基于井间电阻率成像的城市地铁溶洞探测方法  

Detection method of karst caves in city subway based on the cross-hole resistivity tomography

作　　者：张文俊[1] 李术才[1] 苏茂鑫[1] 薛翊国[1] 邱道宏[1] 

机构地区：[1]山东大学岩土与结构工程研究中心,山东济南250061

出　　处：《山东大学学报（工学版）》2014年第3期75-82,共8页Journal of Shandong University（Engineering Science）

基　　金：国家重点基础研究发展计划(973计划)资助项目(2013CB036002);国家自然科学基金重点资助项目(51139004);山东大学自主创新基金资助项目(2012TS061)

摘　　要：针对在城市修建地铁时可能遇到的一种严重危害工程安全的地质灾害体——溶洞,建立了4种典型溶洞模型,使用有限元法和迭代法进行正反演数值模拟,得到井间电阻率成像方法对典型溶洞的探测响应特征,分析总结不同模型响应特点,辅以大连地铁工程实例验证实际探测中的良好应用效果。研究结果表明,井间电阻率成像方法是城市地铁溶洞探测的一种有效的方法,可为城市地铁施工提供相应的安全保证,基于数值模拟和工程实践对在城市地铁使用井间电阻率成像方法进行溶洞探测提出现场工作和数值处理建议。Karst caves were serious potential threats to the construction of subway.Four kinds of karst caves models were built and the numerical simulation were put forth by using the finite element and iteration method.The typical response characteristics were obtained to cross-hole resistivity tomography method of the models, and the response features were analyzed and summarized.Project cases in Dalian subway verified its favourable application effect in practice.Research results proved that cross-hole resistivity tomography method was an effective technology to karst cave detection and could help to ensure the safety of subway construction.Finally, based on numerical simulation and project cases, a few recommendations were given both in working method and data processing when using cross-hole resistivity tomography method to detect karst caves.

关 键 词：井间电阻率成像 数值模拟 城市地铁 溶洞探测 工程实例 响应分析 

分 类 号：P319.32[天文地球—固体地球物理学]