Mixed anti-seepage dam

Abstract

The invention discloses a mixed anti-seepage dam. The mixed anti-seepage dam comprises an upstream lower rockfill material, a downstream lower rockfill material, an upstream upper rockfill material, adownstream upper rockfill material, a dry stone revetment, transition materials, an asphalt concrete core wall, a concrete base, curtain grouting and a wave wall, wherein the asphalt concrete core wall is arranged in the transition materials positioned between the upstream lower rockfill material and the downstream lower rockfill material; a high-strength reinforced geomembrane is arranged in thetransition materials positioned between the upstream upper rockfill material and the downstream upper rockfill material to replace the asphalt concrete core wall; the upper half part of a traditionalasphalt concrete core wall dam is changed into the high-strength reinforced polyethylene geomembrane, and the anti-seepage effect is achieved through the watertightness of the geomembrane; and the upstream rockfill material and the downstream rockfill material are rockfill materials with the large deformation modulus. The dam body is simple in form and high in construction speed, the requirementfor the upstream rockfill material and the downstream rockfill material is low, and the mixed anti-seepage dam has good popularization value for projects with insufficient dam building materials in dam site areas.

Description

technical field [0001] The invention relates to an anti-seepage dam, in particular to a hybrid anti-seepage dam. Background technique [0002] Such as figure 1 As shown, the asphalt concrete core dam is a common local material dam type. It is an earth-rock dam in which an asphalt concrete core wall is set in the dam body as an anti-seepage body. Asphalt concrete has good impermeability and adaptability to deformation. When there is no natural anti-seepage material near the dam site, asphalt concrete can be used as the anti-seepage core wall of the earth-rock dam, and various permeable and semi-permeable sand and gravel materials or rockfills can be used for the dam shell on both sides. It has many advantages: it is less affected by the external climate and light, and is almost not affected by the hot summer and severe cold. The paving and compaction of asphalt concrete are simpler than the anti-seepage face construction of the face rockfill dam. The concrete base is easy...

AI Technical Summary

Problems solved by technology

[0003] However, asphalt concrete core dams also have the following disadvantages: ① Complicated force: when retaining water, the asphalt core wall is subjected to horizontal thrust, and, affected by the additional vertical load when the dam body settles, the stress state is complex, which often leads to the asphalt core wall being damaged If the dam body is damaged, the dam body will leak, especially when the materials used in the upstream and downstream rockfill areas of the dam body are different; In the dam body, and it is supported by the dam body filler, so the maintenance conditions are quite difficult, or even non-existent.

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