Diaphragm wall and toe board water pressure sealing type flexible water stop structure and construction method

Abstract

The invention discloses a diaphragm wall and toe board water pressure sealing type flexible water stop structure and a construction method. The diaphragm wall and toe board water pressure sealing typeflexible water stop structure and the construction method can greatly improve the anti-seepage reliability and large deformation adaptability of a connecting part of a diaphragm wall and a toe board.The water pressure sealing type flexible water stop structure comprises a water stop copper sheet, a chloroprene rubber rod and plastic filler, wherein the chloroprene rubber rod is arranged at the top end of a structural joint between the toe board and top concrete; the right-angle part between the downstream side face of the top concrete and the top face of the toe board is filled with the plastic filler, and a bulge structure is formed; and the water stop copper sheet is arranged in the structural joint, half of the water stop copper sheet is pre-buried in the downstream side of the top concrete, and the other half of the water stop copper sheet is poured into the toe board. The structural joint is filled with the plastic filler under the water pressure extrusion effect, and the waterstop effect is achieved. The water stop capacity is increased along with increasing of the water pressure, and therefore high-water-head anti-seepage water stop is achieved. The water stop copper sheet can achieve the anti-seepage water stop effect and further assist the chloroprene rubber rod in guaranteeing the deformation space of the plastic filler.

Description

technical field [0001] The invention relates to a water-pressure-sealed flexible water-stop structure of a cut-off wall and a toe plate and a construction method, which is suitable for a concrete face rockfill dam project with large differential settlement after construction and whose foundation adopts a cut-off wall to prevent seepage, or has similar functions The required anti-seepage and water-proof structure. Background technique [0002] When the foundation of the dam is a permeable soil layer, in order to improve the anti-seepage effect, the anti-seepage wall is generally used for anti-seepage of the dam foundation, and it is connected with the anti-seepage structure of the dam body. For concrete face rockfill dams, the cut-off wall is generally connected to the toe slab, and one or more water-stop structures can be set at the connection part. Due to the foundation settlement caused by the construction of the dam structure and water storage, the anti-seepage wall is a...

AI Technical Summary

Problems solved by technology

For projects with large differences in foundation settlement, the reliability of the above-mentioned treatment measures is poor. The rubber waterstop sheet will cause damage; the connecting plate will also undergo large settlement deformation under the action of water pressure after water storage, and the function of the transitional cutoff wall and the dam antiseepage structure settlement difference is relatively limited; from the cutoff wall to the toe plate There are two structural joints, increasing the anti-seepage weak link

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