跨断层隧道设置常规抗减震措施振动台试验研究

doi:10.13722/j.cnki.jrme.2014.10.011

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Abstract Shaking table tests were conducted to simulate the anti-seismic and damping measures on tunnel structures across faults. The fault-crossing tunnel structures with an absorbing joint，with a seismic resistant layer and without any damping measures were investigated respectively for comparisons by analyzing the seismic acceleration responses of surrounding rock，the seismic strain responses and the post-seismic destructive patterns of tunnel structures. The new type of dislocation device used in the single model box was proved to be capable to simulate the faults movement perfectly and to be able to help the shake table to exert the nonuniform seismic wave excitation. The absorbing joint reduced the strain values of tunnel structures by allowing the dislocation of the linings. The forced vibration and the seismic strains of tunnel structures due to the constraint of surrounding rock were reduced by the buffering of the seismic resistant layer. The seismic resistant layer was found to better than the absorbing joint. But the effect of these two measures were to be fully displayed，the strength of the lining concrete must be raised accordingly. The arch shoulder，the arch springing and the invert arch of the tunnel were found to be the vital parts for reinforcements.

Key words： tunnel engineering anti-seismic and damping measuresshaking table tests fault-crossing tunnel segments damage patterns

Received: 12 December 2013

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.10.011 OR https://rockmech.whrsm.ac.cn/EN/Y2014/V33/I10/2047

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