Structure capable of preventing concrete face slab dam high-toe wall from being damaged

Abstract

The invention discloses a structure capable of preventing a concrete face slab dam high-toe wall from being damaged. A concrete face slab dam is constructed on a deep and thick covering layer; a faceslab is arranged on the upstream face of the concrete face slab dam and is connected with an enlarged face slab arranged at the dam toe through a water stop; a high-toe wall and a cutoff wall are arranged in front of the enlarged face slab; the enlarged face slab is connected with the high-toe wall through the water stop; a connecting plate is arranged between the high-toe wall and the cutoff wall; the high-toe wall, the cutoff wall and the connecting plate are connected through the water stop; and the high-toe wall and the cutoff wall penetrate into a bed rock. The structure avoids heavy excavation to the deep and thick covering layer and can be simultaneously constructed together with dam body filling and face slab pouring and can effectively shorten the construction period and reduce the project investment; and all deformations are absorbed by the cutoff wall and the connecting plate to ensure that deformation and displacement of the high-toe wall are in an acceptable scope.

Description

technical field [0001] The invention relates to a concrete face dam, in particular to a structure for preventing damage to the high toe wall of the concrete face dam. Background technique [0002] In the design of concrete face dams, the unfavorable terrain and geological conditions have caused difficulties in the layout of the plinth line. Using high-toe walls instead of plinths to connect foundations and panels can avoid unfavorable geological zones, but the amount of excavation is huge, and high-toe walls are subjected to huge upstream water pressure and dam soil pressure during the reservoir operation period and completion period. , It will cause deformation, displacement and then squeeze the face plate, destroying the anti-seepage system of the face face dam. A face rockfill dam in Nigeria, with a height of 125m, uses a section of high toe wall at the position of the toe plate. After water storage, the toe wall will be displaced under the water pressure of the reservoi...

AI Technical Summary

Problems solved by technology

[0002] In the design of concrete face dams, unfavorable terrain and geological conditions have caused difficulties in the layout of the plinth line

Using high-toe walls instead of plinths to connect foundations and panels can avoid unfavorable geological zones, but the amount of excavation is huge, and high-toe walls are subjected to huge upstream water pressure and dam soil pressure during the reservoir operation period and completion period. , which will cause deformation, displacement and then squeeze the face, destroying the anti-seepage system of the face dam

A face rockfill dam in Nigeria, with a height of 125m, uses a section of high toe wall at the position of the toe plate. After water storage, the toe wall will be displaced under the water pressure of the reservoir, causing the face plate to collapse and crush, resulting in 180L / s The main reason for the large water leakage is that the rockfill behind the high toe wall cannot provide a large passive earth pressure

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