综合物探方法在船闸岩溶勘察中的应用研究

Research on the Application of Comprehensive Geophysical Methods in Ship Lock Karst Exploration

采用地球物理技术手段查明灰岩地区溶洞发育,是现阶段比较经济有效的技术方法。由于物探方法的局限性以及场地复杂性,单一物探方法进行岩溶探测往往不够全面准确,而使用多种物探方法综合探测,则可以达到理想的探测效果。本文围绕某船闸灰岩地区的岩溶探测,着重介绍反磁通瞬变电磁、弹性波跨孔CT以及管波等三种物探方法,分别从探测面到探测段再到探测点,对地下岩溶进行普查到精探的圈定。三种物探方法从岩溶不同物性参数出发,既可以相互验证也可以相互补充,在某船闸岩溶探测中实际应用,证实综合物探方法岩溶勘察有效性以及准确性,对岩溶区船闸工程勘察具有借鉴意义。

It is an economical and effective technique to find out the characteristics of karst development and distribution in limestone area by means of geophysical technique.Due to the limitation of geophysical prospecting method and the complexity of the site,a single geophysical prospecting method for karst exploration is often not comprehensive and accurate,based on the karst exploration in the limestone area of a shiplock,this paper mainly introduces three geophysical prospecting methods,i.e.,reverse magnetic flux transient electromagnetic method,cross-hole CT method and pipe wave method,the subterranean karst is surveyed from general survey to fine exploration.Based on the different physical property parameters of karst,the three geophysical prospecting methods can be verified and supplemented with each other,the validity and accuracy of the comprehensive geophysical prospecting method for karst exploration are verified,which can be used for reference for Shiplock engineering exploration in karst area.