| 顺向岩质高边坡分级开挖的变形破坏特征研究 |
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| 引用本文： | 刘发祥,;何鹏,;唐升贵.顺向岩质高边坡分级开挖的变形破坏特征研究[J].岩土工程技术,2014(4):193-197. |
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| 作者姓名： | 刘发祥 ;何鹏 ;唐升贵 |
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| 作者单位： | [1]贵州有色地质工程勘察公司,贵州贵阳550005; [2]四川大学水利水电学院,四川成都610065 |
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| 摘 要： | 以岩质高边坡的野外调查成果为基础,分析了边坡的岩体结构特征和控制边坡稳定性的主要地质要素,依据自然边坡的变形破坏现状定性分析,预测边坡开挖过程中可能出现的宏观变形破坏模式和特征.利用基于有限差分原理的FLAC3D建立坝肩边坡的地质模型,对工程边坡开挖支护过程进行数值法定量研究,得出了工程边坡开挖过程中的应力、位移变化规律和边坡岩体破坏特征.研究成果为苗家坝水电站左坝肩的分级开挖施工提供了依据.
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| 关 键 词： | 顺向岩质边坡 分级开挖 变形破坏特征 数值模拟 |
Study on Deformation and Failure Characteristics Caused by Stepping Excavation of High Rock Slope |
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| Institution: | Liu Faxiang,He Peng,Tang Shenggui( 1.Guizhou Nonferrous Geological Engineering Survey Company, Guiyang 550005, Guizhou, China; 2.College of Water Resource ＆ Hydrpower, Sichuan University, Chengdu 610065, Sichuan, China;) |
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| Abstract: | Based on field investigation results of high rock slope,rock mass structure characteristics and the main geolog ical factors affecting stability of rock slope are analyzed.According to deformation and failure characteristics of natural rock slope,qualitative analysis prediction for macroscopic deformation characteristics and the failure model occurring during excava ting rock slope are done.By the FLAC3D software based on the finite difference principle and the geological model of left abut ment slope,a numerical model of left abutment slope is established and stepping process of excavating is carried out by the FLAC3D software as a numerical method.This research obtained the changing law of stress and strain and deformation and fail ure characteristics of rock mass during various excavating stages of engineering slopes.The achievements from this research had guided stepping excavation of left abutment of Miaojiaba hydropower station successfully. |
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| Keywords: | dip rock slope step excavation deformation and failure characteristics numerical simulation |
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