隔河岩电站洞群围岩松动圈检测及其厚度分析

Detection and Andlysis on Thickness of Loosened Collar in Surrounding Rock of Galleries in Geheyan Project

通过用折射波法和钻孔超声波法对清江隔河岩电站阻滑键深层处理洞群围岩讼动圈的测试，结合其它洞室测试资料，论述了折射波法具有能迅速、准确地测试全洞室各部位围岩讼动圈厚度和未扰动岩体的平均波速，且方法还具有比钻孔超声波法简单易行等优点。并以阻滑键洞群折射波法测试资料为实例，分析了围岩松动圈的分布规律。

By using the refraction wave methed and bore-hole ultrasonic mettiod for detecting the thick-ness of loosened collar in surrounding rock of galleries which are used as the deep-layer slide-resistingkeys,refferring the other observed data,the merits of the refraction method are mentioned,e.g.,itcan guickly and correctly measure the thickness of loosened collar of full surrounding rock and the ave-rage wave speed of undisturbed rock,and is simple in application than the bore-hole ultrasonicmethod。 Using the observed data by refraction wave methed as illustrations,the distribution law of theloosened collar in surrounding rock is analysed。