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中文摘要：
软土具有压缩性大、渗透性低和固结变形时间长等特点,往往还有一定的超固结特性,这些特性给地基沉降的预估和计算增加了难度。统一硬化模型（UH模型）能够描述超固结土的硬化、软化、剪缩和剪胀等应力-应变特性以及应力路径对它的影响,其参数与剑桥模型相同。通过应用该模型,对三轴试验进行有限元分析,并对有限元分析结果与单元预测的结果进行对比。最后,结合某一工程实例对路堤变形进行三维有限元分析,分析和对比超静孔隙水压力、地表沉降和水平位移的变化规律。
英文摘要：
Besides large compressibility, low permeability, and long deformation time, soft soil sometimes has some overeonsolidation characteristics, which increases the difficulty to estimate and calculate the ground settlement. The unified hardening model （UH model ） can describe many characteristics of clays well, including stress-strain relationships, stress dilatancy, strain hardening and softening, and path dependency behavior. The parameters in the model are as the same as those in the Cam-clay model. By using the the UH model, numerical simulation of triaxial tests was performed, while the FEM results and unit predicted results using UH model were compared. Three- dimensional finite element analysis of deformation of an embankment on soft clay was carried out combining with an actual project. The changes in excess pore pressure, ground settlement and lateral displacement were analyzed and compared with the measured data.
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