Marc有限元软件在黄土路堤工后沉降预测中的应用

摘要

On an experimental site in wet-collapse loess area, a loess subgrade was compacted. Deformation data of gradual loading and instantaneous loading were measured respectively. It has been concluded that the deformations of gradual loading were larger than those of instantaneous loading and the difference between two values reduced to a fixed number with the increase of vibrating compactions. MSC. Marc is an international advanced nonlinear finite element analysis program based on displacement method. Observation data of settlements after construction was simulated and analysed by the software. The deformations at subgrade center reduced toward two sides and a pot-shaped settlement regulation was observed.%在湿陷性黄土地区某实验场地对黄土路堤进行振动碾压处理,并对黄土路堤逐级加载和一次性加载的沉降变形进行数据检测,得出逐级加载要比一次性加载沉降变形量大,且两者的差值随着振碾遍数的增加而减小并趋于一个稳定值的结论.MSC.Marc是目前国际上先进的基于位移法的通用非线性有限元分析程序,采用MSC.Marc有限元软件模拟分析工后沉降实测数据,得出路基中心的变形沉降量从中心向两侧呈递减趋势且呈盆形沉降规律.