软土地区路堤荷载作用下砂井(墙)地基固结沉降特性分析研究

从广泛使用的elogP曲线出发 ,按照小变形假设及应力水平和应力路径的研究方法 ,建立可综合考虑土体结构性、非线性、应力历史的增量型本构关系 ;在此基础上建立砂井、砂墙地基在总应力变化非线性变形情况下的固结方程 ,通过按初始条件移动法对其求解 ,建立基于同一深度处平均超孔压相等原则的轴对称砂井地基与平面应变砂墙地基的等效转化公式 ;最后结合一实际工程进行计算分析

An Analytical Study on Consolidation Settlement Characteristics of the Sand Drain (Wall) Subgrade under Embankment Load at Soft Soil Area

Based on the Extensively|used e|logP Curve, and on small deformation assumption, and the research method for stress level and stress path, an incremental constitutive relation was established. On the basis of this relation, the consolidation equation of the sand drain (wall) Subgrade was established under varied total stress and non|lineal deformation. The equation was solved through initial condition movement method, and the equivalent conversion equation was established between axial symmetrical sand drain Subgrade and plane strained sand wall Subgrade based on same depth and same excessive pore pressure.