桩承式加筋路堤格栅分析

将单桩等效处理范围简化为圆柱体,假定桩间土上部的格栅受上覆土压力作用后变形为二次抛物面,考虑路堤中的土拱效应,得到了格栅受力分析的解析方法。当路堤中的土拱处于弹性状态时,格栅对提高桩体荷载分担比的作用不大;当路堤中的土拱处于塑性状态时,格栅对提高桩体荷载分担比有明显的作用;当格栅与地基的相对刚度较小时,格栅对减小桩间土沉降的作用很小。最后对一个模型试验结果和一个工程实例进行了分析。

Behavior of Geosynthetics in Pile-supported and Geosynthetic-reinforced Embankments

The subsoil and the embankment treated by a single pile are simplified as a circular column.Considering the soil arching effect,an analytical study is conducted to investigate pile-soil-geosynthetics interactions.Theoretical solution suggests that the inclusion of geosynthetics in the fill enhances the pile efficacy and reduces the differential settlement when the soil arch is in plastic state;when the soil arch is in elastic state,there is no much difference between the cases with or without the geosynthetics.When the ratio of the geosynthetics stiffness to the soft ground stiffness is small,the geosynthetics has little effect in reducing the maximum settlement midway between the pile caps.Finally,these formulas are employed to analyze a set of full-scale model tests and a practical case.