公路隧道大型振动台抗减震模型试验方案设计

西藏某隧道隧址区地震烈度高，受多条活动断层影响，为了确保隧道抵御强震和减小活动断层对隧道的影响，对该隧道进口段大型振动台模型试验方案进行研究。首先介绍振动台模型试验模型箱的设计，并对整个模型体系模拟的范围和相似关系进行剖析。然后，在参照已有研究成果并结合本次试验拟定的相似关系基础上，确定模拟模型岩层和模型衬砌的材料。同时，以该隧道进口段数值模拟结果为基础，选择振动台模型试验测点的布置位置。最后，结合隧址区所处的地震环境，编制模型试验的加载制度。最终试验现象证明，本次试验方案是成功的。

Design of Test Plan for Aseismic Model of Large-size Vibration Table in Highway Tunnel

Some tunnel in Tibet has high seismic intensity and is affected by multiple active faults. In order to ensure resistance of the tunnel to strong earthquakes and reducing the impact of active faults on the tunnel, this paper investigates the test plan for large-size table model in the entry section of the tunnel. Firstly the paper introduces the design of test model casing for vibration table model, and analyzes the scope and similarity relation to be simulated by the whole model system. Secondly the paper determines rock strata of simulating model and lining materials for model by reference to the existing research achievements in combination with the similarity relation drawn up in this test. In the meantime the paper selects the arrangement positions of measuring points of the vibration table model test based on the results of numerical simulation in the entry section of the tunnel. Finally the paper compiles the loading system of the model test in combination with the seismic environment around the tunnel location. The final test phenomena prove that this test plan is successful.