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青岛胶州湾海底隧道地质条件复杂,发育有多组高陡倾角断层,因此隧道在通过海域段涌水断层时的安全便成了工程建设过程中的关键问题.而隧道地震波法(tunnel seismic prediction,TSP)超前地质预报系统作为近年来应用于隧道超前地质预报中较成熟的手段,具有预报距离长、对断层破碎带反映敏感、易于操作、对施工影响小等优势.文中作者应用TSP超前地质预报系统对胶州湾海底隧道f2-1含水断层进行了探测,对TSP系统所采集到的数据进行分析,得出深度偏移、反射层提取图、预报结果2D视图显示与岩体物性图和预报结果3D视图等成果,从而判定了f2-1断层发育的规模与位置,从成果图中提取并统计了断层带内裂隙发育的数量、长度等参数,为超前预注浆加固提供了参数,并对开挖后的地质情况进行了地质编录,验证了本方法的准确性与有效性.
The geological conditions of the Qingdao Jiaozhou Bay Cross-Harbor Tunnel are complicated and there are many sets of high-steep-dip faults. Therefore, the safety of the tunnel when it passes through the water gushing fault has become a key issue in the construction process. The tunnel seismic prediction (TSP) As a more mature method applied in advanced geological prediction of tunnel in recent years, advanced geological prediction system has many advantages, such as long prediction distance, sensitive to fault fracture zone, easy operation and little impact on construction.The authors use TSP advanced geological prediction system The f2-1 water cut of the Jiaozhou Bay submarine tunnel was probed and the data collected by the TSP system were analyzed. The depth migration, the reflection layer extraction map, the 2D view of the prediction result, the physical property map of the rock mass and the prediction result 3D Views and other results to determine the f2-1 fault size and location of development from the results of the map extracted from the fracture and the statistics of the number of fractures in the length and other parameters to provide advanced pre-grouting reinforcement parameters and open After digging the geological conditions of the geological catalog to verify the accuracy and effectiveness of the method.