Abstract
AbstractWhen building bridges in limestone areas, karst development often affects the quality of piles and bridge safety. Karst development presents diversity, complexity and irregularity. If the development degree characteristics of karst cannot be found out, it will increase great difficulties and potential safety hazards for later construction. In the past, the development degree of karst cannot be completely found out by drilling alone. This requires a combination of geophysical exploration and drilling. Using high-density electrical method, the karst development can be determined according to the inversion abnormal low resistance area. According to the geophysical results and combined with the drilling data, the characteristics of karst development degree can be fully displayed in space, and the design and construction work can be carried out on the basis of accurate and detailed geological data, so as to save the project cost, shorten the construction period and ensure the safety of bridge construction and later operation.KeywordsHigh density electrical methodBridge surveyKarst
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