【摘要】 基于Biot固结理论和Neumann随机有限元理论,提出了沉降固结理论的Neumann随机有限元分析方法,并开发了相应的有限元计算程序.以某工程为例,对软土地基固结沉降进行随机有限元分析,探讨了地基沉降与超静孔压随机性状随时间的变化规律以及在空间上的分布特征.计算结果表明:不同随机有限元法沉降标准差的空间分布形式都比较类似,沉降标准差随着深度的增加而减小,并在坡脚附近出现局部减小现象;相同深度时,加固区的沉降标准差要大于非加固区.更多还原

【Abstract】 The Neumann stochastic finite element method for predicting the consolidation settlement of a foundation was developed based on the Biot’s consolidation theory,and a finite element program was designed to analyze the road embankment.Through an example of the practical project,the consolidation settlement of a soft soil foundation was analyzed using the Neumann stochastic finite element method,and the change over time and spatial distribution of the foundation settlement and excess pore water pressure were discussed.The calculated results show that the spatial distribution of the standard deviation of settlement obtained by different stochastic finite element methods is similar.The standard deviation of settlement decreases with the increase of depth,and has a local minimum near the slope foot.The standard deviation of settlement in the reinforced area is larger than that in the unreinforced area under the same depth.更多还原