基于离散单元法的白鹤滩水电站复杂块体稳定性分析

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摘要节理岩体边坡块体稳定性分析是岩体力学工程实践中关心的一个重要问题，经典极限平衡理论在求解复杂块体稳定时具有诸多的限制。基于离散单元法作为运行平台，推导复杂块体安全系数计算公式，并在此基础上编制复杂块体稳定性分析程序，能够弱化复杂地形、材料非线性以及初始地质条件等传统问题的约束；继而运用2种经典块体模型对该程序进行正确合理性验证。最终将程序应用于白鹤滩左岸边坡复杂块体稳定性分析研究，给出关键块体安全系数及其潜在破坏模式，并根据块体稳定性特征及其变形模式给出加固建议。该研究结果对岩体边坡复杂块体稳定性研究具有一定指导意义。

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关键词 ：水利工程, 岩体边坡, 复杂块体, 离散单元法, 安全系数

Abstract：The stability analysis of complicated block in jointed rock mass slope has been a critical concern in rock mechanics research of rock mass behaviors and engineering practice. There are some limitations in theory of classical limit equilibrium method(LEM) to this problem. In this paper，the formula for calculating safety factor of complicated block has been derived；and a relative specialty program has been compiled based on distinct element method(DEM). In contrast to LEM，there are no relative limitations to complicated geologic features，nonlinear behavior of rock mass and ground conditions. Two classical block failure problems have been performed to verify the rationality and correction of the program. Finally，the program is employed into the study of complicated block stability analysis of Baihetan hydropower station. The result shows the complicated block potential failure model and safety factor. Based on the calculation production above，some reinforcement suggestions are proposed for designers. The study in this paper advises certain point of view for stability analysis of complicated block.

Key words： hydraulic engineering rock mass slope complicated block distinct element method safety factor

收稿日期: 2011-05-19

引用本文:

朱永生1，朱焕春1，石安池2，孟国涛1. 基于离散单元法的白鹤滩水电站复杂块体稳定性分析[J]. 岩石力学与工程学报, 2011, 30(10): 2068-2075.
ZHU Yongsheng1，ZHU Huanchun1，SHI Anchi2，MENG Guotao1. COMPLICATED BLOCK STABILITY ANALYSIS OF BAIHETAN HYDROPOWER STATION BASED ON DISTINCT ELEMENT METHOD. , 2011, 30(10): 2068-2075.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/I10/2068

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