隧道地质灾害地震波探测的高阶有限差分模拟研究  

A Staggered-grid High-order Difference Method for Modeling Seismic Wave Propagation in Tunnel Disaster Detection

作　　者：鲁光银[1] 韩旭理[1] 朱自强[1] 何现启[1] 曹书锦[1] 

机构地区：[1]中南大学,长沙410083

出　　处：《铁道工程学报》2008年第3期73-77,共5页Journal of Railway Engineering Society

基　　金：交通部西部科技项目(200231800021);湖南省自然科学基金资助项目(05SK3077)

摘　　要：研究目的:研究隧道施工中不良地质灾害体反射波法探测机理问题。研究结果:采用吸收边界和加阻尼边界的方法,边界反射基本上达到完全吸收的效果;采用交错网络的高阶有限差分计算,能够直观、准确的反映出非均匀岩层、溶洞、软弱夹层等隧道复杂构造和不良地质灾害体的地震波传播特征。Research purposes： The researches are done on the exploration mechanism of seismic reflection method to the geological disaster during tunnel construction in karst area. Research results： Results show that by the hybrid method of the absorbing boundary and the nonreflecting boundary, the boundary reflection may be absorbed completely, and by the staggered -grid high -order difference method, the simulated result is very efficiently and precisely. The snap shots of wave - filed and its characters of seismic wave propagation for the complex heterogeneous media, karst cave, weak interlayer are very directly and exactly.

关 键 词：隧道 灾害 数值模拟 岩溶 高阶有限差分 

分 类 号：U457[建筑科学—桥梁与隧道工程]