地质雷达空洞探测机理研究及其在隧道应用实例分析  

Research on the Mechanism of Probing Cavity with Ground Penetrating Radar and Analysis on Application Examples of Tunnel

作　　者：郭亮[1] 李俊才[1] 张志铖 徐李鑫 

机构地区：[1]南京工业大学土木工程学院,南京210009 [2]南京南大岩土工程技术有限公司,南京210008

出　　处：《建筑科学》2011年第5期80-84,共5页Building Science

摘　　要：隧道衬砌与围岩之间及塌方区回填注浆体内部的空洞数量和范围受到严格限制,以求最大程度提高隧道整体承载力和密实性,确保工程优质安全。为此简要探讨了地质雷达无损探测空洞的机理,并在云南麻栗坡隧道应用LTD-2100地质雷达对衬砌和塌方区回填注浆体密实性进行检测。对比空洞填修前后的探测结果可知地质雷达探测法具有快速、精确定位空洞并随之有针对性实施钻孔注浆的巨大优势,从而为大型隧道工程开展高效无损检测以期大幅度提高其安全储备及质量等级提拱了强有力手段,同时拓展了地质雷达在地球物理勘探学科中的应用领域。The range and number of cavities between tunnel lining and surrounding rock as well as on the inside of backfill grouting at landslide area are severely restricted,so as to increase the carrying capacity and density of the tunnel and,furthermore,to ensure the quality and safety of the tunnel.To study the mechanism of probing cavities with GPR,the compactness of tunnel lining and backfill grouting at landslide area with GPR of LTD-2100 was detected in Malipo tunnel.After comparing the testing results around filling time,a conclusion is easily drawn that GPR measuring method has obvious advantage of fast and accurate positioning cavities and then grouting is put into effect,which provides us with a superior unscathed method to detect the large tunnel efficiently,so that the security reserve and the quality rating of the tunnel are improved effectively.Meanwhile,these advantages expand the application area of GPR in geophysics exploration.

关 键 词：地质雷达 电磁波 空洞探测 隧道工程 

分 类 号：P631.32[天文地球—地质矿产勘探] TU9[天文地球—地质学]