摘要
地下洞室开挖后,地应力重新分布,在洞室围岩周围形成一定深度的松动区,松动区深度的确定对评价围岩稳定性和指导洞室支护设计都具有重意义。利用围岩超声波测试成果和施工期位移监测成果,通过对比分析确定出某洞室围岩松动区的深度范围,为选择合理的围岩支护参数提供依据。
The excavation of the underground chamber causes the redistribution of the geostress, and certain thickness of the disturbed zone produced surrounding rockmass. It is important to measure out the thickness of the disturbed zone for evaluating the stability of the surrounding rockmass and designing the support of tunnel. Comparing the results of supersonic test with the results of monitoring the displacement during the construction, the scope of the tunnel wall rocks disturbed zone can be measured,and the fit parameters is offered for support of the wall rocks.
出处
《岩土工程技术》
2009年第1期44-47,共4页
Geotechnical Engineering Technique
关键词
围岩松动区厚度
声波测试
位移监测
thickness of the disturbed zone
ultrasonic test^displacement monitoring
