Seismic damage of mountain tunnels during the 5.12 Wenchuan earthquake

Seismic damage of mountain tunnels during the 5.12 Wenchuan earthquake
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5.12汶川地震山岭隧道震害分析

DOI:
10.1007/s11629-016-3878-6
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发表时间:
2016-10
影响因子:
2.5
通讯作者:
Zhao Xu
Zhao Xu
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Yu Hai-tao;Chen Jun-tao;Yuan Yong;Zhao Xu

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在2008年中国汶川地震中,一些山岭隧道遭受了不同程度的严重破坏。在隧道入口和隧道内部都观察到了从小到大的裂缝,而靠近断层的一些部分完全倒塌。本文总结了从报告和论文中收集到的关于震中附近55条山岭隧道在地震中的行为的定性数据。在对山岭隧道进行地震调查和资料收集的基础上,将山岭隧道的破坏归纳为开裂、剥落、剪切破坏、错位、路面隆起和坍塌6种最常见的破坏模式。然后对损伤模型进行了详细的研究和讨论。为了考察山岭隧道破坏程度的影响因素,分析了震中距、地震烈度、覆盖层深度、地质条件与破坏程度的相关性。研究了地震参数与不同损伤模型之间的关系。最后,提出了提高山岭隧道抗震性能的建议。
A number of mountain tunnels suffered significant damage to various extent during the 2008 Wenchuan earthquake in China. Damage ranging from small to heavy cracking was observed both at the portal and inside the tunnels, while some sections close to the faults completely collapsed. A summary of qualitative data collected from reports and papers is presented regarding the behavior of the 55 mountain tunnels near the epicenter during the earthquake. Based on the seismic investigation and data collection of mountain tunnels, the tunnel damage is classified into six most common damage models involving cracking, spalling, shear failure, dislocation, pavement uplift and collapse. Detailed study and discussion are then carried out on the damage models. In order to examine the influencing factors of the damage magnitude of the mountain tunnels, the correlations between epicentral distance, earthquake intensity, overburden depth, geological condition and damage levels are analyzed. The relationships between earthquake parameters and different damage models are developed and discussed. Also, suggestions are provided to improve the seismic resistance of mountain tunnels.
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