用地电阻率探测和监测滑坡体实验  

Experiments on exploring and monitoring landslip-mass using geoelectric resistivity observations

作　　者：安金珍[1] 周平根[2] 马麦宁[3] 陈峰[1] 董颖[2] 钟沛林[4] 

机构地区：[1]北京大学地球与空间科学学院,中国北京100871 [2]中国地质环境监测院,中国北京100081 [3]中国科学院研究生院地球科学学院,中国北京100049 [4]四川省地质环境监测总站,中国成都610000

出　　处：《地震学报》2008年第3期254-261,328,共8页Acta Seismologica Sinica

基　　金：国家自然科学基金创新群体项目(40521002);国家自然科学基金项目(40774047)资助

摘　　要：实验采用高密度电阻率方法探测滑坡体的电性结构,用电阻率变化各向异性方法监测滑坡体的主破裂扩展方向和速率.实验结果为:①电性结构探测实验,验证了部分原勘测的滑坡体的蠕变体边界和地下水层的深度和厚度,以及上层介质的性质.证明滑动带富含地下水层;②用电阻率变化各向异性监测实验确定的测点主破裂扩展方向,与滑坡体GPS位移推断的破裂带方向吻合,且电阻率变化各向异性系数的变化速率与钻孔倾斜仪测量的滑坡体深部位移变化的速率相应.In the experiments, a high-density resistivity method is used to explore the electric structure of landslip mass, and a resistivity-changing anisotropy method is used to monitor the orientation and speed of main fracture extending of landslip mass. The results are as follows. （1） The exploring experiments have verified a part of creep deformation borderline, the depth and thickness of groundwater horizon, and the property of superstrata in the landslip mass investigated formerly, which have proved that the landslip belts contain rich groundwater; （2） The main fracture extending orientation inferred from the resistivitychanging anisotropy accords with the strike of fracture belt of landslip mass deduced from GPS displacement. Moreover, the changing rates of resistivitychanging anisotropy coefficient matches with the changing speeds of deep displacement of landslip mass were measured by suing clinometer in the borehole.

关 键 词：地电阻率 电阻率各向异性 地质灾害 滑坡 

分 类 号：P315.722[天文地球—地震学]