摘要
为了解决软土地基变形导致路面不均匀沉降问题,并使泡沫轻质土更广泛地应用于路堤填筑,利用ANSYS有限元软件,对泡沫轻质土填筑不同高度、密度和弹性模量的路堤进行了理论分析。研究结果表明,软土层弹性模量对路基沉降影响最大,而其粘聚力的变化对路基沉降几乎无影响;与普通路基相比,泡沫轻质土路基能够很大程度上降低路基沉降;泡沫轻质土路堤高度的增大、弹性模量的减小和密度的增大均会使路基沉降增大。同时,发现泡沫轻质土密度大于11kg/m3、路堤高度大于或等于12m时,路基易发生失稳。
In order to solve the problem of uneven settlement of the soft soil foundation, and to make the foam lightweight soil more widely used in embankment filling, the model in ANSYS finite element software is established, which can help the theoretical analysis of the embankment with different heights, density and elastic modulus of foamed light soil . Results show that the elastic modulus of soft soil layer have the most effect on the settlement of subgrade, and the change of cohesion has little influence on the settlement of subgrade. Compared with the common subgrade, the foam lightweight soil roadbed can largely reduce the subgrade settlement. The increase settlement of the embankment influence by the increase of the height of the embankment, the decrease of the elastic modulus and the increase of the density. Meanwhile, it is found that the roadbed is prone to be unstable when the density of the foamed light soil is over 11 kg/m3 , and the height of the embankment is over or equal to 12 m.
出处
《长沙理工大学学报（自然科学版）》
CAS
2017年第2期7-13,74,共8页
Journal of Changsha University of Science and Technology:Natural Science
基金
湖南省自然科学基金资助项目(13JJ3070)
内蒙古自治区交通运输厅建设科技项目(NJ-2015-35)
关键词
泡沫轻质土路堤
路堤填筑
路基沉降
路堤高度
密度
弹性模量
foamed light soil embankment
embankment filling
subgrade settlement
embankment height
density
elastic modulus
