Earth-rock dam composite core wall structure and construction method thereof

Abstract

The invention discloses an earth-rock dam composite core wall structure and a construction method thereof. The earth-rock dam composite core wall structure comprises an asphalt concrete core wall or aclay core wall filled in the center, and an HDPE diaphragm; a core wall foundation is arranged at the bottom of the asphalt concrete core wall or the clay core wall; the HDPE diaphragm is closely attached to the upstream face of the asphalt concrete core wall or the clay core wall; and before the asphalt concrete core wall or the clay core wall is filled, the HDPE diaphragm is arranged on the upstream side of the asphalt concrete core wall or the clay core wall firstly, and the bottom of the HDPE diaphragm is embedded into the core wall foundation. According to the earth-rock dam composite core wall structure, the influence of the environment on filling of the asphalt concrete core wall or the clay core wall is reduced, the life of an earth-rock dam anti-seepage system is prolonged, and the stability of the earth-rock dam anti-seepage system is improved.

Description

technical field [0001] The invention relates to the technical field of anti-seepage of the core wall of an earth-rock dam, in particular to a composite core wall structure and a construction method of an earth-rock dam. Background technique [0002] In the design and construction of earth-rock dams, roller compacted asphalt concrete or local cohesive soil are widely used as anti-seepage core wall materials. In practice, asphalt concrete or cohesive soil is used as anti-seepage core wall dam construction materials, which have strict specifications and test requirements for construction technology , but in the completed roller compacted asphalt concrete core wall dams or clay core wall dams, some dams still have core wall defects or even anti-seepage failures due to dam settlement or construction quality in the later stage, and the realization of The restoration of the anti-seepage system requires a lot of additional resources, which will seriously affect the safe operation of...

AI Technical Summary

Problems solved by technology

[0002] In the design and construction of earth-rock dams, roller compacted asphalt concrete or local cohesive soil are widely used as anti-seepage core wall materials. In practice, asphalt concrete or cohesive soil is used as anti-seepage core wall dam construction materials, which have strict specifications and test requirements for construction technology , but in the completed roller compacted asphalt concrete core wall dams or clay core wall dams, some dams still have core wall defects or even anti-seepage failures due to dam settlement or construction quality in the later stage, and the realization of The repair of the anti-seepage system requires a lot of additional resources, which will seriously affect the safe operation of the dam

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