金沙江其宗水电站坝址深厚覆盖层钻探技术和孔内试验实践  

Drilling Technology and Hole Test Practice for Dam Site Deep Coverage Layer of Qizong Hydropower Station on Jiasha River

作　　者：熊德全[1] 王昆[1] 

机构地区：[1]中国水电顾问集团昆明勘测设计研究院,云南昆明650041

出　　处：《云南水电技术》2009年第1期18-22,共5页

摘　　要：其宗水电站属峡谷区修建的高坝、大库，初拟最大坝高达350m左右。枢纽区河床及阶地分布厚达60～140m深厚覆盖层，其成因复杂，包括冲积、洪积、冰积、泥石流堆积和崩积等多种成因。由于覆盖层厚度大，组成物质均一性差，因此通过钻进技术取出完整岩芯样及原状样，并在钻孔内开展原位测试试验，为分析、研究在深厚覆盖层上建高坝的可行性；适宜性提供可靠的勘探成果具有重要意义。本文对其宗水电站坝址河床及阶地深厚覆盖层的钻探技术及孔内原位测试试验实践进行介绍。Qizong Hydropower Station is high dam and reservoir built in the canyon area. And the biggest dam was preliminarily planned to be as high as about 350m. The riverbed in complex area and terrace were distributed with deep coverage layer as high as 60-140m, having complicated reasons of formation, including alleviation, pluvial sediment, ice accretion, debris flow sediment, and the colluvial, etc. Because the coverage layer is thick, with bad homogeneity of component substances, the complete rock core sample and original sample were taken out through drilling technology, and the in-situ test was carded out in the borehole, having important significance in providing reliable test results for analyzing and researching the feasibility and applicability of on building dam on the deep coverage layer. The paper introduces the drilling technology for the dam site riverbed and terrace deep coverage layer and hole in-situ test practice of Qizong Hydropower Station.

关 键 词：深厚覆盖层 钻进取芯 护壁 原位测试 其宗水电站 

分 类 号：P634.5[天文地球—地质矿产勘探] TU411.3[天文地球—地质学]