| 极端冰雪条件下边坡稳定性分析 |
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| 引用本文： | 郑长安,巢万里.极端冰雪条件下边坡稳定性分析[J].中南公路工程,2012(3):42-44,72. |
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| 作者姓名： | 郑长安 巢万里 |
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| 作者单位： | 湖南省交通科学研究院,湖南长沙410075 |
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| 基金项目： | 湖南省科技厅资助项目（2009SK3056）; 湖南省交通运输厅资助项目（201161） |
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| 摘 要： | 极端冰雪天气可能造成边坡的稳定性下降。结合算例,分析了极端冰雪天气发生时,各个工况下边坡的稳定性。首先研究了气温开始下降时,边坡内部温度分布规律,并考虑冻融界面的强度损伤,计算了表面土体冻结时边坡的安全系数。接着,针对边坡融化过程,分析了坡面土体部分融化及全部融化后边坡的应力状态,孔隙水压力分布及安全系数。结果表明,边坡开始冻结和融化时,都能造成边坡的稳定性下降,但其发生原因和机理略有不同。
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| 关 键 词： | 边坡工程 极端冰雪天气 冻融界面 强度损伤 |
Slope Stability Analysis Under Extreme Snow Weather |
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| ZHENG Changan,CHAO Wanli.Slope Stability Analysis Under Extreme Snow Weather[J].Central South Highway Engineering,2012(3):42-44,72. |
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| Authors: | ZHENG Changan CHAO Wanli |
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| Institution: | (Hunan Conmmunication Research Institute,Changsha,Hunan 410075,China) |
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| Abstract: | The stability of the slope reduced when extreme ice snow weather happens.Based on the example,the stability of the slope under different operating conditions is analyzed.First,the law of the temperature in slope is studied when the air temperature start to reduce and the safety factor of the slope is calculated considering the strength damage on freezing-thawing surface.What＇s more,the distribution of stress,pore pressure and the safety is analyzed when the freezing soils is thawed partly and totally.The result shows that the stability reduces when the slope freezes and thaws with different mechanism. |
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| Keywords: | slope engineering extreme ice snow weather freezing-thawing strength damage |
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