step.

[0009] Preferably, the primary sealing assembly includes an elastic sealing plate a that fits into the gap below the horizontal plane of the secondary step, and a rigid plate a disposed on top of the elastic sealing plate a, the rigid plate a pressing against the horizontal plane of the secondary step.

[0010] Preferably, the secondary sealing assembly includes a rigid plate b detachably disposed in the middle of the rigid plate a, and an elastic sealing plate b disposed on the steel edge. The elastic sealing plate b is detachably connected to the rigid plate a, and the elastic sealing plate b abuts against the rigid plate b.

[0011] Preferably, multiple insertion holes are provided on both sides of the rigid plate a, and a threaded cylinder is provided on the steel edge opposite to the insertion hole. A screw is fitted inside the threaded cylinder, and the other end of the screw is inserted into the insertion hole.

[0012] Preferably, the three-stage sealing assembly includes a rigid plate c detachably mounted on the rigid plate b, and elastic sealing plates c mounted on both sides of the rigid plate c, wherein the upper surfaces of the elastic sealing plates c, the rigid plate c, and the concrete component are coplanar.

[0013] Compared with the prior art, the present invention has the following beneficial technical effects: by using a waterstop, a primary sealing component, a secondary sealing component, and a tertiary sealing component, four anti-seepage barriers are formed, which have a good anti-seepage effect. In addition, except for the waterstop, which is the core anti-seepage component and needs to be pre-embedded, the other structures only need to be connected to each other with ordinary bolts and installed in the expansion joint. There is no need to use expansion bolts or other methods to make high-strength connections with concrete components, which is convenient for disassembly and assembly, and subsequent maintenance and replacement are also simpler. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention; Figure 2 This is a structural schematic diagram of a concrete component; Figure 3 for Figure 1 A schematic diagram of the structure after the concrete components have been removed; Figure 4 for Figure 3 Exploded view; Reference numerals: 1. Concrete component; 2. Primary step; 3. Secondary step; 4. Drainage channel; 5. Drainage pipe; 6. Embedded groove; 7. Waterstop; 8. Fireproof filler; 9. Elastic sealing plate a; 10. Rigid plate a; 11. Rigid plate b; 12. Steel edge; 13. Pressure plate; 14. Inclined insert plate; 15. Elastic sealing plate b; 16. Rigid plate c; 17. Elastic sealing plate c; 18. Screw; 19. Insertion hole; 20. Bolt a; 21. Bolt b; 22. Countersunk hole a; 23. Countersunk hole b; 24. Threaded cylinder. Detailed Implementation

[0015] Example 1; as Figures 1-3 As shown, this invention proposes a subway expansion joint anti-leakage structure to seal the expansion joint between two concrete components 1. A waterstop 7 is pre-embedded at the bottom of the expansion joint, which is the first and core line of defense against leakage. The waterstop 7 is a steel-edged rubber waterstop with steel plates on both sides. The steel plates are directly cast into the concrete, forming a pre-embedded groove 6 in the concrete. When displacement occurs on both sides of the expansion joint, the rubber body is compressed, stretched, or sheared, but it recovers its original shape due to its high elasticity, maintaining the seal. The steel plates on both sides have extremely strong anchoring force with the concrete, preventing them from being pulled out of place. At the ends of the two concrete components 1 that are close to each other, a first-level step 2 and a second-level step 3 are set from top to bottom. At the intersection of the horizontal plane of the second-level step 3 and the vertical plane of the first-level step 2, a drainage channel is inclined. Multiple drainage pipes 5 are installed on the concrete component 1, with one end of the drainage pipe 5 connected to the drainage trough 4 and the other end connected to the drainage system. If there is a slight seepage, the water droplets will flow into the bottom of the inclined drainage trough 4 and then be guided into the station's drainage ditch or collection well through the pre-embedded drainage pipe 5, realizing the transformation from blocking to drainage and ensuring the dryness of the operating space. An anti-seepage mechanism is installed in the expansion joint. The anti-seepage mechanism has steel edges 12 on both sides, and pressure plates 13 and inclined plates 14 are respectively installed on the top and bottom of the steel edges 12. The pressure plates 13 press on the first step 2, and the inclined plates 14 are inserted into the drainage trough 4. The pressure plates 13, steel edges 12 and inclined plates 14 are equivalent to clamping the anti-seepage mechanism in the expansion joint, without the need for high-strength connection with the concrete by bolts, which facilitates the subsequent inspection and replacement of the anti-seepage mechanism.

[0016] Furthermore, two waterstops 7 are arranged side by side, and a fireproof filler 8 is provided between the two waterstops 7. In an optional embodiment, the part of the waterstop 7 located in the expansion joint is arc-shaped, and the centers of the upper and lower arc-shaped waterstops 7 coincide.

[0017] Example 2; as Figure 1 and Figure 2 As shown, the present invention proposes a subway expansion joint anti-leakage structure. Compared with Embodiment 1, this embodiment details the structure of the anti-leakage mechanism. The anti-leakage mechanism includes a primary sealing component, a secondary sealing component, and a tertiary sealing component arranged sequentially from bottom to top. The primary sealing component is used to seal the gap below the horizontal plane of the secondary step 3, the secondary sealing component is used to seal the gap below the horizontal plane of the primary step 2, and the tertiary sealing component is used to seal the gap above the horizontal plane of the primary step 2.

[0018] Example 3; as Figure 3 and Figure 4 As shown, the present invention proposes a subway expansion joint anti-leakage structure. Compared with Embodiment 2, this embodiment details the structure of the primary sealing component, the secondary sealing component, and the tertiary sealing component. The primary sealing assembly includes an elastic sealing plate a9 that fits into the gap below the horizontal plane of the secondary step 3, and a rigid plate a10 disposed on top of the elastic sealing plate a9, the rigid plate a10 pressing against the horizontal plane of the secondary step 3.

[0019] The secondary sealing assembly includes a rigid plate b11 detachably disposed in the middle of the rigid plate a10, and an elastic sealing plate b15 disposed on the steel edge 12. The elastic sealing plate b15 is detachably connected to the rigid plate a10 and abuts against the rigid plate b11. The elastic sealing plate b15 presses against the rigid plate a10 to achieve a seal and prevent leakage. Water overflowing from below will enter the drainage groove 4 and then be discharged from the drainage pipe 5. Specifically, the elastic sealing plate b15 is provided with multiple countersunk holes a22, and the rigid plate a10 is provided with multiple threaded holes opposite to the countersunk holes a22. The elastic sealing plate b15 and the rigid plate a10 are then connected by bolts a20. It should be noted that the head of the bolt a20 is located inside the countersunk hole a22. Furthermore, multiple insertion holes 19 are provided on both sides of the rigid plate a10. A threaded cylinder 24 is provided on the steel edge 12, which is opposite to the insertion hole 19. A screw 18 is fitted inside the threaded cylinder 24. The other end of the screw 18 is inserted into the insertion hole 19. It should be noted that the diameter of the insertion hole 19 is larger than the diameter of the screw 18. The screw 18 needs to have a certain amount of movement in the insertion hole 19 to cope with horizontal and vertical expansion and contraction. During installation, first insert the screw 18 into the insertion hole 19 to the end, and then wait for the steel edge 12 to be in place before screwing the screw 18 into the threaded cylinder 24.

[0020] The three-stage sealing assembly includes a rigid plate c16 detachably mounted on a rigid plate b11, and elastic sealing plates c17 mounted on both sides of the rigid plate c16. The upper surfaces of the elastic sealing plates c17, the rigid plate c16, and the concrete component 1 are coplanar. Specifically, the rigid plate a10 has multiple threaded holes along its length, the rigid plate b11 has multiple through holes corresponding to the threaded holes, and the rigid plate c16 has multiple countersunk holes b23 corresponding to the threaded holes. The rigid plates a10, b11, and c16 are then connected by bolts b21. The rigid plate c16 presses against the top of the elastic sealing plate b15 to further improve the sealing effect. The elastic sealing plate c17 rests against the vertical surface above the first-stage step 2 to seal the top of the entire expansion joint, ensuring the sealing effect while improving aesthetics.

[0021] In summary, when using this invention, a waterstop 7 and a fireproof filler 8 are pre-embedded. The waterstop 7 serves as the core anti-leakage structure. When pouring concrete component 1, a first-level step 2 and a second-level step 3 need to be poured. Then, the elastic sealing plate a9 is inserted into the gap below the horizontal plane of the second-level step 3. At this time, the rigid plate a10 is pressed on the horizontal plane of the second-level step 3. Then, the steel edge 12 and the elastic sealing plate b15 are tilted and moved so that the inclined insert plate 14 is inserted into the drainage groove 4. At this time, the pressure plate 13 is pressed on the horizontal plane of the first-level step 2. Then, the screw 18 is screwed into the threaded cylinder 24. Next, the elastic sealing plate b15 and the rigid plate a10 are connected by the bolt a20. Then, the rigid plate b11 is inserted between the two elastic sealing plates b15. At this time, the elastic sealing plate b15 is basically fixed, and the steel edge 12 can no longer tilt and move upward. Finally, the rigid plate c16 is pressed on the rigid plate b11 and the elastic sealing plate b15. The rigid plate a10, the rigid plate b11 and the rigid plate c16 are connected by the bolt b21. Due to the compression of the elastic sealing plate b15 by the rigid plate b11, the inclined insert plate 14 cannot move upward from the drainage groove 4, thus ensuring the stability of the entire structure. During disassembly, first remove bolt b21, then lift rigid plate c16 and elastic sealing plate c17 upwards, then lift rigid plate b11 upwards, then unscrew screw 18 from threaded cylinder 24 and continue moving it into insertion hole 19, then tilt steel edge 12 upwards and remove it, and finally remove rigid plate a10 and elastic sealing plate a9. In this invention, four anti-seepage barriers are formed by waterstop 7, primary sealing component, secondary sealing component and tertiary sealing component, which have good anti-seepage effect. In addition to the waterstop, which is the core anti-seepage component, which needs to be pre-embedded, the other structures only need to be connected to each other by ordinary bolts and installed in the expansion joint. It is not necessary to use expansion bolts or other methods to make high-strength connection with concrete component 1, which is convenient for disassembly and assembly, and subsequent maintenance and replacement are also simpler.

[0022] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A subway deformation joint anti-leakage structure for sealing a deformation joint between two concrete members (1), a waterstop (7) being embedded at the bottom of the deformation joint; characterized in that, Two concrete components (1) are provided with a first-level step (2) and a second-level step (3) from top to bottom at their respective ends. A drainage trough (4) is inclined at the intersection of the horizontal plane of the second-level step (3) and the vertical plane of the first-level step (2). A seepage prevention mechanism is provided in the expansion joint. The seepage prevention mechanism has steel edges (12) on both sides. A pressure plate (13) and an inclined plate (14) are provided at the top and bottom of the steel edge (12) respectively. The pressure plate (13) presses on the first-level step (2), and the inclined plate (14) is inserted into the drainage trough (4).

2. The anti-leakage structure for subway expansion joints according to claim 1, characterized in that, Two waterstops (7) are set side by side, and a fireproof filler (8) is set between the two waterstops (7).

3. The anti-leakage structure for subway expansion joints according to claim 1, characterized in that, The anti-leakage mechanism includes a first-level sealing component, a second-level sealing component and a third-level sealing component arranged from bottom to top. The first-level sealing component is used to seal the gap below the horizontal plane of the second-level step (3), the second-level sealing component is used to seal the gap below the horizontal plane of the first-level step (2), and the third-level sealing component is used to seal the gap above the horizontal plane of the first-level step (2).

4. The anti-leakage structure for subway expansion joints according to claim 3, characterized in that, The primary sealing assembly includes an elastic sealing plate a (9) that fits into the gap below the horizontal plane of the secondary step (3), and a rigid plate a (10) set on top of the elastic sealing plate a (9), the rigid plate a (10) pressing on the horizontal plane of the secondary step (3).

5. The anti-leakage structure for subway expansion joints according to claim 4, characterized in that, The secondary sealing assembly includes a rigid plate b (11) that is detachably disposed in the middle of a rigid plate a (10), and an elastic sealing plate b (15) disposed on a steel edge (12). The elastic sealing plate b (15) is detachably connected to the rigid plate a (10) and abuts against the rigid plate b (11).

6. The anti-leakage structure for subway expansion joints according to claim 5, characterized in that, Multiple insertion holes (19) are provided on both sides of the rigid plate a (10). A threaded cylinder (24) is provided on the steel edge (12) opposite to the insertion hole (19). A screw (18) is provided inside the threaded cylinder (24). The other end of the screw (18) is inserted into the insertion hole (19).

7. The anti-leakage structure for subway expansion joints according to claim 5, characterized in that, The three-level sealing assembly includes a rigid plate c (16) that is detachably mounted on a rigid plate b (11), and elastic sealing plates c (17) mounted on both sides of the rigid plate c (16). The upper surfaces of the elastic sealing plates c (17), the rigid plate c (16), and the concrete member (1) are coplanar.

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