| 软弱岩体中圆形隧道挤压变形临界应变研究 |
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| 引用本文： | 温森,张建伟.软弱岩体中圆形隧道挤压变形临界应变研究[J].长江科学院院报,2010,27(2):42-45. |
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| 作者姓名： | 温森 张建伟 |
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| 作者单位： | 河南大学,土木建筑学院,河南,开封,475004;河海大学,岩土力学与堤坝工程教育部重点实验室,南京,210098;河南大学,土木建筑学院,河南,开封,475004 |
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| 基金项目： | 国家“十一五”科技支撑项目(2006BAB04A06) |
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| 摘 要： | 预测隧道挤压程度对设计者至关重要，因此对挤压状态临界应变的研究是很必要的。由于软弱岩体中Q或RMR岩体分类使用效果欠佳，引入GSI代替Q或RMR，并在前人的基础上推导了圆形隧道发生挤压变形的临界应变公式。采用工程实例进行了验证，计算结果符合实际观测结果。最后，依据Hoek－Brown强度准则推导了静水压力状态下圆形隧道挤压变形的临界应变解析表达式。对于埋深很深的隧道，侧压系数近似为1，因此可以采用推导的解析解确定隧道挤压状态。
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| 关 键 词： | 隧道 挤压状态 软弱岩体 临界应变 Hoek-Brown强度准则 静水压力状态 |
Critical Strain of Circular Tunnel Squeezing Deformation in Weak Rock Mass |
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| WEN Sen,ZHANG Jian-wei.Critical Strain of Circular Tunnel Squeezing Deformation in Weak Rock Mass[J].Journal of Yangtze River Scientific Research Institute,2010,27(2):42-45. |
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| Authors: | WEN Sen ZHANG Jian-wei |
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| Affiliation: | 1.School of Civil Engineering and Architecture;Henan University;Henan Kaifeng 475004;China;2.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering;Hohai University;Nanjing 210098;China |
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| Abstract: | It's very important to predict the squeezing level of a tunnel for designer,so it's necessary to study the critical strain of squeezing state.The use of Q and RMR can't get ideal effect in weak rock mass,so GSI is introduced to replace the Q and RMR.The formula of critical strain is deduced based on other research results.An engineering example is used to demonstrate the formula and the calculated result is consistent with the practically observed result.In the end,according to Hoek-Brown strength criterion... |
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| Keywords: | tunnel squeezing state weak rock mass critical strain Hoek-Brown strength criterion hydrostatic pressure state |
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