| 基于非线性有限元的孟底沟拱坝数值模拟研究 |
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| 引用本文： | 林 聪,杨 强,王海波,李仁鸿.基于非线性有限元的孟底沟拱坝数值模拟研究[J].岩土力学,2016,37(9):2624-2630. |
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| 作者姓名： | 林 聪 杨 强 王海波 李仁鸿 |
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| 作者单位： | 1. 清华大学 水沙科学与水利水电工程国家重点实验室，北京 100084；2. 中国电建集团 成都勘测设计研究院有限公司，四川 成都 610072 |
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| 基金项目： | 国家重点基础研究发展973项目（No.2015CB057904）；国家自然科学基金（No.11572174）；水沙科学与水利水电工程重点实验室项目（No.2016-KY-02）。 |
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| 摘 要： | 孟底沟水电站是雅砻江中游第5个梯级电站，最大坝高200 m，所处位置地质条件复杂，保证其蓄水后良好的工作性态及整体稳定性对工程安全至关重要。通过建立孟底沟拱坝三维有限元模型，基于变形加固理论，分析了拱坝在正常工况和超载条件下位移变化、塑形区扩展规律及大坝整体稳定性。结果表明：孟底沟拱坝现设计方案的位移和超载稳定能力均能达到稳定要求。拱坝贴脚的设置显著降低了坝体和基础的塑性余能，对工程整体稳定性有利。对右岸f4断层两种置换处理方式的对比分析发现，浅表置换加洞井网格置换的处理方式对拱坝整体稳定性更为有利。
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| 关 键 词： | 孟底沟拱坝 有限元分析 整体稳定 变形加固理论 |
| 收稿时间： | 2016-02-13 |
Numerical simulation of Mengdigou arch dam based on nonlinear finite elements |
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| LIN Cong,YANG Qiang,WANG Hai-bo,LI Ren-hong.Numerical simulation of Mengdigou arch dam based on nonlinear finite elements[J].Rock and Soil Mechanics,2016,37(9):2624-2630. |
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| Authors: | LIN Cong YANG Qiang WANG Hai-bo LI Ren-hong |
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| Institution: | 1. State Key Laboratory of Hydroscience and Hydraulic Engineering, Tsinghua University, Beijing 100084, China; 2. Power China, Chengdu Engineering Corporation Limited, Chengdu, Sichuan 610072, China |
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| Abstract: | Mengdigou Hydropower Station is the fifth cascade hydropower station in Yalong River’s middle reaches. Due to the maximum dam height of 200 m and complex geological conditions, it is of significant importance for engineering safety to ensure the dam’s good workability and global stability after impounding. Based on deformation reinforcement theory (DRT), a 3D finite element model of Mengdigou is built to analyze the behavior of the dam’s displacements, plastic zones extension and global stability under both normal and overloading conditions. The results show that the displacements and overloading capacity meet the stability requirement. The introduction of fillet significantly reduces the plastic complementary energy of both the dam and base, which is beneficial to the global stability. Two ways of replacement treatment for f4 fault are investigated. It turns out to be more favorable using shallow replacement together with grid replacement for the dam’s global stability. |
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| Keywords: | Mengdigou arch dam finite element analysis global stability deformation reinforcement theory |
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