氡气测试技术在边坡稳定性研究中的应用  

Application of radon measurement to the evaluation of slope stability

作　　者：王小群[1] 游敏[2] 

机构地区：[1]地质灾害防治与地质环境保护国家重点实验室(成都理工大学),成都610059 [2]安徽建筑工业学院土木工程学院,合肥230022

出　　处：《成都理工大学学报（自然科学版）》2010年第5期574-578,共5页Journal of Chengdu University of Technology: Science & Technology Edition

摘　　要：采用氡气测试技术方法对四川峨眉观音岩滑坡分布区进行了测试,结果显示,原定的滑坡边界处氡气值总体偏高,在滑坡区内,两级滑坡平台的边缘处氡气值也显著偏高,据此确定了滑坡前缘剪出口位置。同样也采用了氡气测试方法对雅砻江锦屏坝址区边坡平硐进行了测试,根据测试结果并结合声波测试结果对边坡岩体结构进行了分带,将边坡岩体分为:卸荷拉裂变形带、紧密挤压带、拉裂破裂密集带与完整板梁交替出现带。氡气测试可以作为一种辅助手段为边坡研究提供更多分析资料,只是在应用中要注意排除地下水、干燥剂、潮湿等的干扰。To study slope stability is the focus of engineering geological research.The commonly used research methods include engineering geological survey and drilling,stress testing,acoustic testing,and flat adit CT etc.The radon testing technology has not been widely adopted in slope stability study.Radon measurement method is used to test the Guanyinyan landslide distribution area.The test results show that the radon value on the original boundary of the landslide is generally high.In the landslide area,the value of radon is significantly high on the edge of the second grade landslide platform,and the leading edge of the landslide shear zone is identified to the west of the road.The same method is also used to test the slope adit of the Jinping dam site.According to the test results,the bank-slope adit rock mass structure is zoned.The slope rock is divided into the unloading tension deformation zone,close compressive zone,rupture dense zone and complete plate girder zone.Through its application to two projects,the landslide boundary identification and the zoning of the bank-slope adit rock mass structure,it is proved that the radon testing technology can be well used as a complementary method to provide more analysis data and thus provide solid scientific support for the slope stability study.The device used in this method is portable and easy to operate,and low cost.It must be noted to exclude the interferences from groundwater,desiccant and humidity when in use.

关 键 词：氡 测试技术 边坡 稳定性 

分 类 号：TU457[建筑科学—岩土工程]