孔内声波CT技术在软土地区地下溶洞调查中的应用

摘要

孔内声波CT探测技术在近年来已在工程地质勘探中得到较好应用.介绍了声波法的工作原理、孔内声波CT技术系统的测量方式、数据采集和数据预处理以及CT正反演的基本方法.以无锡地区岩体内溶洞调查为实例,阐述了利用该方法探测岩溶发育程度、溶蚀现象发育情况,沿竖向各切面内孔洞空间布置.结果显示孔内声波CT对查明目标体的位置和圈定目标体的形态是有效的.证明其具有开发潜力和应用前景.%The borehole sonic tomography exploring technique has been applied in engineering geological exploration in recent years. The basic principle of the borehole sonic tomography technique, the measurement system, the data preprocessing method and the basic method of sonic speed tomography are introduced.Taking the survey of underground cave in Wu'xi area as example.lt is described that how to use this technique for surveying the spatial distribution shape and corrosion situation of the caverns in detail. It is indicated that the technology of borehole sonic computer tomography is an effective method used on survey of underground cave and also has great potential of development.