Rock-fill concrete (RFC) and cemented sand and gravel (CSG) composite material dam as well as design and construction method thereof

Abstract

The invention belongs to a rock-fill concrete (RFC) and cemented sand and gravel (CSG) composite material dam in the technical field of gravity dams as well as a design and construction method thereof. A dam body of the composite material dam comprises an RFC part and a CSG part; and the dam body at the upstream side of the composite material dam is the RFC part, and the dam body at the downstream side is the CSG part. The RFC part is poured by adopting an RFC material. The CSG part is poured by adopting a CSG material. The advantages of the two materials of the RFC and the CSG can be simultaneously exerted; because the upstream side of the dam body is poured by adopting the RFC, the procedure of distributing seepage preventing planes on the upstream surface can be omitted, thereby simplifying construction, shortening the construction period, and reducing the engineering amount of the dam body; and the sand and gravel of a riverbed and excavating waste slag can be used for preparing the materials of the RFC and the CSG, therefore, the invention can more fully utilizes excavating materials, reduce the construction cost and greatly reduce negative impact on environment and has favorable social, economic and environmental ecological benefits.

Description

technical field [0001] The invention belongs to the technical field of gravity dams, in particular to a new type of gravity dam, in particular to a rockfill concrete and cemented sand and gravel composite material dam and its design and construction method. Background technique [0002] In order to simplify the construction process and reduce the project cost, on the basis of ordinary concrete gravity dams, new material gravity dams such as roller compacted concrete dams, rock-fill concrete dams, and cemented sand and gravel dams have been gradually developed. [0003] Rock-fill concrete dam means that the dam construction material is rock-fill concrete, that is, the rock-fill material that has not been screened or preliminarily screened is directly put into the warehouse, and then special self-compacting concrete is poured to fill the voids of the rock-fill material to form a rock-fill concrete dam body. This type of dam uses rockfill as aggregate, which reduces the amount ...

AI Technical Summary

Problems solved by technology

However, due to the poor anti-seepage performance of CSG materials, additional anti-seepage treatment measures need to be taken on the upstream and downstream surfaces of the dam body; The amount of work has increased

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