隧道建设 2011, 31(增刊1) 18-23  DOI:    ISSN: 1672-741 CN: 41-1355/U

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本文关键词相关文章
岩石隧道
受震
衬砌
本文作者相关文章
陈正勋
王泰典
黄灿辉
PubMed
Article by Chen, Z. X.
Article by Wang, T. D.
Article by Huang, C. H.
岩石隧道受震反应之工程影响因子研究
陈正勋1,王泰典2,黄灿辉3
(1.台湾世曦工程顾问公司, 台北; 2.台北科技大学, 台北; 3. 台湾大学, 台北)
摘要: 地震发生频繁区域之岩石隧道受震破坏案例已发生多起,其相关研究课题已日渐受重视,惟土层隧道耐震设计已有规范遵循,岩石隧道者者尚缺乏深入探讨。研究采经岩石隧道震后破坏案例及解析解等验证正确性之动态数值分析模式,探讨岩石隧道受震工程影响因子,包括衬砌刚度、衬砌与岩盘互制、围岩加劲及围岩弱化等。由分析结果知,衬砌劲度越大,震波引致最大应力增量正规化值愈大,即震波引致应力增量值愈大,因此隧道衬砌耐震设计不能全以提高劲度为主要方法;隧道衬砌与岩盘互制作用研究结果显示,采用匀滑开挖、防水膜及衬砌与岩盘填补增加滑动性材料等,可减少衬砌受震引致轴向应力增量,达到减震效果;岩石隧道混凝土衬砌外侧之再加厚衬砌与辅助工法等加劲措施,经采用等值劲度模拟分析结果显示,采用如一次支撑及辅助工法提高围岩劲度,将增加衬砌轴向应力,但减少剪应力及挠曲应力;加大加劲范围可减少衬砌轴向应力,但将增加剪应力及挠曲应力;开挖引致的松动区减少围岩劲度,将减少衬砌轴向应力,但增加剪应力及挠曲应力。
关键词 岩石隧道   受震   衬砌  
Study on Engineering Impact Factors for Rock Tunnels Subjected to Seismic Excitation
CHEN Chenghsun1, Wang Taitien2 ,Huang Tsanhwei3
(1. CECI Engineering Consultants, Inc., Taipei.;2. National Taipei University of Technology, Taipei;3 National Taiwan University, Taipei)
Abstract: Many rock tunnels were damaged due to earthquake. The related subjects are important. This paper tries to figure out influential factors for rock tunnels subjected to seismic excitation. The results show that the greater the lining stiffness is, the greater maximum stress of lining is. That is, it is not suitable to enhance the stiffness as the main seismic design of tunnel lining. For the study about the interaction between tunnel lining and rock mass, the slip behavior between the rock and lining can reduce the stresses and achieve the reduction of seismic action. This study simulates reinforcement measures of rock tunnel such as shotcrete lining and auxiliary methods by the increase of equivalent stiffness of related rock mass. The increase of stiffness of lining will increase the maximum axial stress of the lining, but it will reduce the maximum shear stress and flexural stress. The increase of the area of the reinforced section will decrease the maximum axial stress of the lining, but it will increase the maximum shear stress and flexural stress. On the other hand, loosen area in surrounding rock due to poor excavation will reduce the stiffness. It will decrease the maximum axial stress of the lining, but it will increase the maximum shear stress and flexural stress.
Keywords: rock tunnel   earthquake   lining  
收稿日期 2011-04-15 修回日期  网络版发布日期  
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作者简介: 陈正勋(1964—),男,2011年毕业于台湾大学土木工程学系,博士,现任台湾世曦工程顾问公司正工程师,主要从事岩石力学与隧道研究、设计方面的工作。

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