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进行了硬质土层中隧道结构的地震响应离心模型试验。研究了密实土层中,不同强度地震荷载作用下场地与隧道结构的响应。采用层状剪切箱,研究了边界条件对土体与隧道响应的影响。同时进行了自由场地震响应模拟试验,研究了隧道结构的存在对周围土体地震响应带来的影响。研究结果表明:隧道与地基土的地震响应与地震强度和边界条件密切相关,隧道地震响应特征与静力状态存在明显差异,并且由于隧道的存在对于周围土层的地震响应(加速度、侧向位移、地表沉降等)存在显著影响。
The seismic response centrifugal model test of tunnel structure in hard soil is carried out. The response of site and tunnel structure under the action of earthquake with different intensities is studied in the dense soil. The influence of boundary conditions on the response of soil and tunnel was studied by using layered shear box. At the same time, a free-field earthquake response simulation test was carried out to study the influence of the tunnel structure on the seismic response of the surrounding soil. The results show that the seismic response of tunnel and subsoil is closely related to the seismic intensity and boundary conditions. There are significant differences between the seismic response characteristics of the tunnel and the static state, and the seismic response (acceleration, lateral displacement , Surface subsidence, etc.) have a significant impact.