| TSP断层模型数值模拟 |
| |
| 引用本文： | 林义,刘争平,王朝令,肖缔.TSP断层模型数值模拟[J].吉林大学学报(地球科学版),2015(6):1870-1878. |
| |
| 作者姓名： | 林义 刘争平 王朝令 肖缔 |
| |
| 作者单位： | 1. 西南交通大学地球科学与环境工程学院，成都 610031; 中铁西北院科学研究院有限公司，兰州 730000;2. 西南交通大学地球科学与环境工程学院,成都,610031;3. 四川农业大学土木工程学院,成都,611830 |
| |
| 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。
|
| 关 键 词： | TSP TSPwin 波场快照 隧道地震预报 断层 |
Numerical Simulation of TSP Fault Model |
| |
| Abstract: | During tunnel excavation ,a variety of geological disasters might be encountered ,such as faults ,caves ,et .al . Tunnel seismic prediction (TSP ) is adopted to mitigate the possible damages . Although TSP technology is used widely ,the research about TSP is currently focused on its engineering application cases .We use the finite element method to simulate the tunnel seismic wave field ,employ wave field snapshots and time recording method on the impact of faults on the characteristics of the propagation of tunnel seismic wave field ,and inversely process the time record of model containing the fault .The digital model of the velocity scattered image and the reflection interface position are obtained , and the fault position from velocity scattered image processed with the default values set by using TSPwin is agreed to the one from the model .In respect to the layered model for an abnormal velocity zone ,P‐wave is more precise .The system of TSP is strong for its feature of anti‐noise .The numerical simulation is verified finally through the process and analysis of the engineering cases . |
| |
| Keywords: | TSP TSPwin snapshot tunnel seismic prediction fault |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
