| Q2黄土中隧道断面扩大开挖优化分析 |
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| 引用本文： | 杨博闻,付刚.Q2黄土中隧道断面扩大开挖优化分析[J].雁北师范学院学报,2011,27(4). |
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| 作者姓名： | 杨博闻 付刚 |
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| 作者单位： | 重庆交通大学管理学院,重庆,400074 |
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| 摘 要： | 黄土强度低、抗扰动性差，在其中进行隧道施工时，采用不同的开挖步骤直接影响着其施工的安全、效率及稳定性控制效果。通过对Q2黄土中原有隧道断面扩大开挖过程的数值模拟，以应力、位移等为指标，分析不同的开挖顺序对隧道结构稳定性影响的优劣性，进而确定合理的开挖顺序，以降低施工风险，优化断面扩大开挖效果，并得出隧道扩挖对围岩影响的规律。
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| 关 键 词： | Q2黄土 隧道断面扩大 扰动应力场 开挖优化 稳定性 |
Optimization of Section Expansion Stages of Tunnel in Q2 Loess |
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| YANG Bo-wen,FU Gang.Optimization of Section Expansion Stages of Tunnel in Q2 Loess[J].Journal of Yanbei Teachers College,2011,27(4). |
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| Authors: | YANG Bo-wen FU Gang |
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| Institution: | YANG Bo-wen,FU Gang(School of Management,Chongqing Jiaotong University,Chongqing,400074) |
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| Abstract: | When building a tunnel in loess, the structure is usually less stable. Different excavation steps makes crucial impacl on the safety, efficiency and the stability control effect of construction. This paper based on the simulation of section expansion stages in Q2 loess, and analysis of different effects on tunnel structure produced by different excavation sequence in stress, displacement and other aspects. According to the analysis results, select a reasonable excavation sequence in order to reduce the risk and optimize the seetion expansion consequent and summarize some rules. |
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| Keywords: | Q2 loess expansion of tunnel section stress field disturbance optimal tunneling stability |
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