游艇码头定位桩桩长的确定方法

针对温州瓯江港区浮式游艇码头在接近35 m淤泥质土的地质条件下全直定位桩桩长确定和地基承载能力的问题,采用数值模拟方法,在波浪力和水流力作用下,对不同定位桩长的码头结构进行三维全尺度数值模拟分析和地基承载力校验,得到不同定位桩长的剪力和弯矩的内力分布特征、桩顶最大位移、桩身最大应力随不同桩长变化趋势。再根据定位桩自重和桩侧土极限侧摩阻力标准值确定桩底应力,与地基承载能力进行对比分析。研究表明,对于类似工程,可采用以地基承载力和桩顶位移为主、以桩身应力控制为辅助的控制方法来确定桩长。

Method of determining gauge pile length in yacht wharf

In view of the problem of the determination of the length of the full straight positioning pile and the bearing capacity of the foundation of the floating yacht wharf in Oujiang Port area,Wenzhou,under the geological condition of nearly 35 m muddy soil,the three-dimensional full-scale numerical simulation analysis and the verification of the bearing capacity of the foundation of the wharf structure with different positioning pile length are carried out by using the numerical simulation method under the action of wave force and flow force.The internal force distribution characteristics of shear force and moment,the maximum displacement of pile top and the maximum stress of pile body change with different pile length are obtained.The research shows that for similar projects,the control method based on bearing capacity of foundation and displacement of pile top as the main method,and pile shaft stress control as the auxiliary method can be used to determine piles length.