螺旋钢桩设计参数对抗压承载性能的影响研究

为研究不同的设计参数（钢盘间距、桩长、钢盘埋深、钢盘个数）对多钢盘螺旋钢桩抗压性能的影响，首先通过螺旋钢桩现场静载试验结果与有限元软件数值计算对比分析，验证其数值计算的可靠性，然后建立17组不同参数的螺旋钢桩-土数值模型。计算分析发现:螺旋钢桩极限抗压承载力随钢盘间距的增大基本呈现先线性增大后不变趋势，随着桩长和钢盘埋深以及钢盘个数的增加呈近似线性增长。

Study on Influence of Design Parameters of Steel Spiral Pile on Compressive Bearing Capacity

In order to study how the design parameters(blade spacing, pile length, buried depth of blade, number of blade)affect the compressive performance of multi-blade steel spiral pile, differently, the result of on-site static load test on steel spiral pile and that of numerical calculation with finite element software were compared and analyzed to verify the reliability of the calculation; and then the pile-soil numerical model with 17 sets of parameters was established. It was found out by the calculation that the ultimate compressive bearing capacity of steel spiral pile presents linear increase first and then stable state substantially with the increase of blade spacing, or presents approximate linear increase with the increase of pile length, buried depth and number of blade.