| 大断面连拱隧道暗挖工法数值模拟研究 |
| Numerical Simulation Study on Subsurface Excavation Method of Large Cross section and Multi arch Tunnel |
| 投稿时间：2013-03-18 |
| 中文关键词:双连拱隧道 施工工法 有限元法 平面应变 沉降槽 |
| 英文关键词:double arch tunnel construction method finite element method plane strain settlement trough |
| 基金项目:铁道部科技研究开发计划（2009G006 A） |
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| 中文摘要: |
| 浅埋双连拱隧道开挖分部及支护措施繁多，围岩与结构相互作用关系复杂，地表沉降及围岩变形特性与经典沉降槽理论相差较大，工法选择以经验判断为主。针对上述问题，以石家庄六线隧道下穿既有石太直通线双连拱隧道为工程背景，运用有限元分析软件，建立平面应变数值仿真模型，分析三种工法条件下围岩应力、塑性区发展、支护结构内力及地表沉降的特征及规律，为以后类似的工程设计及施工提供借鉴、参考。 |
| 英文摘要: |
| For shallow double arch tunnels, plenty of excavation steps and supports are often required, resulting in complex interactions between surrounding rocks and structure, and ground displacements somewhat deviate from the results of classical settlement trough theory, so the selection of construction method always depends on engineering experiences. In view of the above problems, based on the project of Shijiazhuang six lane double arch tunnel going under Shijiazhuang Taiyuan railway, plane strain finite element method is adopted to simulate three kinds of construction methods, and the results of rock stresses, plastic zone distributions, supporting member forces and ground surface settlement are studied to reveal the characteristics and differences among three methods. Valuable conclusions are obtained for future reference in similar shallow double arch tunnel projects. |
| 李怀鉴,张桂扬.大断面连拱隧道暗挖工法数值模拟研究[J].石家庄铁道大学学报(自然科学版),2013,(2):51-55,66. |
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