摘要
黄土高原滑坡灾害频发,严重影响着当地人民的生命财产安全.分析滑坡体稳定性,预防及治理滑坡灾害需要查明滑坡形态特征.近年来,高密度电法作为常规的物探方法来确定滑坡的地质结构和水文条件,已经成为滑坡现场探测的一种便捷技术.本文以宝鸡市中岩山滑坡为例,运用高密度电法探测不同深度地层的电阻率值,通过钻探将电阻率与含水率建立关系,结合反演得到的高密度电法剖面与钻孔岩性资料及地质调查资料,弥补了单纯依靠钻孔信息来确定地层结构及滑移面形态的不足,查明了中岩山滑坡的黄土泥岩地层结构、黄土厚度、富水区分布、滑移面空间特征,构建了详细准确的三维地质模型.实践证明,电阻率能够很好地反应研究区的地质结构与水文特征.从而为滑坡形成机制分析提供依据,同时也给其他类似区域地质调查中的滑坡稳定性评价及预测预报工作提供技术参考.
Landslide disasters occur frequently in the Loess Plateau, seriously affecting the safety of local people’s lives and property. Analyzing the stability of the landslide body, preventing and treating landslide disasters, it is necessary to find out the morphological characteristics of the landslide. In recent years, as a conventional geophysical method to determine the geological structure and hydrological conditions of landslides, the high-density electrical method has become a convenient technique for on-site landslide detection. In this paper, taking the Zhongyanshan landslide in Baoji City as an example, the high-density electrical method is used to detect the resistivity values of formations at different depths, the resistivity and water content are established through drilling, and the high-density electrical method profile obtained by inversion is combined with the lithology of the borehole. The data and geological survey data make up for the lack of relying solely on borehole information to determine the stratum structure and slip surface shape, ascertaining the loess-mudstone stratum structure, loess thickness, water-rich area distribution, and slip surface space of the Zhongyanshan landslide Features, construct a detailed and accurate three-dimensional geological model. Practice has proved that the resistivity parameter can well reflect the geological structure and hydrological characteristics of the study area. This provides a basis for the analysis of the formation mechanism of landslides, and also provides technical reference for landslide stability evaluation and prediction work in other similar regional geological surveys.
作者
刘栋
张帆宇
陈立
杨桑杰
梁昌玉
辛鹏
王涛
LIU Dong;ZAHNG FanYu;CHEN Li;YANG SangJie;LIANG ChangYu;XIN Peng;WANG Tao(College of Civil Engineering and Mechanics,Lanzhou University,Lanzhou 730000,China;lnstitute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China)
出处
《地球物理学进展》
CSCD
北大核心
2022年第4期1742-1748,共7页
Progress in Geophysics
基金
国家自然科学基金(41977212,41927806)
渭河中上游城镇灾害地质调查(DD20190717)
兰州大学中央高校基本科研业务费专项资金(lzujbky-2021-ct04,lzujbky-2021-sp08)联合资助。
关键词
黄土滑坡
高密度电法
水文地质模型
三维建模
Loess landslide
Electrical resistivity tomography
Hydrogeological model
3D modeling
