摘要
通过对贵州某电厂场地地处喀斯特地貌区,地下岩溶、破碎带等不良地质体发育勘察查明其分布特征。采用充电法、电阻率联合剖面法、高密度电法联合技术路线,并合理布设测线、优化观测参数,构建多方法互补验证的勘察体系。根据高密度电阻率法精准识别出低阻异常区6处,对应岩溶裂隙与富水破碎带,异常形态边界清晰;充电法大致判断地下水流经路线,联合剖面法大致判断剖面上是否有断层、裂隙等地质体存在及其位置。结合三种方法在场地勘察中的各自优势且互补性强,得出高密度电阻率法对地质体空间分布的分辨力更优,联合剖面法与充电法对含水性与物质成分的识别更精准。联合应用为电厂场地选址、地基处理及工程设计提供了可靠的地质依据,也为喀斯特地区同类工程勘察提供了实践参考。
Through the investigation of the development of unfavorable geological bodies such as underground karst and fracture zones in a power plant site in Guizhou,the distribution characteristics are identified.The combined technical route of charging method,resistivity combined profile method and high-density electrical method is adopted,and the survey line is reasonably arranged,the observation parameters are optimized,and the survey system of multi-method complementary verification is constructed.According to the high-density resistivity method,6 low-resistivity anomaly areas are accurately identified,corresponding to karst fissures and water-rich fracture zones,with clear abnormal morphological boundaries;the charging method roughly determines the route of groundwater flow,and the combined profile method roughly determines whether there are faults,cracks and other geological bodies on the profile and their locations.Combined with the respective advantages and strong complementarity of the three methods in site investigation,it is concluded that the high-density resistivity method has better resolution for the spatial distribution of geological bodies,and the combined profile method and charging method are more accurate for the identification of water content and material composition.The combined application provides a reliable geological basis for site selection,foundation treatment and engineering design of power plant,and also provides a practical reference for similar engineering investigation in karst area.
作者
熊远鹏
王洪
XIONG Yuanpeng;WANG Hong(General Geophysical and Geochemical Team,Nonferrous Metal and Nuclear Industry Geoexploration Bureau of Guizhou Province,Duyun 558000,Guizhou,China)
出处
《吉林地质》
2025年第3期68-73,共6页
Jilin Geology
关键词
联合剖面法
充电法
高密度电法
Combined profiles method
charging method
high density electrical method
