Core-wall rock-fill dam

Abstract

A core-wall rock-fill dam comprises a core wall. A first rock-fill layer is arranged at the bottom of the upstream side of the core wall, and a first soft-rock filling area is formed in the first rock-fill layer from bottom to top. A first transition material layer which completely wraps the outer surface of the first soft-rock filling area is arranged on the non-bottom area of the first soft-rockfilling area in a covering mode. A rock-fill layer separation structure capable of separating the first soft-rock filling area into blocky areas to be stably supported is arranged in the first soft-rock filling area. A reverse filtering material layer is arranged at the bottom of the downstream side of the core wall, and a second soft-rock filling area is formed in the reverse filtering materiallayer from bottom to top. A second transition material layer is arranged between the upstream side of the second soft-rock filling area and the downstream side of the core wall. An upstream revetmentis arranged on the upstream side of the first transition material layer, and a downstream revetment is arranged on the downstream side of the second soft-rock filling area. The core-wall rock-fill damfurther comprises a drainage system arranged at the downstream of the core wall. Excavated materials and locally-drawn materials can be effectively utilized, soft rock is utilized for damming to thelargest extent, the problem of engineering earthwork balance is solved, and the engineering investment is reduced.

Description

technical field [0001] The invention belongs to water conservancy and hydropower projects, in particular to a core rockfill dam. Background technique [0002] In hydropower stations and reservoirs, it is necessary to build dams to retain water. Local material dams are often used due to the advantages of being able to obtain materials nearby, better adapting to topographic and geological conditions, good seismic performance, and good economy. [0003] For areas where soft rock is widely distributed, soft rock is generally only used in the downstream area of ​​the core wall due to its low strength and easy softening when exposed to water. For the upstream area, it is necessary to find or purchase dam-building materials with higher strength. . On the one hand, the existing practice will lead to increased economic costs due to the purchase and transportation of materials; on the other hand, the abandonment of local soft rock materials will directly increase the size of the sla...

AI Technical Summary

Problems solved by technology

On the one hand, the existing practice will lead to increased economic costs due to the purchase and transportation of materials; on the other hand, discarding local soft rock materials will directly increase the scale of the slag yard and cause adverse effects on the environment

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