硗碛水电站土石坝坝肩强风化岩体处理  

Treatment of Highly Weathered Rock Mass at the Abutment of Earth-Rock Dam in Qiaoqi Hydropower Project

作　　者：王寿根[1] 

机构地区：[1]国家电力公司成都勘测设计研究院,成都610072

出　　处：《中国工程科学》2005年第3期78-83,共6页Strategic Study of CAE

摘　　要：硗碛水电站宽级配碎石土心墙堆石坝坝高 12 3m ,坝肩两岸千枚岩、砂岩岩体强风化水平深度 14 6～ 6 6 4m ,由于岩体强风化深度大 ,按规范开挖工程量巨大 ,故仅开挖至强风化上部 (局部达强风化中部 ) ,突破该规范要求。文章详实论述了硗碛水电站坝肩强风化岩体处理方案、灌浆试验成果及工艺要求 ,论证了采用灌浆加固及防渗处理的可行性 ,提出了处理措施及施工控制标准。The abutment is the part where the by-pass seepage and contact erosion often happen to make the dam not work normally, which is the key point during design and construction, so Design Specifications for Rolled Earth-Rock Fill Dams (SL274-2001) require excavating into the slightly weathered rock mass for the core wall and the reversed filter and the abutment. The spreading gradation earth-rock fill dam with crushed-stone-earth core wall is 123m high,and the highly weathering natural depth of the phyllite and sandstone at abutments on both bank is 14.6～66.4m. According to the Specification, the excavation quantity is enormous. It is practically excavated into the highly weathering zone, which can not meet with the Specification. The treatment scheme for the highly weathering rock mass on both abutments and grouting tests and grouting technics are introduced in detail. The feasibility to adopt consolidation grouting and seepage treatment measures is argued and the treatment measures and construction control standards are proposed.

关 键 词：硗碛水电站 土石坝 坝肩处理 强风化岩体 固结灌浆 帷幕灌浆 

分 类 号：TV4[水利工程—水工结构工程]