跨孔地震CT技术在工程勘察中的应用

Application of Cross-hole Seismic CT Method in Engineering Investigation

跨孔地震CT技术是利用地下介质弹性波速度差异,通过弹性波在地下介质中的旅行时的差异及能量的变化,选择合适的算法反演刻画地下结构和位置,该技术在工程勘察中能够有效地探测土洞和溶洞发育分布情况。论文结合跨孔地震CT技术的应用现状,简述了跨孔地震CT技术的原理,总结了跨孔地震CT技术在实际应用中的技术关键,并将跨孔地震CT技术应用到桥梁基础勘察中,为桥梁的设计和施工提供了充分的地球物理依据。

The cross-hole seismic CT technique takes advantage of the velocity difference of elastic wave of underground media.Through the changes of travel time and energy of elastic wave in underground media,it describes underground structure and location by appropriate inversion algorithm technology,which can effectively detect the development and distribution of soil cave or karst cave in engineering investigation.Based on the application status of cross-hole seismic CT technique,this paper makes a brief introduction of cross-hole seismic CT principle and concludes the key technologies in the practical application of cross-hole seismic CT.This paper applies cross-hole seismic CT technique to bridge foundation survey,which provides sufficient geophysical basis for bridge design and construction.