强震区黏滑断层隧道刚柔相济抗减震技术模型试验研究

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (5) : 194-200.

论文

崔光耀1，李鹏宇1，王明年2,3，朱长安4

作者信息 +

Model tests for safety of stick-slip fault tunnel in strong earthquake area using rigid-flexible combined anti-shock absorption technology

CUI Guangyao1, LI Pengyu1, WANG Mingnian2,3, ZHU Chang’an4

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文章历史 +

摘要

为研究强震区黏滑断层隧道刚柔相济抗减震技术，依托都汶高速龙溪隧道F8黏滑断层段，开展了静力断层黏滑错动试验和大型三方向六自由度强震震动试验，通过对试验数据的分析，主要研究了上下盘隧道结构的纵向应变、接触压力和内力。试验结果表明：施设减震缝后，沿纵向隧道结构纵向应变及接触压力增加倍数由剧烈变化变为较均匀变化；采用结构加强抵抗断层黏滑错动和强震震动对隧道结构的影响，效果有限；通过施设减震缝抵抗断层黏滑错动和强震震动的影响，效果明显，隧道结构纵向应变抗减震效果97%以上，接触压力抗减震效果86%以上，安全系数最小值增加5倍以上；强震区黏滑断层隧道采用刚柔相济抗减震措施进行设防，可大幅提高隧道结构的安全性，安全系数最小值增加8倍以上。研究成果可为强震区黏滑断层隧道抗减震设防设计提供参考。

Abstract

In order to study using rigid-flexible combined anti-shock absorption technology for safety of stick-slip fault tunnel in strong earthquake area, a model was fabricated based on F8 stick-slip fault segment in Longxi tunnel of Duwen super highway in Sichuan Province, static stick-slip dislocation tests and large 3-direction 6-DOF strong shock tests were conducted for the model.The test data was analyzed and used to study longitudinal strain, contact pressure and internal force of upper and lower tunnel structure.The test results showed that after setting shock absorption gap, increase multiple of longitudinal strain and contact pressure along longitudinal tunnel structure varies from severely to more uniformly; effect of taking tunnel structure-strengthening measures is limited for resisting stick-slip dislocation and strong earthquake shock; effect of setting shock absorption gap is obvious for resisting stick-slip dislocation and strong earthquake shock; anti-shock absorption effect of tunnel structure’s longitudinal strain is more than 97%, the anti-shock absorption effect of contact pressure is more than 86% and the minimum value of safety factor is increased more than 5-fold; using rigid-flexible combined anti-shock absorption technology for a stick-slip fault tunnel in strong earthquake area can greatly improve its safety, the minimum value of its safety factor can be increased more than 8-fold; the study results can provide a reference for the shock absorption fortification design of stick-slip fault tunnels in strong earthquake area.

导出引用

崔光耀1，李鹏宇1，王明年2,3，朱长安4. 强震区黏滑断层隧道刚柔相济抗减震技术模型试验研究[J]. 振动与冲击, 2020, 39(5): 194-200

CUI Guangyao1, LI Pengyu1, WANG Mingnian2,3, ZHU Chang’an4. Model tests for safety of stick-slip fault tunnel in strong earthquake area using rigid-flexible combined anti-shock absorption technology[J]. Journal of Vibration and Shock, 2020, 39(5): 194-200

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