| 深埋偏压小净距隧道施工力学特征数值模拟研究 |
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| 引用本文： | 张业民,李文剑,李进才.深埋偏压小净距隧道施工力学特征数值模拟研究[J].力学与实践,2011,33(2):46-51. |
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| 作者姓名： | 张业民 李文剑 李进才 |
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| 作者单位： | 1. 大连交通大学 土木与安全工程学院;2. 广州市人防建筑设计研究院有限公司; |
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| 摘 要： | 以瑞赣高速公路峡山隧道区间为工程背景, 针对小净距双洞并行隧道的复杂
受力状态, 采用有限元法对深埋条件下的小净距段偏压隧道采用不同施工方案进行数值模拟.
对双侧壁导坑法、CD法和上下台阶法等不同的施工方法对围岩应力、围岩变形、锚喷支护体
系结构内力、拱顶位移及围岩稳定性进行对比. 分析不同方案下开挖前、后隧道围岩与支护
结构的位移、应力变化规律. 在此基础上对不同方案施工过程对隧道中间夹岩的力学行为进
行分析, 提出了隧道中间夹岩薄弱面的概念, 更加明确了该工程地质条件下隧道夹岩的薄弱
控制面. 并以此为依据指导工程施工, 在实际施工中取得了较好的效果.
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| 关 键 词： | 深埋偏压 小净距隧道 施工方案 力学特征 数值模拟 |
| 收稿时间： | 2010-10-22 |
NUMERICAL SIMULATION OF DEPTH BIAS OVERWHELMING FORCE TUNNEL CONSTRUCTION |
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| ZHANG Yemin
,
LI Wenjian
,
LI Jincai.NUMERICAL SIMULATION OF DEPTH BIAS OVERWHELMING FORCE TUNNEL CONSTRUCTION[J].Mechanics and Engineering,2011,33(2):46-51. |
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| Authors: | ZHANG Yemin LI Wenjian LI Jincai |
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| Affiliation: | ZHANG Yemin(*,1) LI Wenjian(*,+) LI Jincai(**) (School of Civil and Safety Engineering,Dalian Jiaotong University,Dalian 116028,China) (The First Survey and Design Institute of China Railway,Xi’an 710043,China) (Guangzhou Civil Air Defence Institute of Architectural Design Co.,Ltd.,Guangzhou 510500,China) |
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| Abstract: | Based on the engineering background of Rui-Gan Expressway
Xiashan tunnel, for complex stress state of
two-hole parallel tunnels with small spacing, the finite element
method is used in a small clear distance zone
of a deep tunnel under different bias conditions to simulate the step
construction scheme. The different excavations before and after the
tunnel surrounding rock displacement and support structure and the
stress variation are analyzed. On the basis of different tunnel
construction processes, and the mechanical behavior of rock, the
concept of weak rock is proposed to show clearly the engineering
geological conditions of weak rock tunnel control panel folder,
achieved good results in actual constructions. |
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| Keywords: | Deep bias Tunnel with small spacing Construction plan Mechanical characteristics Numerical simulation |
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