地下洞群主厂房边墙裂缝带监测与研究  

Study and Monitoring on the Side Wall Fracture Zones of the Main Power House in Underground Cavern Groups

作　　者：孙林锋[1] 朱维申[2] 张乾兵[2] 马庆松[2] 

机构地区：[1]福州市勘测院,福州350000 [2]山东大学岩土与结构工程研究中心,济南250061

出　　处：《地下空间与工程学报》2010年第3期543-547,共5页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金资助项目(90510019)

摘　　要：在我国,许多已建或在建的水电站地下洞群工程中经常发现洞室高边墙有陡倾角脆性劈裂带或大裂缝。为了探究大型地下厂房边墙裂缝带的分布情况、发育程度和形成原因,作者以瀑布沟工程地下厂房群为研究对象,在4号母线洞两侧的岩柱打了四个贯穿于主厂房与主变室的观测钻孔,采用钻孔电视成像仪和数字式全景钻孔摄像系统进行观测,得到主厂房下游边墙的裂缝分布状况。观测结果表明,大角度裂隙带的较密集部位,主要出现在距主厂房下游边墙约10m-15m和30m-35m范围之间的岩柱内,且随着时间的推移裂缝条数逐渐在增多。In China,many underground cavern groups have been built or are under construction.There were brittle and steep dip angle splitting fracture zones frequently found in the high side wall of the cavern groups.Based on the underground cavern group in Pubugou hydroelectric power station,this paper used the borehole televiewer and the digital panoramic borehole camera system to monitor the four boreholes,which were on both sides of the No.4 busbar chamber and between the main power house and the transformer house,to study the distribution,growth and formation of the fracture zone in the high side wall of the cavern groups.The distribution of the fracture zones was obtained by the monitoring.The monitoring results show that the steep dip angle fracture zones was mainly found inside the rock specimen,of which the depth was 10~15 m and 30~35 m from the downstream side wall of the main cavern.The number of the steep dip angle fractures was increasing by the time.

关 键 词：地下洞室群 裂缝带 现场观测 

分 类 号：TU476.4[建筑科学—结构工程]