摘要
针对西南某一级水电站枢纽区两岸谷坡高陡、开挖过程中的岩体爆破松弛现象显著的问题,为查明该水电站坝区建基面岩体的爆破程度及松弛圈特征,基于现场声波检测、现场地质环境调查及室内数据整理统计,结合声波孔波速值和声波衰减率,评价了左右岸和河床坝基岩体在开挖过程中的卸荷松弛程度及松弛圈深度等特征,并分析了引起左右岸坝基岩体松弛差异的原因,为评价坝基岩体质量提供了基础。
The slops of hydropower station in Southwest region are high and steep.The blasting relaxation is serious in the process of excavation.In order to find out the explosion degree and features of loose circle,this article evaluates the unloading relaxation degree and feature of loose circle of the dam foundation in the process of excavation based on sonic wave test,site geological investigation and indoor mathematical statistics and combination with the sonic speed and decay rate.Finally,the reason of rock relaxation difference for left and right bank foundation is analyzed.Thus,it provides the basis for evaluation quality of rock body.
出处
《水电能源科学》
北大核心
2011年第1期69-72,共4页
Water Resources and Power
关键词
岩体
开挖
爆破
松弛
声波
rock body
excavation
blasting
relaxation
sonic wave
