钢板桩动力拔桩过程中桩侧摩阻力分析及设备选型

Side friction analysis during pulling of steel sheet pile and equipment selection

钢板桩在沉贯到设计深度的过程中由于遇到障碍或沉桩困难等原因,经常出现桩身偏斜或偏位过大等情况,此时需要将桩拔出进行重新沉桩。因此在选择振动锤型时,需考虑桩锤是否满足拔桩力的要求。在深入探讨振动拔桩过程中桩土相互作用的基础上,结合八所港老港区1#~4#泊位改造工程,提出拔桩设备的选型,进而研究了拔桩力与地基土质情况与拔桩长度的关系。

Pile deflection and great inclination often occur due to obstruction or hard pile sinking during pile penetration into the design depth.In such situation,the pile should be pulled out and then driving again.Therefore,whether the hammer meets the need of pile extracting should be taken into account during hammer selection.Based on the analysis of the interaction between pile and soil during pile pulling,and combining the renovation engineering of berths No.1 to No.4 of the old port area of Basuo port,we select pile pulling equipments,and further analyze the relationships among the pile pulling,soil property and pile length.