花岗岩隧道地震响应机理及减震技术探析

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (10) : 149-156.

论文

花岗岩隧道地震响应机理及减震技术探析

陈庆1，郑颖人2，3，陈剑杰1

作者信息 +

Discussion and analysis of seismic responses and aseismic measures of Granite Tunnel under earthquake effect

Chen Qing1,2, Zheng Yingren2,3, Chen Jianjie1

Author information +

文章历史 +

摘要

利用FLAC3D软件对花岗岩隧道的地震响应机理及泡沫混凝土减震层的减震效果进行了分析。通过对比塑性区范围、围岩应力场分布、应变增量以及衬砌结构内力等指标，得出了一些有益的结论：泡沫混凝土减震层能有效降低围岩中的最大主应力，并改善岩体中的应力场分布，使最大主应力出现的部位远离隧道临空面；其次，减震层还大幅降低了衬砌结构的轴力。该结论可为花岗岩隧道抗震设计提供一定的参考。

Abstract

The mechanics of seismic responses of granite tunnel and the aseismic effectiveness of cellular concrete are studied using FLAC3D software. By analyzing plastic zone, stress field, strain increment of surrounding rock and the inner force of liner, some useful solution are concluded: buffer layer of cellular concrete can effectively reducing the maximum principal stress of surrounding rock and even make the position where the maximum principal stress occurrence far away from the tunnel. Then the inner force of the liner is reduced wide-range by setting the buffer layer. These results provide some references for seismic design of granite tunnel.

导出引用

陈庆;郑颖人;陈剑杰. 花岗岩隧道地震响应机理及减震技术探析[J]. 振动与冲击, 2013, 32(10): 149-156

Chen Qing;Zheng Yingren;Chen Jianjie. Discussion and analysis of seismic responses and aseismic measures of Granite Tunnel under earthquake effect[J]. Journal of Vibration and Shock, 2013, 32(10): 149-156