| 预应力锚索对岩质边坡加固效应的数值模拟 |
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| 引用本文： | 郑筱彦.预应力锚索对岩质边坡加固效应的数值模拟[J].华中科技大学学报(自然科学版),2011(7):118-122. |
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| 作者姓名： | 郑筱彦 |
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| 作者单位： | 武汉理工大学土木工程与建筑学院;中铁建设集团有限公司; |
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| 基金项目： | 国家自然科学基金资助项目(50874085,20974204); 广东省科技计划资助项目(63123) |
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| 摘 要： | 针对预应力锚索加固岩质边坡稳定性分析与评价问题,应用FLAC 3D建立了双滑面楔形体边坡模型,模拟了边坡边开挖、边锚固的施工过程及室内模型的超载破坏试验,分析了锚固岩体的位移和应力、节理裂隙面位移随工况的变化以及锚索预应力损失等问题.研究结果表明:预应力锚索加固作用提高了边坡整体的稳定性;分析边坡的整个破坏过程可知边坡的变化过程为柔性变化,而不是刚性变化;从锚索预应力变化情况可知锚索自上而下进入屈服状态,不同部位的锚索受力有先后、大小之分,呈不均匀分布;对锚固后边坡安全系数进行计算,计算结果与模型试验得出的结果相近.
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| 关 键 词： | 边坡工程 岩质边坡 双滑面楔体 节理岩体 预应力锚索 数值模拟 |
Numerical simulation of reinforcement of rock slopes by prestressed anchor cables |
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| Zheng Xiaoyan.Numerical simulation of reinforcement of rock slopes by prestressed anchor cables[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2011(7):118-122. |
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| Authors: | Zheng Xiaoyan |
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| Institution: | Zheng Xiaoyan1,2(1 School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China,2 China Railway Construction Group Co.Lat.,Beijing 100040,China) |
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| Abstract: | Based on the conclusion of research present state of the reinforcement mechanism of the pre-stressed anchorage cables for slope,a dual-sliding surface wedge slope model was established with help of FLAC 3D to analyze and evaluate the stability of the rock slope.The construction process of anchoring while excavating and the overloading damage of indoor model test were simulated.As to verify and comply analysis for the indoor model test,the displacement and stress of anchorage rock mass and joints crack surfa... |
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| Keywords: | slope engineering rock slope wedge-shaped rock with double sliding surface jointed rock mass prestressed anchor cable numerical analysis |
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