桩承式加筋路堤时效性数值模拟研究

利用有限元数值模拟方法研究了桩承式加筋路堤的时效性变化规律。通过无桩无筋、无桩加筋、竖向桩体及水平加筋联合使用3种情况对比研究，分析了路堤填土荷载作用下软土地基中超静孔隙水压力随时间的变化规律，探讨了路堤水平位移、沉降和工后沉降、筋材最大拉力及桩体荷载分担比随固结时间的变化规律。研究结论可为软土地基上路堤的设计和施工提供重要的参考。

Numerical Simulation on Time-dependent Behavior of Geo-synthetics Pile-supported Reinforced Embankment

Finite element numerical simulation was conducted to investigate the time-dependent behavior of geo-synthetics pile-supported reinforced embankments. Based on comparative study on 3 different eases ： （ 1 ） un-reinforced embankment; （2） reinforced with geo-synthetics ; （3） reinforced with both geo-synthetics and pile walls, analysis was made on the variations of excess pore water pressure induced by the embankment load in soft ground and discussion was carried on the variation of the lateral displacement of embankment, construction settle- ment and settlement after construction, the maximum tension in geo-synthetlcs and the load sharing ratio of pile walls. The research conclusion can be the valuable reference for the design or construction of embankments in soft ground.