Assessment of damage in mountain tunnels due to the Taiwan Chi-Chi Earthquake
Assessment of damage in mountain tunnels due to the Taiwan Chi-Chi Earthquake
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DOI：
10.1016/s0886-7798(01)00047-5
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发表时间：
2001-07-01
影响因子：
6.9
通讯作者：
Huang, TH
中科院分区：
文献类型：
--
作者：
Wang, WL;Wang, TT;Huang, TH
隧道作为地下结构，长期以来一直被认为具有承受地震而几乎不受破坏的能力。然而，在台湾中部集集地震后，对山区隧道的调查显示，许多隧道都遭受了不同程度的严重破坏。本文描述了对地震后台湾山区隧道破坏的系统评估结果。调查结果显示，57条隧道中有49条隧道受损。根据衬砌裂纹的特征和分布，总结了衬砌的损伤模式。通过对这些隧道的地质条件、设计文件、施工和维护记录进行系统调查，评估可能影响隧道各种破坏模式和地震荷载的潜在因素。结果表明，隧道的破坏程度与隧道的地质条件和结构布置有关。通过断层位移带的隧道肯定会受到破坏。地质薄弱带的范围、离震中的距离以及是否存在斜坡面也是影响地震强度的重要因素。隧道结构布置、衬砌类型、仰拱设置、衬砌配筋等参数对隧道抗震能力有影响。2001爱思唯尔科学有限公司版权所有。
Tunnels, being underground structures, have long been assumed to have the ability to sustain earthquakes with little damage. However, investigations of mountain tunnels after the Chi-Chi Earthquake in central Taiwan revealed that many tunnels suffered significant damage to various extents. This work describes the findings of a systematic assessment of damage in the mountain tunnels in Taiwan after the earthquake. It was found that among the 57 tunnels investigated 49 of them were damaged. The damage patterns are summarized based on the characteristics and the distribution of the lining cracks. This systematic investigation, involving geological conditions, design documents, construction and maintenance records of these tunnels, has been conducted to assess the potential factors that may have influence on the various damage patterns and the earthquake loading for tunnels. The results show that the degree of damage is associated with the geological condition and structural arrangement of the tunnel. A tunnel passing through a displaced fault zone will definitely suffer damage. The extent of geological weak zones, distance from the epicenter, and the existence of a slope face are also significant influencing factors. The seismic capacity of the tunnel is influenced by its structural arrangement, type of lining, invert setup, lining reinforcement, and other parameters. (C) 2001 Elsevier Science Ltd. All rights reserved.