TSP断层模型数值模拟

发布时间：2018-06-04 11:43

本文选题：TSP + TSPwin　；参考：《吉林大学学报(地球科学版)》2015年06期

【摘要】：隧道在施工开挖中会遇到各种地质问题,其中以断层和软弱带居多,目前隧道地质预报主要采用TSP(tunnel seismic prediction)系统进行。虽然TSP技术应用广泛,但目前对它的研究工作主要集中于工程应用实例,采用正演模拟方法进行的研究较少。笔者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断层对隧道地震波场传播的影响,并对含断层模型的时间记录进行了反演处理,得到了数值模型的速度云图和反射层位图。数据处理结果表明:采用TSP Win软件默认值处理得到的速度云图与模型设定的断层位置一致;根据反射层位图,对异常速度带的层状模型来说,P波预报的准确性更高。研究表明,TSP系统具有良好的抗噪性能。通过对工程实例的处理,验证了数值模拟所得结论。
[Abstract]:The tunnel will encounter various geological problems in the construction and excavation of which fault and weak zone are the majority. At present the tunnel geological prediction is mainly carried out by TSP(tunnel seismic prediction system. Although the TSP technology is widely used, the research work is mainly focused on the engineering application examples, and the forward simulation method is seldom used. The author uses finite element method to simulate tunnel seismic wave field, combines wave field snapshot and time record to study the influence of fault on tunnel seismic wave field propagation, and carries on inversion processing to time record with fault model. The velocity cloud map and the reflection layer bitmap of the numerical model are obtained. The data processing results show that the velocity cloud map processed by default value of TSP Win software is consistent with the fault location set by the model, and the prediction accuracy of P wave is higher for the stratified model with abnormal velocity band according to the reflection layer bitmap. The research shows that the tsp system has good anti-noise performance. The numerical simulation results are verified by processing the engineering examples.
【作者单位】：西南交通大学地球科学与环境工程学院;中铁西北院科学研究院有限公司;四川农业大学土木工程学院;
【基金】：国家自然科学基金项目(40874051,51508358)
【分类号】：U452.1;P631.4

【参考文献】