采用高应变动测法分析CFG桩承载力的试验研究

Load transfer mechanism of cement-flyash-gravel pile in soft clay by high strain testing

在高速公路海相超软土地基处理中CFG桩(水泥-粉煤灰-碎石桩)的应用已越来越广泛[1～4]。目前由于CFG桩荷载传递的规律及设计计算还局限于经验判断而造成浪费。这里将重点研究动力载荷测试确定单桩承载力和桩侧阻力。试验选在连云港海相软土地区,试验结果将对CFG桩设计参数进行修正。

Cement-flyash-gravel CFG, piles are found more and more application to soft clay ground improvement in expressway engineering in China. The load transfer mechanism and design calculation theory are conducted empirically in most cases, this resulting in the higher cost compared with other columns. This study focuses on the dynamic method in determining bearing capacity and shaft resistance. The testing site is typically selected in Lianyungang, where the soft marine clay is well known. Finally, the CFG pile ...