综合物探法在滑坡稳定性评价中的应用研究

Application of comprehensive geophysical prospecting method in stability evaluation of landslide

滑坡是最严重的自然地质灾害之一,产生条件复杂,受各种自然地质因素影响,其稳定性评价和治理方案选择中经常利用物探方法来获取相关地质信息。近年来越来越多的工程实践发现单一的物探方法均有信息不够准确、直观等局限性,综合物探法以其全面、快速、信息丰富等特点从而得到广泛应用,对滑坡治理方案的选择具有重大意义。以兰渝铁路盖家阴山滑坡为例,结合滑坡勘察资料,借助高密度电法和瑞利面波法进行综合物探勘查,获取其速度和电阻率等参数,进一步确定滑坡的滑动面、深度及滑动范围,认识滑坡的变形破坏发展过程与规律,为滑坡的治理方案的确定提供有力证据。

Landslide is one of the most serious natural geological disasters. Its production condition is complicated, and it is influenced by various natural geological factors. For its evaluation of stability and selection of treatment scheme, the geophysical exploration method is often used to get the related geological information. In recent years, more and more engineering practices indicate that the single geophysical exploration method has the limitations such as inaccurate and intuitive information. The comprehensive geophysical prospecting method is widely used for its characteristics of comprehensive, rapid and rich information, and it is of great significance to selection of treatment scheme for the landslide. Based on Gaijiayin Mountain landslide on Lanzhou-Chongqing and combined with the landslide survey data, using the high-density resistivity method and the integrated geophysical exploration of the Rayleigh surface wave method the parameters such as velocity and resistivity are obtained, and the scope of the landslide slip surface, depth and sliding are further determined. The deformation, failure, development process and the relevant laws are understood so as to provide powerful evidence for the scheme determination of landslide governance.