| 高速公路连拱隧道开挖三维稳定性分析 |
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| 引用本文： | 陈永辉,;吴继敏,;彭建忠,;陈显春.高速公路连拱隧道开挖三维稳定性分析[J].地震学刊,2009(1):71-76. |
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| 作者姓名： | 陈永辉 ;吴继敏 ;彭建忠 ;陈显春 |
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| 作者单位： | [1]河海大学岩土工程研究所,南京210098; [2]河海大学科学研究院,南京210098; [3]金丽温高速公路永嘉鹿城段工程建设指挥部,浙江温州325106 |
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| 摘 要： | 通过对金丽温高速公路蛘湾连拱隧道工程区的地质特征的详细分析和现场调查，系统研究了蝉湾隧道开挖及加固全过程的围岩应力场、变形场的状况及变化特征。结果表明，蝉湾连拱隧道围岩应变率较高，围岩衬砌后的位移值比未衬砌时减小了50％，采用目前的衬砌类型后，衬砌变形将较大幅度地变小，衬砌应变值基本满足要求；虽然围岩拉应力值随着隧道的开挖逐渐变大，除局部位置外，衬砌整体基本满足抗拉的要求。
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| 关 键 词： | 连拱隧道 开挖 稳定性分析 数值模拟 |
Stability Analysis of 3D Excavation of Doubled Arch Tunnels in Highway |
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| Institution: | CHEN Yong-hui, WU Ji-min, PENG Jian-zhong, CHEN Xian-chun (1. Research Institute of Geoteehnical Engineering, Hohai University, Nanjing 210098, China; 2. Scientific Research Institute, Hohai University, Nanjing 210098,China Construction Headquaters of Yongjia-lucheng Section of Jinliwen Highway, Wenzhou 325106, China) |
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| Abstract: | The geological characteristics on discontinuity plane of Yangwan doubled arch tunnel in Jinliwen highway is investigated and analyzed in this paper. Surrounding rock stress field and displacement field during excavation and consolidation in Jinliwen highway Yangwan doubled arch tunnel are researched guantitatively. The result shows that strain ratio of surrounding rock is high in Yangwan tunnel, and displacement decreases by fifty percent after liner. It testified that the linear type satisfy surrounding rock displacement. Tension stress is bigger than the first excavation. Anti-tension of linearity is satisfactory except at some location. |
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| Keywords: | double arch tunnel excavation stability analysis numerical simulation |
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