水压力对填石路堤稳定性的影响  

Influence of water pressure on the stability of rock fill embankment

作　　者：杨成忠[1] 杨平[1] 

机构地区：[1]南京林业大学土木工程学院

出　　处：《生态环境》2008年第2期828-833,共6页Ecology and Environmnet

基　　金：江西省科技厅科研项目(0636001000475)

摘　　要：基于极限平衡理论和Ordinary方法,采用Geo-slope软件分析了不同临界水位时水压力对高填石路堤稳定性的影响。结果表明:填石路堤稳定性系数随着临界水位的降低而增大。对于干沟高填石路堤,当临界水位低于路肩52m时,水压力对路堤稳定性的影响可以忽略不计。在最低临界水位时的稳定系数为1.371,满足有关规范的要求。在最高临界水位时,稳定系数为0.921,比低水位时降低了32.8%,路堤的稳定性降低,且稳定系数不能满足有关规范的要求。因此,在进行填石路堤设计或施工时必须考虑水压力对其稳定性的影响,采取相应的工程措施保证路堤安全。Based on limiting equilibrium theory and Ordinary method, applying Geo-slope software, the influence of water pressure at different critical level on the stability of rock fill embankment is analyzed. The result present that： The stability factor of rock fill embankment increases with the decrease of the critical level. For Gangou high rock fill embankment, the influence can be left out of consideration when the critical level lies below 52 m than the shoulder. The stability factor of embankment is 1.371 at low water level and can meet the standard. The stability factor is 0.921 at high water level. It decreases 32.8% than that at low water level. The stability becomes poor and the stability factor can＇t meet the standard. Therefore, the influence of water pressure on the stability of rock fill embankment should be considered while it is designed or in construction and engineering measures must be taken to ensure embankment＇s safety.

关 键 词：高填石路堤 稳定性 水压力 Ordinary法 极限平衡理论 Geo-slope 

分 类 号：U416.1[交通运输工程—道路与铁道工程]