高山峡谷地区桥址区岩溶发育特征地球物理勘察  

Geophysical exploration of karst development characteristics in bridge site ofthe alpine gorge area

作　　者：陆泽峰[1,2] LU Ze-Feng(Nonferrous Metal East China Geological Exploration Bureau of Jiangsu Province,Nanjing 210007,China;Nanjing Survey Engineering Co.,Ltd.,Nanjing 210007,China)

机构地区：[1]江苏省有色金属华东地质勘查局,江苏南京210007 [2]南京勘察工程有限公司,江苏南京210007

出　　处：《物探与化探》2021年第1期252-256,共5页Geophysical and Geochemical Exploration

摘　　要：发育深度、充填物、展布方向等岩溶发育特征是在高山峡谷地区进行桥址区地球物理勘察时需要重点考虑的问题,受风化物、岩层、地下水和地形等因素影响,很难得到满意的地球物理勘察信息。某悬索桥建于岩溶发育的高山峡谷地区,为了提高勘察效率,采用浅层地震、音频大地电磁、对称四极测深3种地球物理勘察方法,勘察精度依次提高,勘察内容相互印证,得到表观、宏观和微观岩溶发育特征。上述地球物理综合勘察方法能为类似地区岩溶发育地球物理勘察提供借鉴。Karst development characteristics such as depth,fillings and distribution direction are key questions during geophysical survey of bridge site in Alpine gorge area.Satisfactory information of geophysical survey is not available due to influences of weathering,rock,groundwater and topography.In order to improve efficiency of geophysical exploration,shallow seismic method,audio frequency magnetotelluric method and symmetric four-pole sounding method are used for raising geophysical exploration efficiency.As a result,exploration accuracy is improved in turn,and content of exploration is verified by each other.Characteristics of apparent,macroscopic and microcosmic Karst development are obtained.Method of geophysical comprehensive exploration mentioned above can provide reference for similar projects.

关 键 词：高山峡谷 岩溶 浅层地震法 音频大地电磁法 对称四极测深法 

分 类 号：P631[天文地球—地质矿产勘探] U442.2[天文地球—地质学]