盾构地铁隧道孤石探测方法及研究展望

Detection Method and Research Prospect of Boulder Detection in Shield Subway Tunnel

针对我国东南沿海地区盾构地铁隧道孤石探测难度较大的问题,介绍了目前常用的孤石探测方法,包括加密钻孔法、地质雷达法、高密度电法、跨孔地震CT法和微动法等。结合若干成功探测案例,总结关键探测经验,分析了各种方法的优缺点和适用条件。为了提高孤石探测的可靠性,采取钻探和物探相结合的方法或多种物探手段相结合的方法对孤石进行定位非常必要。

Aiming at the difficulty of boulder detection in shield subway tunnel in the southeast coastal areas of China,the commonly used boulder detection methods are introduced,including drilling method,geological radar method,high-density electrical method,cross-hole seismic CT method and fretting method.Combined with several successful detection cases,the key detection experiences are summarized,and the advantages,disadvantages and applicable conditions of various methods are analyzed.In order to improve the reliability of boulder detection,it is very necessary to adopt the method of combining drilling and geophysical exploration,or the method of combining multiple geophysical exploration methods to locate the boulders.