【摘要】 结合实际工程情况,针对吹填细砂及下卧软黏土地基的工程性质,对强夯-降水联合法和无填料振冲法结合整体塑料排水板加固此类地基的适用性进行了试验研究。在试验的基础上,确定了振冲施工工艺的振冲间距、上拔间距等振冲大面积施工参数,同时分析了强夯过程中下卧黏性土中孔隙水压力的增长消散过程及影响因素,得到了一些有益的结论,对类似工程有一定的借鉴意义。更多还原

【Abstract】 According to Shanghai harbor ground treatment project,considering the engineering properties of fine sands and disturbed soft soils underlying it,method of PVD-improved subsoil with two technologies of vibroflotation compaction without additional stone aggregates for improving fine sands as well as well dewatering combining with dynamic consolidation for strengthening the disturbed soft soils underlying the hydraulic fine sands is introduced.Based on results of field tests,large-area vibroflotation compaction construction parameters are determined;and the increasing and dissipation regularity of excess pore water pressure in different soil layers and its influencing factors are analysed.Finally,some useful conclusions are drawn.更多还原