| 应力剪胀对浅埋偏压隧道破坏面形状的影响 |
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| 引用本文： | 张韬,张家生,王金明.应力剪胀对浅埋偏压隧道破坏面形状的影响[J].浙江交通职业技术学院学报,2009,10(1):21-24. |
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| 作者姓名： | 张韬 张家生 王金明 |
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| 作者单位： | 中南大学土木建筑学院,长沙,410075 |
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| 摘 要： | 采用有限差分软件，对浅埋偏压单线铁路隧道和四车道公路隧道进行数值模拟。研究了围岩的松动土体力学行为，主要考虑应力剪胀对浅埋偏压隧道破坏面形状的影响，并将数值模拟的结果与规范理论解进行了比较。结果表明：剪胀角对浅埋偏压隧道围岩位移和破坏面形状有较大影响。因此，在确定浅埋偏压隧道围岩松动压力时应该考虑剪胀对破坏面形状的影响。
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| 关 键 词： | 剪胀 浅埋偏压隧道 破坏面 破裂角 |
The Influence of Stress Dilatancy on the Shape of the Failure Face for Shallow Bias Tunnel |
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| ZHANG Tao,ZHANG Jia-sheng,WANG Jin-ming.The Influence of Stress Dilatancy on the Shape of the Failure Face for Shallow Bias Tunnel[J].Journal of Zhejiang Vocational and Technical Institute of Transportation,2009,10(1):21-24. |
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| Authors: | ZHANG Tao ZHANG Jia-sheng WANG Jin-ming |
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| Affiliation: | (School of Civil and Architectural Engineering, Central South University, Changsha 410075, China) |
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| Abstract: | Numerical simulation using finite differential code is conducted for single lane railway and four lane road tunnel of shallow bias. Considering the influence of shear dilation on the shape of the failure face for the shallow bias tunnel, the mechanical behavior of loose rock mass is studied, and the result of numerical simulation is compared with the specification solution. The results show that： the dilatancy angle has great influence on the surrounding rock displacement and the shape of failure face for shallow bias tunnel. Therefore, the influence of shear dilation on the failure face should be considered for determining relaxed pressure of surrounding rock for the shallow bias tunnel. |
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| Keywords: | shear dilatation shallow bias tunnel failure face break angle |
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