不同地下水位下考虑降雨和蒸发影响的膨胀土路堤稳定性分析  

Analysis on Stability of Expansive Soil Embankment Under Different Groundwater Level Considering the Impacts of Rainfall and Evaporation

作　　者：张旭东[1] 

机构地区：[1]黑龙江省公路勘察设计院,黑龙江哈尔滨150080

出　　处：《水利与建筑工程学报》2016年第2期212-217,共6页Journal of Water Resources and Architectural Engineering

摘　　要：为了研究不同地下水位、持续蒸发和持续蒸发后连续降雨条件下素土、灰土路堤及整体稳定性,利用Geo Studio软件将非饱和土的渗流模型和考虑非饱和土抗剪强度的GLE法相结合,得出了不同条件下的稳定安全系数。结果表明:稳定安全系数随填筑高度的增大呈现减小的趋势;较之初始状态,持续蒸发状态能使安全系数提高,而连续降雨状态则会使其降低;地下水位2.0 m时的安全系数大于地下水位0.5 m的;灰土路堤和整体的安全系数比素土高;填筑高度4.0 m、6.0 m和8.0 m的素土整体安全系数均不满足规范的要求。In order to study the overall stability of the prime soil, dust embankment under different groundwater levels, continuous rainfall, evaporation evaporation, this research adopted the GeoStudio software which combines the unsaturated soil seepage model and unsaturated soil shear strength GLE to get a safety factor of stability under different conditions. The results showed that： stable safety coefficient increases with the filling height with a decreasing trend; compared to the initial state, the safety factor continued to increase with increasing evaporation, however it will reduce under continuous rainfall; when the water table is 2.0 m, the coefficient is greater than the groundwater level of 0.5 m; dust embankment and overall safety factor is higher than prime soil; filling height of 4.0 m, 6.0 m and 8.0 m overall safety factor of prime soil cannot meet the specifications.

关 键 词：膨胀土 路堤 地下水位 蒸发 降雨 安全系数 

分 类 号：U416.12[交通运输工程—道路与铁道工程]