斜交隧道-土体相互作用体系振动台试验设计

为研究复杂斜交地铁隧道-土体相互作用体系的地震响应规律,系统阐述了交地铁隧道-土体相互作用体系振动台试验中方案设计的关键问题并进行了分析,详细介绍了地震模拟振动台系统、相似比设计原则、模型体系整体布置、传感器布设、试验工况加载方案等试验设备与技术,重点说明了模型土的配制、刚性模型箱的设计及其边界合理性的验证,同时根据远离隧道的中远场测点的加速度响应结果评价配制的模型土的合理性。本次振动台试验可为今后空间交叉地铁隧道-土体相互作用体系的大型振动台试验设计提供借鉴与参考。

Shaking table test design of oblique cross tunnel-soil interaction system

To study the seismic response of the complex oblique crossing subway tunnel-soil interaction system, this study has described and analyzed the key problems in the design of the shaking table test for the subway tunnel-soil interaction system in a systematic manner. Detailed introduction is made about the seismic simulation shaking table system, the design principle of similarity ratio, the overall layout of the model system, the sensor layout, the loading scheme of the test condition, and other test equipment and technology. It is the preparation of model soil, the design of rigid model box and the validation of the boundary rationality that are attached importance to. Meanwhile, the rationality of the model soil was evaluated according to the acceleration response results of the measuring points far from the tunnel. This shaking table test will shed great light for the design of large-scale shaking table for the subway tunnel-soil interaction system in the future.