软土地基上高填路堤沉降变形与稳定性模拟试验研究  

Research on soft land base high filling and deformation and stability simulation test research

作　　者：张小荣 Zhang Xiaorong(Qinghai Transportation Planning and Design Institute Co.,Ltd.,Xining 810000,China)

机构地区：[1]青海省交通规划设计研究院有限公司,西宁810000

出　　处：《青海交通科技》2024年第3期84-90,共7页Qinghai Transportation Science and Technology

摘　　要：为研究软土地基高填路堤沉降变形与稳定性,采用Optum G2软件模拟了软土地基高填路堤动态填筑过程,得出短期与长期工况下高填路堤的沉降变形特征,并用强度折减法计算出短期与长期工况下高填路堤的安全系数。研究表明:软土地基高填路堤沉降值与填筑高度呈正相关,且短期与长期工况的沉降变形呈现“U”字形状;随着填筑高度的增加,长期工况的高填路堤安全系数将降低,但对于短期工况的高填路堤,其安全系数将增大;随着填筑高度的增加,铺设土工格栅后,短期与长期的高填路堤安全系数均增加。以上研究成果对软土地基高填路堤工程的设计、施工和维护均具有重要的借鉴意义。In order to study the settlement deformation and stability of soft ground high fill embankment,Optum G2 software was used to simulate the dynamic filling process of soft ground high fill embankment,to obtain the settlement and deformation characteristics of high fill embankment under the short-term and long-term conditions,and to calculate the coefficients of safety of the high fill embankment under the short-term and long-term conditions by the strength reduction method.The study shows that:the settlement value of high fill embankment with soft ground is positively correlated with the filling height,and the settlement deformation of short-term and long-term working conditions shows a"U"shape;with the increase of filling height,the safety coefficient of high fill embankment with long-term working conditions will be reduced,but for high fill embankment with short-term working conditions,its safety coefficient will be increased;with the increase of filling height,the safety coefficient of high fill embankment with short-term working conditions will be reduced,and with the increase of filling height,the safety coefficient of high fill embankment with long term working conditions will be reduced.With the increase of filling height,the safety coefficient of high-fill embankment for short-term and long-term conditions will increase after laying geogrids.The above research results can be of great significance for the design,construction and maintenance of high-fill embankment projects with soft ground.

关 键 词：软土地基 高填路堤 沉降变形 安全系数 数值模拟 

分 类 号：U416.12[交通运输工程—道路与铁道工程]