不同埋深矩形隧道地震响应的离心振动台试验

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Abstract Dynamic centrifuge tests of seismic response of rectangular tunnels in sandy silt are performed. Three experiments are conducted，including free-field test，shallow tunnel test and deep tunnel test. Dynamic behaviour of the soil and tunnel is presented，including soil acceleration at different depths，soil displacement in the horizontal direction，settlement of the ground surface and dynamic strain of tunnels in the transverse direction. Effect of the presence of tunnel on site earthquake response as well as the difference of seismic response of tunnels at different buried depths are analyzed through contrasting the three sets of experimental data. It is concluded that the maximal seismic deformation occurs at four corners of the tunnel，presence of the tunnel changes the dynamic property of site，and seismic response of the deep tunnel is larger than that of the shallow one.

Key words： tunnelling engineering rectangular tunnels earthquake dynamic centrifuge test soil-structure interaction different buried depths

Received: 18 July 2012

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/3404

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