碎石桩处理软土路基变形影响因素分析

Study on Influencing Factors of Deformation of Soft Soil Roadbed Treated with Crushed Stone Pile

采用有限元软件建立碎石桩处理软土路基计算模型,深入研究不同碎石桩埋深、碎石桩间距、地基弹性模量及路堤填方高度对路堤变形的影响,并针对路堤位移和应力变化规律进行探讨,分析结果表明:适宜的增大碎石桩埋深可以有效减小路堤变形;增大碎石桩间距会导致路堤较大的应力和位移变形;增大地基弹性模量可以有效降低路堤最大竖直位移,但路堤水平位移和应力会有所增大;增大路提填方高度会导致路堤发生较大的位移变形和应力变形;研究结果可为碎石桩处理软基工程提供理论参考。

In this paper,the calculation model of soft soil subgrade treated by gravel pile is established by using finite element software,and the influence of different gravel pile burying depth,gravel pile spacing,elastic modulus of foundation and embankment height on embankment deformation is deeply studied.The variation of displacement and stress of embankment is discussed.The results show that the deformation of embankment can be effectively reduced by increasing the buried depth of gravel pile.Increasing the distance between gravel piles will lead to large displacement and certain stress deformation of embankment,increasing the elastic modulus of foundation can effectively reduce the maximum vertical displacement of embankment,but the horizontal displacement and stress of embankment will increase.Increasing the height of road-lift fill will lead to the occurrence of embankment Large displacement deformation and stress deformation,the research results can provide reference for related projects.