短语词组短语pile shaft floating up 桩身上浮pile shaft skin 桩侧stress of pile shaft 桩身应力pile shaft concrete 桩身混凝土pile shaft grouting 桩侧压浆技术pile shaft skin friction 桩侧摩阻力pile shaft integrity coefficient 桩身完整系数pile shaft joint 桩身接缝 返回 pile shaft