| 地震作用下加筋挡土墙稳定性分析 |
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| 引用本文： | 贾亮,朱彦鹏,来春景.地震作用下加筋挡土墙稳定性分析[J].西南交通大学学报,2016,29(4):697-703. |
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| 作者姓名： | 贾亮 朱彦鹏 来春景 |
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| 作者单位： | 兰州理工大学土木工程学院 |
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| 基金项目： | 国家自然科学基金资助项目(51568044);甘肃省自然科学基金资助项目(1308RJYA023) |
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| 摘 要： | 为了计算地震作用下加筋挡土墙的整体稳定系数,考虑筋带对其稳定性的影响,基于塑性极限理论上限法,选用对数螺旋作为滑动面,建立了地震作用下加筋挡土墙稳定性分析模型.推导了挡土墙后滑动土体重力所作的外功率、地震对滑动土体所作的外功率、潜在滑移面上的土体粘聚力及筋带与土体间摩擦力所作的内功率,建立了稳定系数计算公式.采用遗传算法,计算了地震作用下加筋挡土墙的稳定系数.研究结果表明,考虑筋带加固作用,基于滑移面动态搜索模型计算得出稳定系数为1.337,比用《公路加筋土工程设计规范》中的方法计算得到的稳定系数大0.08,说明稳定性分析时考虑筋带抗滑移作用是合理的.
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| 关 键 词： | 加筋挡土墙 动力稳定性 上限法 |
| 收稿时间： | 2014-02-14 |
Stability Analysis of Reinforced Earth Retaining Wall under Earthquake |
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| JIA Liang;ZHU Yanpeng;LAI Chunjing.Stability Analysis of Reinforced Earth Retaining Wall under Earthquake[J].Journal of Southwest Jiaotong University,2016,29(4):697-703. |
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| Authors: | JIA Liang;ZHU Yanpeng;LAI Chunjing |
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| Affiliation: | JIA Liang;ZHU Yanpeng;LAI Chunjing;College of Civil Engineering,Lanzhou University of Technology; |
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| Abstract: | To calculate the stability factor of reinforced earth retaining wall under earthquake, a stability analysis model was set up based on the upper bound limit theory by considering the effect of the reinforcement strip and selecting the logarithmic spiral as the integral slip surface. The stability factor equation was developed through deduction of the external power made by sliding mass gravity behind the retaining wall, the external power of earthquake on sliding mass, the internal power of soil cohesion of the potential failure surface, and the reinforcement strip on soil friction. The stability factor of reinforced retaining wall under earthquake was calculated using the genetic algorithm. The results show that after considering the reinforcement, the stability factor obtained by the dynamic model of failure surface is 1.337, which is 0.08 higher than the stability factor calculated by the method from Code for Design of Highway Reinforced Earth Engineering. This suggest, taking the anti-sliding effect of reinforcement into accout during the stability analysis is reasonable. |
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