大面积静压群桩挤土效应施工控制措施研究

Study on Construction Control Measures of Soil Squeezing Effect of Large Area Static Pressure Pile Group

预制管桩在施工过程中,极易引发挤土效应,大面积静压群桩尤为明显。论文依托昆明市某项目大面积群桩施工,通过设置AB两组条件一致试验区,探索更适用于大面积群桩施工过程中挤土效应控制措施。通过对A组试验数据进行分析,改进B组施工控制措施,发现针对大面积静压群桩,适当加大引孔深度、设置深层泄水井对于挤土效应控制更为有效。

In the construction process of precast pipe pile,it is very easy to cause soil squeezing effect,especially large-area static pressure pile group.Relying on the large-area pile group construction of a project in Kunming,the control measures of soil squeezing effect in the process of large-area pile group construction are explored by setting up two groups of A and B test areas with consistent conditions.Through the analysis of group,a test data and the improvement of group B construction control measures,it is found that for large-area static pressure pile groups,appropriately increasing the depth of pilot holes and setting deep drainage wells are more effective for the control of soil compaction effect.