| 滑坡稳定性分析点安全系数法的应用条件 |
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| 引用本文： | 杨涛,马惠民,代杰,杨延鑫.滑坡稳定性分析点安全系数法的应用条件[J].西南交通大学学报,2011,46(6):966-972. |
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| 作者姓名： | 杨涛 马惠民 代杰 杨延鑫 |
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| 作者单位： | 1. 西南交通大学土木工程学院,四川成都,610031
2. 中铁西北科学研究院,甘肃兰州,730000 |
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| 基金项目： | 国家自然科学基金资助项目(50808149); 中央高校基本科研业务费专项基金资助项目(SWJTU09CX007); 西南交通大学“竢实之星”项目的资助 |
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| 摘 要： | 为探索适用于点安全系数法的滑坡发展阶段,通过算例对点安全系数法与刚体极限平衡法进行了比较研究,详细分析了影响点安全系数的各种因素.结果表明:计算点安全系数的应力状态是滑带岩土体刚开始全部处于塑性流动状态,即点安全系数法的应用条件是滑坡启动阶段.此时,二维条件下计算的整体安全系数与二维刚体极限平衡法计算的安全系数吻合；而在三维条件下,计算结果符合“滑带抗剪强度参数降低K倍,滑坡的安全系数也降低K倍”的强度储备理念.
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| 关 键 词： | 滑坡 滑动机制 点安全系数 数值计算 |
Application Condition of Point Safety Factor Method for Stability Analysis of Landslide |
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| YANG Tao
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MA Huimin
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DAI Jie
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YANG Yanxin.Application Condition of Point Safety Factor Method for Stability Analysis of Landslide[J].Journal of Southwest Jiaotong University,2011,46(6):966-972. |
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| Authors: | YANG Tao MA Huimin DAI Jie YANG Yanxin |
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| Institution: | YANG Tao 1,MA Huimin 2,DAI Jie 1,YANG Yanxin 1(1.School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China,2.Northwest Research Institute Company Limited of China Railway Engineering Corporation,Lanzhou 730000,China) |
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| Abstract: | To determine the landslide stage for suitable application of the point safety factor method,calculational results obtained using this method and the rigid-body limit equilibrium method were analyzed and compared,and factors influencing point safety factor were analyzed.The results show that the beginning stage of the plastic flow state of sliding zone is suitable to the use of point safety factor,so the applicable condition of the point safety factor method is the critical state of sliding beginning.At the ... |
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| Keywords: | landslide sliding mechanism point safety factor numerical computation |
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