TSP隧道地震预报空洞模型的数值模拟研究  

Numerical Simulation of TSP Tunnel Cave Model of Seismic Prediction

作　　者：王朝令[1] 杨茜[1] 陈章[1] 杨文[1] 

机构地区：[1]四川农业大学土木工程学院,都江堰市建设路288号611830

出　　处：《大地测量与地球动力学》2016年第11期998-1002,共5页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(51508358)~~

摘　　要：采用有限元方法模拟隧道地震波场,采用波场快照与时间记录相结合的方法,研究空洞对隧道地震波场传播的影响,并对含空洞模型的时间记录进行处理,得到数值模型的速度云图和反射层位图。经数据处理表明,采用TSPwin设定默认值处理得到的速度云图与模型设定的空洞位置比较一致,在提取反射层位图上,空洞反射层呈现条带状特征,需要结合速度云图来确定空洞位置,且P波预报的准确性相对较高。对TSP系统的抗噪性进行研究,表明其具有良好的抗噪性能。最后通过对工程实例的处理,验证了数值模拟所得的结论。Tunnel excavation encounters a variety of geological challenges,such as faults,caves,etc.Currently tunnel seismic prediction adopts TSP,which is used widely,but research about TSP is currently focused on its engineering application examples.In this paper,we use the finite element method to simulate the tunnel seismic wave field,employing wave field snapshots and combined time recording methods to study the impact of caves on the characteristics of the propagation of seismic wave field tunnel.We also employ inversion processing of the time record of the model containing the cave.We compare our method with the velocity scattered image and reflection interface position,velocity processing with the default values set by using TSPwin.The results are good for tunnel seismic velocity cave layered model with single prediction,and have a higher prediction accuracy of the P-wave.Finally,we process and analyze engineering examples to verify the numerical simulation the conclusions.

关 键 词：TSP TSPwin 空洞 波场快照 隧道地震预报 

分 类 号：P315[天文地球—地震学]