| 基于强度折减法的顺层路堑边坡土钉墙支护结构稳定性分析 |
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| 引用本文： | 周太全,华渊.基于强度折减法的顺层路堑边坡土钉墙支护结构稳定性分析[J].岩土力学,2008,29(Z1):417-420. |
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| 作者姓名： | 周太全 华渊 |
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| 作者单位： | 江南大学 环境与土木工程学院，江苏 无锡 214122 |
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| 摘 要： | 将非线性有限元分析和极限分析相结合形成强度参数折减有限元法，可以灵活地分析强度不均匀顺层路堑边坡支护结构稳定性问题。将岩体力学理论、非线性有限元分析技术和强度折减系数法相结合，对顺层岩体路堑边坡稳定性进行分析。在对密集假设节理有限元模拟中，假设节理在岩体内连续分布，采用连续介质力学方法建立密集分布节理岩体材料模型。采用强度折减系数法计算岩体结构安全系数，建议采用给定的岩体强度参数计算节理岩质边坡开挖、支护完毕后的内力，再逐渐降低岩体强度参数进行岩体边坡非线性有限元分析，直至岩体边坡达到极限状态，从而求出岩质边坡安全系数。采用该方法对渝怀铁路梅江河右岸DK409+989.4～DK410+020段顺层路堑边坡土钉墙支护结构稳定性进行分析，分析结果表明：采用土钉墙支护后的节理边坡塑安全系数为2.3，支护后的岩质边坡处于稳定状态；土钉墙潜在破裂面为岩体弹性区和塑性区的交界面，与测试得到的各排土钉拉力最大值位置一致。
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| 关 键 词： | 节理岩体 岩体结构 岩质边坡 稳定性分析 强度折减系数 非线性有限元 |
| 收稿时间： | 2008-07-25 |
Stability analysis of layered cutting slope soil nailing support structure based on strength reduction method |
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| ZHOU Tai-quan,HUA Yuan.Stability analysis of layered cutting slope soil nailing support structure based on strength reduction method[J].Rock and Soil Mechanics,2008,29(Z1):417-420. |
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| Authors: | ZHOU Tai-quan HUA Yuan |
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| Institution: | School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China |
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| Abstract: | The rock mass structure of jointed rock slope dominates the slope deformation and stability.To assure the safety of the layered rock slope,the analysis method combined the rock mechanics theory,nonlinear finite element analysis and strength reduction factor method is proposed to analyze the stability of the jointed rock slope by using soil nailing structure.In the nonlinear finite element modeling for jointed rock slope with dense joints,assuming the joints distribute evenly in the rock,dense distribution j... |
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| Keywords: | jointed rock mass rock mass structure rock slope stability analysis strength reduction coefficient nonlinear finite elements |
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