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F2 桩的轴向阻力的分析F2.1 总则 F2.1.1 桩的轴回阻力由两部分组成,一部份为表面累计摩阻力,另一部份为端阻力。 F2.1.2 主要通过端部阻力承受荷载的桩称作端部承载桩,而摩擦桩一词用于主要是通过轴向摩擦力承载的桩。 F2.1.3 桩的结构性能在很大程度上受打桩方法的影响,见10.4(R)。桩的不同施工方法如扩孔桩、水冲桩等将趋向于减小轴向摩擦力,而强行打入的桩则可能在土壤和桩中都留下很大的残留应力。 F2.1.4 开口钢质圆柱(管)桩是最常用的支承海上结构的桩。
Analysis of the axial resistance of F2 piles F2.1 General F2.1.1 The axial return resistance of piles consists of two parts, one is the cumulative friction on the surface and the other is the end resistance. F2.1.2 Piles that mainly bear load through end-resistance are called end bearing piles, and the term friction pile is used for piles that are mainly carried by axial friction. The structural performance of piles in F2.1.3 is largely influenced by the piling method, see 10.4(R). Different construction methods of the pile, such as bored piles, water piles, etc. will tend to reduce the axial friction force, and forcibly driven piles may leave a large residual stress in the soil and piles. F2.1.4 Open steel cylinder (pipe) piles are the most commonly used piles for supporting offshore structures.