弹性波CT法在岩溶勘察中的应用研究

Application Research of Elastic Wave CT Method in Karst Exploration

发育于灰岩地区的地下隐伏岩溶给城市工程建设带来了极大的安全隐患,常规物探手段难以满足城市工程对岩溶病害的高精度探测要求。介绍一种弹性波CT技术,可以对工程场地地下结构进行高精度成像,依据岩溶与其周围围岩之间存在的物性差异,结合场地其他地质资料对场区岩溶的形态、规模进行准确预测。工程实践表明,弹性波CT法能够准确识别地下隐伏岩溶,与地质钻探资料相吻合。

The underground hidden karst developed in the limestone area has brought great safety hazards to urban engineering construction.Conventional geophysical prospecting methods are difficult to meet the high-precision detection requirements of urban engineering for karst diseases.This research introduced a cross-hole elastic wave CT technology,which can perform high-precision imaging of the underground structure of the engineering site.In combination with other geological data of the site,the shape and scale of the karst in the site area can be accurately predicted.The technology was applied in project practice,and the results show that the elastic wave CT method has achieved accurate identification of underground hidden karst,which is consistent with the geological drilling data.