| 基于强度折减法小净距隧道合理净距的研究 |
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| 引用本文： | 张永兴,胡居义,何青云,王桂林.基于强度折减法小净距隧道合理净距的研究[J].水文地质工程地质,2006,33(3):64-67. |
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| 作者姓名： | 张永兴 胡居义 何青云 王桂林 |
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| 作者单位： | 1. 重庆大学土木工程学院,重庆,400045
2. 四川省泸州市一三五岩土工程有限公司,泸州,646000 |
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| 基金项目： | 重庆市高等学校优秀中青年骨干教师资助计划 |
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| 摘 要： | 小净距隧道合理净距的确定是目前研究的热点和难点.影响小净距隧道合理净距的因素很多,解析法虽然可以得到精确解,但是公式烦琐,而数值计算方法可以计算各种情况下围岩的应力、变形、塑性区分布等情况.小净距隧道合理净距的确定也即是隧道稳定性发生突变时两独立隧道最小距离的确定.提出了合理净距确定的原则,并采用强度折减弹塑性有限元方法,针对某工程实例,计算了在不同净距情况下隧道的安全系数,并把安全系数发生突变时的净距作为合理净距,和传统有限元分析的结果相吻合.
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| 关 键 词： | 有限元 强度折减法 小净距隧道 |
| 文章编号： | 1000-3665（2006）03-0064-04 |
| 收稿时间： | 2005-10-12 |
| 修稿时间： | 2005-11-02 |
On rational clear spacing of tunnel with small clear spacing based on strength reduction technique |
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| ZHANG Yong-xing,HU Ju-yi,HE Qing-yun,WANG Gui-lin.On rational clear spacing of tunnel with small clear spacing based on strength reduction technique[J].Hydrogeology and Engineering Geology,2006,33(3):64-67. |
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| Authors: | ZHANG Yong-xing HU Ju-yi HE Qing-yun WANG Gui-lin |
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| Institution: | 1. Faculty of Civil Engineering, Chongqing University, Chongqing 400045, China ; 2.135 Geotechnical Engineering Co., Luzhou City of Sichuan Province, Luzhou 646000, China |
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| Abstract: | Tunnel with small clear spacing is a hotspot and difficult problem. Many factors affect the optimized spacing of tunnel with small clear. Numerical method can consider all kinds of factors. The rational spacing is the nearest distance between two tunnels when catastrophe. The principles of determining the optimized spacing are proposed. Using strength reduction elastoplastic FEM and taking some project as example, the paper calculates the safety factors at different spacing and takes the distance as the optimized spacing when catastrophe, which is consistent with the traditional FEM result. |
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| Keywords: | finite element strength reduction technique tunnel with small clear spacing |
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