黄河中下游冲积平原深长桩桩侧极限摩阻力研究

对于黄河中下游冲积平原砂性土层深长桩桩侧极限摩阻力问题,根据该地区的地质特性、采用有限元软件ABAQUS对大量不同参数的深长桩进行了建模分析,结果表明:桩顶荷载与桩侧摩阻力近似呈线性关系,桩长、桩径、桩-土界面条件、桩周土的力学性质等对桩侧摩阻力影响程度不同.根据有限元计算结果推导出了砂性土层深长桩桩侧极限摩阻力的计算公式,用其对工程实例进行验算,并将计算结果与静载试验实测结果进行了对比,二者吻合较好,说明有限元建模方法、参数设置及结论可靠,计算公式较准确.该研究可为该地区深长桩的优化设计提供参考.

Study on the limit shaft friction resistance of long piles in the middle and lower reaches of the Huanghe River alluvial plain

In order to investigate the limit shaft friction resistance of long piles in the middle and lower reaches of the Huanghe River alluvial plain of sandy soil,finite element software ABAQUS was adopted to simulate long piles with different parameters according to the geological characteristics in the region.The simulated results indicate that the load at the top of a pile is approximately in direct proportion to the shaft friction resistance of the pile;the length and diameter of the pile,the interface conditi...