两侧水位变化时路堤渗流特征及稳定性分析  

Analysis on Seepage Characteristics and Stability of Embankment with Water Level Change on both Sides

作　　者：张俊荣[1] 陈保国[1] 易贤龙[1] 谭钦文[1] 王坤鹏[1] ZHANG Jun-rong CHEN Bao-guo YI Xian-long TAN Qin-wen WANG Kun-peng(Faculty of Engineering, China University of Geosciences, Wuhan Hubei 430074, Chin)

机构地区：[1]中国地质大学(武汉)工程学院,湖北武汉430074

出　　处：《公路交通科技》2017年第2期35-41,共7页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(51108434);黄土地区公路建设与养护技术交通行业重点实验室开放课题项目(KLTLR-Y13-5)

摘　　要：以两侧有水的浸水路堤为研究对象,采用岩土计算软件Geo-studio分别分析了不同填土材料、单侧和双侧水位降低、不同水位降低速率、不同路堤高度和不同渗透系数等影响因素下的浸水路堤内渗流特征以及路堤稳定性,并研究了不同水位变化下路堤侧向位移和最大位移的影响规律。为定量化评价各因素对路堤稳定性的影响,模拟实际填土材料对研究的不同填土材料的物理力学参数进行赋值,采用正交试验设计方法分析得到路堤高度、水位降幅、水位降速和渗透系数对路堤稳定性影响的贡献率,结果表明:在单侧水位变化下黏性土浸水路堤稳定性影响因素中,路堤高度变化对路堤稳定性的影响最大,贡献率为69.97%。渗透系数对路堤稳定性影响最小,贡献率仅为0.96%。影响路堤稳定性大小因素的重要程度由大到小排序依次为路堤高度>水位降幅>水位降速>渗透系数。Based on the immerseable embankment with water on both sides,using the calculation software Geo-studio,the seepage characteristics and the stability of immerseable embankment affected by filling material,unilateral and bilateral water level drops,water level reducing rate,embankment height and permeability coefficient respectively are analyzed. The rules of lateral displacement and the maximum displacement of embankment affected by water level drop are studied as well. For quantitative evaluation of the factors that affect the stability of embankment,the actual filling materials are simulated to assign the values to the physical and mechanical parameters of the studied different filling material. The contribution rates of influence of the 5 factors except filling material on the stability of immerseable embankment are analyzed by orthogonal experimental design method. The result shows that（ 1） among the factors which contain unilateral water level change that affect the stability of clayey immerseable embankment,the influence of embankment height is the biggest,whose contribution rate is 69. 97%;（ 2） the permeability coefficient has the smallest influence on the stability of embankment,whose contribution rate is only 0. 96%. The influence sequence of the factors from big to small are embankment height,water level drop,water level drop speed,permeability coefficient.

关 键 词：道路工程 浸水路堤 数值模拟 渗流特征 稳定性 正交试验 

分 类 号：TU443[建筑科学—岩土工程]