龙滩碾压混凝土大坝建基面开挖轮廓设计  

Design of the Excavation Outline of Foundation for LongTan High RCC Dam

作　　者：周海慧[1] 赵红敏[1] 戴谦训[1] 

机构地区：[1]中国水电顾问集团中南勘测设计研究院,湖南长沙410014

出　　处：《水力发电》2007年第6期39-41,48,共4页Water Power

摘　　要：龙滩碾压混凝土大坝为目前世界上已建或在建最高的碾压混凝土坝,最大坝高216.5m。其坝基工程地质条件优越,坝基岩体较完整,力学强度高,大坝不存在沿坝基础深部的滑动失稳条件。设计中对龙滩碾压混凝土坝整体稳定控制面的确定,坝基可利用岩体选择,开挖轮廓设计,岩体质量检测标准及地质缺陷处理等均做了分析论证,从目前声波检测成果看,坝基岩体均满足合格标准。The Longtan RCC dam with the maximum height of 216.5 m is the highest RCC dam that has been built or under construction in the world now. The engineering geological conditions is superior, its rock mass more complete, with high mechanics strength. It is nonexistence that the non-stabillty failure of dam is a shear sliding along the deep department in the foundation. This paper introduces that the construction foundation base control monolithic stability of dam, the basis to select rock of dam foundation, designing the excavation outline of dam foundation, the standard for examining rock quantity and the method to treat geology blemish etc. The current acoustic wave detection results showed that the rock body of dam foundation can meet the requirements.

关 键 词：碾压混凝土坝 建基面 开挖轮廓 缺陷处理 龙滩水电站 

分 类 号：TV642.2[水利工程—水利水电工程]