Leakage-proof sealing structure of expansion joint
By using a sealing structure combining hemp rope asphalt filler and other materials in the expansion joint, the problem of poor waterproofing effect of underwater expansion joints is solved, and the effect of convenient construction, good waterproofing effect and long service life is achieved.
Patent Information
- Application Number
- CN202421853823.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-08-02
AI Technical Summary
Existing expansion joints are difficult to achieve effective waterproofing underwater, which is difficult to construct, has poor waterproofing effect, short service life and high maintenance costs.
Use hemp rope asphalt filler to fill the expansion joints, combine the rubber rod, water-stop rubber skin, expansion screws and pressure-reducing steel sheets to form a sealed waterproof layer, and apply a waterproof rubber layer if necessary.
It achieves the effects of convenient underwater construction, good waterproofing effect, long service life and low maintenance cost, and significantly improves the waterproof performance and service life of the expansion joint.
Smart Images
Figure CN222822188U_ABST
Abstract
Description
Technical Field
[0001] The technical solution relates to the technical field of water conservancy engineering, in particular to a water leakage-proof sealing structure for expansion joints. Background Art
[0002] As we all know, in order to prevent cracks or damage to building components due to changes in climate, temperature, etc., it is necessary to set an expansion joint at a certain distance from the building. Although expansion joints can protect buildings and extend their lifespan, they are also prone to water seepage and water erosion. In order to avoid water seepage, the expansion joints need to be sealed. The common sealing method is to repeatedly apply waterproof paint or cover it with a waterproof coating to form a sealed waterproof layer. As an important hydropower hub in the region, the applicant has found through practice that the existing sealing method is effective above the ground, but the effect is not ideal when implemented underwater. The reasons are: 1. Liquid and coating waterproof materials are very convenient to apply on dry building surfaces, but it is difficult to adhere to the building surface underwater, and underwater construction is difficult; 2. The water flow fluctuates greatly, and unformed waterproof materials are easily damaged by the impact of water flow and lose their waterproof effect; 3. The waterproof effect is poor, the service life is short, and the maintenance cost is high. Utility Model Content
[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a water-proof sealing structure for underwater expansion joints of dams, which has the effects of good waterproof effect, long service life, convenient construction and low maintenance cost. The specific scheme is as follows:
[0004] 1 dam body, 1-1 expansion joint, 2 hemp rope asphalt filler, 3 pressure relief steel sheet, 4 expansion screws, 5 rubber rods, 6 water-stop rubber skin, 7 waterproof glue, 8 plastic filler, 9 water surface.
[0005] The expansion joint anti-leakage sealing structure is characterized in that the expansion joint between the dam bodies is filled with hemp rope asphalt filler, the expansion joint opening is provided with a strip rubber rod to seal it, the expansion joint opening and the rubber rod are covered with a water-stop rubber skin, the two sides of the water-stop rubber skin are fixed by expansion screws arranged at intervals, a pressure-reducing steel sheet is provided between the expansion screws and the water-stop rubber skin, and the gap between the expansion joint opening and the water-stop rubber skin and the rubber rod (that is, the armpits on both sides of the rubber rod) is filled with plastic filler.
[0006] The hemp rope asphalt filler refers to a filler in which hemp rope is arranged, and the surface of the hemp rope is covered with asphalt.
[0007] The plastic filler is a SR plastic filler or a polyurea filler with strong adhesiveness.
[0008] The pressure reducing steel sheets are in the shape of discs, and several of them are spaced apart along the length direction of the water-stop rubber skin. The expansion screws pass through the pressure reducing steel sheets to fix both sides of the water-stop rubber skin on the dam body.
[0009] The pressure relief steel sheet can also be in the shape of a long strip and arranged parallel to the length direction of the water-stop rubber skin. The expansion screws are distributed on the pressure relief steel sheet at intervals. The expansion screws pass through the pressure relief steel sheet to fix both sides of the water-stop rubber skin on the dam body.
[0010] If necessary, a waterproof adhesive layer is applied to the outer side of the water-stop rubber skin, and the waterproof adhesive layer covers the expansion screws and the pressure-reducing steel sheet at the same time.
[0011] Further explanation of the technical effects achieved by this technical solution:
[0012] This structure is easy to construct, and the construction sequence is: level and clean the expansion joint → fill the expansion joint with hemp rope asphalt filler → seal the expansion joint with rubber rods → fill the plastic filler under the arms on both sides of the rubber rods → cover with water-stop rubber skin → fix with expansion screws and pressure-reducing steel sheets. Since the hemp rope has certain plasticity and overall connectivity, it can be easily filled into the expansion joint underwater without breaking. After the hemp rope asphalt filler fills the expansion joint, the diver needs to hammer it inwards to make it dense. The rubber rod also has good integrity and will not break or disperse due to the impact of water flow during construction, which is convenient for construction workers to fix. The joints of the rubber rods can be connected by overlapping and covering each other with water-stop rubber skins;
[0013] This structure has a long service life and good waterproof effect: the hemp rope asphalt filler, rubber rod and waterproof rubber skin all have good elasticity, that is, flexibility and ductility, and can adapt to the irregular deformation of the dam body or expansion joint surface and the deformation of the expansion joint. In particular, the hemp rope asphalt filler can fit the expansion joint tightly to form an effective waterproof layer to prevent moisture penetration. The rubber rod further blocks the expansion joint opening, enhancing the waterproof effect. The waterproof rubber skin covers the rubber rod and the expansion joint opening, further enhancing the waterproof effect. The expansion screw fixes the waterproof rubber skin, which facilitates construction and enhances the stability of the waterproof rubber skin. The purpose of the pressure relief steel sheet is to increase the action area of the expansion screw on the waterproof rubber skin, reduce the pressure, and make the expansion screw fix the waterproof rubber skin more firmly. The waterproof adhesive layer covers the expansion screw and the pressure relief steel sheet at the same time, delaying the rust rate of the expansion screw and the pressure relief steel sheet, and increasing the service life of the entire structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic cross-sectional structure diagram of Embodiment 1 of the present utility model;
[0015] Figure 2 It is a schematic diagram of the main structure of Example 1 of the utility model.
[0016] Explanation of the accompanying reference numerals: 1 dam body, 1-1 expansion joint, 2 hemp rope asphalt filler, 3 pressure relief steel sheet, 4 expansion screw, 5 rubber rod, 6 water-stop rubber skin, 7 waterproof glue, 8 plastic filler, 9 water surface. DETAILED DESCRIPTION
[0017] Example 1, see attached Figure 1-2 The expansion joint anti-leakage sealing structure is characterized in that the expansion joint between the dam body 1 is filled with hemp rope asphalt filler 2, the expansion joint opening is provided with a strip rubber rod 5 to seal it, the expansion joint opening and the rubber rod are covered with a water-stop rubber skin 6, and the two sides of the water-stop rubber skin are fixed by expansion screws 4 arranged at intervals, and a pressure-reducing steel sheet 3 is provided between the expansion screws and the water-stop rubber skin, and the gap between the expansion joint opening and the water-stop rubber skin and the rubber rod (that is, the armpits on both sides of the rubber rod) is filled with a plastic filler 8.
[0018] The hemp rope asphalt filler refers to a filler in which hemp rope is arranged, and the surface of the hemp rope is covered with asphalt.
[0019] The plastic filler is a SR plastic filler or a polyurea filler with strong adhesiveness.
[0020] The pressure relief steel sheet is also a long strip pressure plate, which is arranged parallel to the length direction of the water-stop rubber skin. The expansion screws are distributed on the pressure relief steel sheet at intervals. The expansion screws pass through the pressure relief steel sheet to fix both sides of the water-stop rubber skin on the dam body.
[0021] If necessary, a waterproof adhesive layer is applied to the outer side of the water-stop rubber skin, and the waterproof adhesive layer covers the expansion screws and the pressure-reducing steel sheet at the same time.
[0022] Experimental data
[0023] See attached Figure 2 This embodiment was tested at 9 below the water level of the Jinyintai hub dam where the applicant is located, with a height of 352m from the water level in front of the dam to 327m at the bottom of the dam. The expansion joint is 4cm wide, the rubber rod is 5cm in diameter, the water-stop rubber skin is 30cm wide and 1cm thick, and expansion screws are installed at intervals of 10cm on both sides of the expansion joint and 35cm up and down. The pressure plate is 100cm long, 6cm wide and 1.2cm thick. After testing, compared with the traditional installation method, the installation time is shortened by 12%, the installation cost is reduced by 8%, and no deformation or leakage has been found so far.
Claims
1. The expansion joint anti-leakage sealing structure is characterized in that The expansion joint (1-1) between the dam bodies (1) is filled with hemp rope asphalt filler (2), a strip rubber rod (5) is provided at the expansion joint opening to seal it, a water-stop rubber skin (6) covers the expansion joint opening and the rubber rod, the two sides of the water-stop rubber skin are fixed by expansion screws (4) arranged at intervals, a pressure-reducing steel sheet (3) is provided between the expansion screws and the water-stop rubber skin, and a plastic filler (8) is filled in the gap between the expansion joint opening and the water-stop rubber skin and the rubber rod.
2. The expansion joint water-leakage-proof sealing structure according to claim 1 is characterized in that: The hemp rope asphalt filler refers to a filler in which hemp rope is arranged, and the surface of the hemp rope is covered with asphalt.
3. The expansion joint water-leakage-proof sealing structure according to claim 1 is characterized in that: The plastic filler is SR plastic filler or polyurea filler.
4. The expansion joint water-leakage-proof sealing structure according to claim 1 is characterized in that: The pressure reducing steel sheets are in the shape of discs, and several of them are spaced apart along the length direction of the water-stop rubber skin. The expansion screws pass through the pressure reducing steel sheets to fix both sides of the water-stop rubber skin on the dam body.
5. The expansion joint water-leakage-proof sealing structure according to claim 1 is characterized in that: The pressure relief steel sheet is in the shape of a long strip and is arranged parallel to the length direction of the water-stop rubber skin. The expansion screws are distributed on the pressure relief steel sheet at intervals. The expansion screws pass through the pressure relief steel sheet to fix both sides of the water-stop rubber skin on the dam body.
6. The expansion joint water-leakage-proof sealing structure according to claim 1 is characterized in that: A waterproof adhesive layer (7) is applied to the outer side of the water-stop rubber skin, and the waterproof adhesive layer covers the expansion screw and the pressure-reducing steel sheet at the same time.