高密度电法和瞬态瑞利波法在长江沿岸滑坡探测中的综合应用

Comprehensive application of high density resistivity method and transient Rayleigh wave method to survey landslides along the Yangtze River

在滑坡防治工作中,通常需要查清滑坡面或滑坡带一定深度范围内滑动面的具体位置、整个滑坡带地下含水性、岩土层结构、裂隙发育等情况。通常采用钻探法解决这些问题,但钻探法成本高、且只能通过钻探资料推断钻孔间的地质情况。而物探方法物理测点数多、且具有体积效应,能更为真实地反映实际的地质情况。本文基于高密度电法的低阻响应较明显、瑞利波法的低速度介质响应也较明显等优点,以重庆开县康家咀滑坡实测部分资料为例,通过钻探法、高密度电法、瞬态瑞利波法资料之间的对比分析,验证了高密度电法和瞬态瑞利波法综合应用于长江沿岸滑坡探测的有效性。

In working for preventing and controlling landslide,the specific location of the slip surface,the underground water content,the structure of rock and soil,the crack growth of the landslide with a certain depth range in landslide zone should often be known. Usually,the drilling method is used to solve these problems. But it has the high cost,and it can only through the borehole data to judge the inferred geological conditions. While,geophysical method has many physical points and has the volume effect,and can reflect the actual geological conditions more objectively. For the advantages that the low resistance response is obvious in the high density resistivity method and low speed dielectric response is obvious in Rayleigh wave method,taking the Kangjiazui landslide in Chongqing as the example,it demonstrates the effectiveness of the high density resistivity method and transient Rayleigh wave method to detect the landslides along the Yangtze River by using the comparative analysis of the data from the drilling,the high density resistivity method and the transient Rayleigh wave method.