Water stop structure for assembled cofferdam

Abstract

The utility model discloses a water-stop structure for an assembled cofferdam, which comprises a water-stop seat, first water-stop rubber and second water-stop rubber, the water-stop seat is arranged in a splicing seam and respectively connected with assembling blocks on two sides, the first water-stop rubber is arranged at the top of the assembling blocks and covers the splicing seam, and the second water-stop rubber is arranged at the top of the assembling blocks and covers the splicing seam. The second water stop rubber is arranged between the water stop seat and the first water stop rubber, the top face of the second water stop rubber is of a plane structure provided with a non-return groove, the bottom face of the second water stop rubber is of an arc-shaped structure connected with the water stop seat, the two sides of the second water stop rubber are connected with the splicing blocks in a sealed mode, and a deformation cavity is formed in the middle of the second water stop rubber. The waterproof structure is simple in structure and convenient to install, a two-section type waterproof mode is adopted, if the first water stop on the outer side loses efficacy, the second water stop on the inner side is under the action of water pressure, the non-return groove can be pressed to be opened, the connection tightness between the non-return groove and the splicing block is improved, and therefore the good water stop effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of operation and maintenance of water conservancy projects, in particular to a water stop structure for a prefabricated cofferdam. Background Art

[0002] The water diversion and regulation project has effectively alleviated the severe situation of uneven distribution of water resources in China. Currently, there are more and more large-scale long-distance water diversion and regulation projects under construction and in operation. The main canal of the water diversion and regulation project operates in a single line. As an irreplaceable water source in the water receiving area, it does not have the condition of stopping water for maintenance. The channel transports water continuously throughout the year, or is affected by extreme weather, there will be durability and water damage problems. For small-area damage to the canal slope, underwater non-dispersible concrete pouring, underwater installation of precast concrete lining plates by divers, etc. are often used; for large-area damage, the dry-land repair technology of the cofferdam without stopping water is mostly used. Due to the large coverage area, the above-mentioned cofferdams are relatively large in volume. In order to solve the problem of limited transportation, a split structure is mostly used, which is spliced on site, and a water stop structure is installed between the splicing blocks. However, when the commonly used P-type, I-type or L-type water stop rubbers are used for underwater cofferdams, the effect cannot meet the expectation, and a good dry-land environment cannot be maintained inside the cofferdam. Summary of the Invention

[0003] In order to solve the above problems, the utility model provides a water stop structure for a prefabricated cofferdam, and the following technical solutions can be specifically adopted:

[0004] The water stop structure for a prefabricated cofferdam described in the utility model includes a water stop seat, a first water stop rubber and a second water stop rubber. The water stop seat is arranged in the splicing joint and is connected to the splicing blocks on both sides respectively. The first water stop rubber is arranged on the top of the splicing block and covers the splicing joint. The second water stop rubber is arranged between the water stop seat and the first water stop rubber. The top surface of the second water stop rubber is a planar structure provided with anti-reverse grooves, the bottom surface of the second water stop rubber is an arc structure connected to the water stop seat, both sides of the second water stop rubber are hermetically connected to the splicing block, and a deformation cavity is arranged in the middle of the second water stop rubber.

[0005] The water stop seat is a square steel welded to the splicing block.

[0006] Both sides of the top surface of the first water stop rubber are provided with anti-warping arc edges, and magnetic powder magnetically connected to the splicing block is evenly arranged on the bottom surface of the first water stop rubber.

[0007] The anti-reverse grooves of the second water stop rubber are arranged on both sides of the top surface and are arranged along the extension direction of the splicing joint.

[0008] Multiple anti-slip grooves are arranged on the side surface of the second water stop rubber.

[0009] The deformation cavity of the second water stop rubber is a circular through hole longitudinally extending along the splicing joint.

[0010] The water stop structure for the assembled cofferdam provided by the utility model has a simple structure and is convenient to install. It adopts a two-stage waterproofing method. If the first water stop on the outside fails, under the action of water pressure, the anti-reverse groove of the second water stop on the inside will be pressed open, improving the connection tightness with the splicing block, thereby obtaining a good water stop effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic structural diagram of the utility model.

[0012] Figure 2 is Figure 1 a schematic structural diagram of the second water stop rubber in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] The following will describe in detail the embodiments of the utility model with reference to the drawings. The embodiments are implemented on the premise of the technical solution of the utility model, and the detailed implementation manners and specific construction processes are given. However, the protection scope of the utility model is not limited to the following embodiments.

[0014] As Figure 1 , 2 shown, the water stop structure for the assembled cofferdam of the utility model includes a water stop seat 1, a first water stop rubber 2, and a second water stop rubber 3. Usually, the water stop seat 1 is made of square steel profiles that are easy to process, and it is installed in the splicing seam and welded to the assembled blocks M on both sides respectively. After the assembled blocks M are spliced, a square-shaped water stop groove is formed at the joint. The first water stop rubber 2 is installed above the water stop groove and is a flat rubber laid on the top of the assembled block M. During its manufacture, magnetic powder is evenly filled on the lower surface, so that it can be magnetically fixed to the top surface of the assembled block M. Further, anti-warping arc edges are provided on both sides of the top surface of the first water stop rubber 2. After the cofferdam enters the water, under the action of water pressure, the first water stop rubber 2 closely adheres to the panel of the assembled block M, thereby forming a seal. In order to prevent the first water stop rubber 2 from failing, a second water stop rubber 3 is also installed between the water stop seat 1 and the first water stop rubber 2.

[0015] A deformation cavity 31 is provided in the middle of the second water stop rubber 3, which is a circular through hole extending longitudinally along the splicing seam in this embodiment. The top surface of the second water stop rubber 3 is a flat structure provided with an anti-reverse groove 32, which is in contact with the bottom surface of the first water stop rubber 2; the bottom surface is an arc structure and is in contact with the water stop seat 1. The two sides of the second water stop rubber 3 are hermetically connected to the assembled block M. In order to prevent it from falling off, multiple anti-slip grooves 33 are provided on its side surface.

[0016] The above-mentioned backflow prevention grooves 32 are each provided with one on both sides of the top surface of the second water-stop rubber 3, and are both V-shaped grooves arranged along the extension direction of the splicing joint. When the waterproofing of the first water-stop rubber 2 fails and the top surface is compressed and deformed, the rubber on the outside of the backflow prevention groove 32 is extruded towards the splicing block M on the side, improving the connection tightness between the two, thereby improving the water-stop effect.

[0017] It should be noted that in the description of the present invention, terms indicating orientation or positional relationships such as "front", "rear", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

Claims

1. A water-stop structure for an assembled cofferdam, characterized in that: It includes a water stop seat, a first water stop rubber and a second water stop rubber. The water stop seat is arranged in the splicing joint and connected to the assembled blocks on both sides respectively. The first water stop rubber is arranged on the top of the assembled block and covers the splicing joint. The second water stop rubber is arranged between the water stop seat and the first water stop rubber. The top surface of the second water stop rubber is a plane structure provided with a reverse stop groove, the bottom surface of the second water stop rubber is an arc structure connected to the water stop seat, both sides of the second water stop rubber are hermetically connected to the assembled block, and a deformation cavity is arranged in the middle of the second water stop rubber.

2. The water stop structure for the assembled cofferdam according to claim 1, wherein: The water stop seat is a square steel welded to the assembled block.

3. The water stop structure for the assembled cofferdam according to claim 1, wherein: Anti-warping arc edges are arranged on both sides of the top surface of the first water stop rubber, and magnetic powder magnetically connected to the splicing block is evenly arranged on the bottom surface of the first water stop rubber.

4. The water stop structure for the assembled cofferdam according to claim 1, wherein: The reverse stop grooves of the second water stop rubber are arranged on both sides of the top surface and are arranged along the extension direction of the splicing joint.

5. The water stop structure for the assembled cofferdam according to claim 1, characterized in that: Multiple anti-slip grooves are arranged on the side surface of the second water stop rubber.

6. The water stop structure for the assembled cofferdam according to claim 1, wherein: The deformation cavity of the second water stop rubber is a circular through hole longitudinally extending along the splicing joint.

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