| 某水电站导流隧洞开挖与衬砌过程数值模拟研究 |
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| 引用本文： | 赖小玲,陈艺南,王世梅.某水电站导流隧洞开挖与衬砌过程数值模拟研究[J].三峡大学学报(自然科学版),2010,32(1):10-13. |
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| 作者姓名： | 赖小玲 陈艺南 王世梅 |
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| 作者单位： | 1. 三峡大学,三峡库区地质灾害教育部重点实验室,湖北,宜昌,443002
2. 东南大学,交通学院,南京,210008 |
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| 摘 要： | 利用大型通用有限元软件ANSYS对潘口水电站导流隧洞开挖与衬砌过程进行数值模拟.隧洞开挖与衬砌采用ANSYS软件中的生死单元来实现,开挖与衬砌过程中的每一步荷载的施加均采用存储应力的方法来实现.衬砌跟进时间分别采用两种极端情况:(1)将隧洞部分岩体开挖后,待变形稳定后再加衬砌;(2)隧洞岩体开挖后,不允许变形,立即衬砌,也即边开挖边衬砌.这两种极端情况下的计算结果前者偏于安全、后者偏于危险,实际工程中隧洞开挖后的最佳支护时间应介于二者之间.故在两种计算结果的基础上结合工程实际情况和经验,对潘口水电站导流洞洞身段围岩及衬砌稳定进行评价,以期为实际隧洞工程设计提供依据.
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| 关 键 词： | 导流隧洞开挖 应力释放 卸荷变形 衬砌 数值模拟 |
Numerical Simulation of Processes of Excavation and Lining of a Diversion Tunnel |
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| Lai Xiaoling,Chen Yinan,Wang Shimei.Numerical Simulation of Processes of Excavation and Lining of a Diversion Tunnel[J].Journal of China Three Gorges University(Natural Sciences),2010,32(1):10-13. |
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| Authors: | Lai Xiaoling Chen Yinan Wang Shimei |
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| Institution: | Lai Xiaoling1 Chen Yinan2 Wang Shimei1(1.Key Laboratory of Geological Hazards in Three Gorges Reservoir Area of Education Ministry,China Three Gorges Univ.,Yichang 443002,China,2.Transportation College,Southeast Univ.,Nanjing 210008,China) |
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| Abstract: | The numerical simulation of the processes of excavation and lining of a diversion tunnel of Pankou Hydropower Station has been conducted by using finite element software ANSYS.The excavation and lining of the tunnel is simulated with the birth-death elements;and the load in every step is applied by storing stress method.And lining time is determined based on two extreme cases: one is the moment that the deformation of tunnel is completed after excavation;the other is the time when tunnel is excavated and no... |
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| Keywords: | tunnel excavation stress release unloading deformation lining numerical simulation |
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