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.
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LU Ze-Feng. Geophysical exploration of karst development characteristics in bridge site of the alpine gorge area. Geophysical and Geochemical Exploration, 2021, 45(1): 252-256.
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