短语词组短語pile shaft floating up 樁身上浮pile shaft skin 樁側stress of pile shaft 樁身應力pile shaft concrete 樁身混凝土pile shaft grouting 樁側壓漿技術pile shaft skin friction 樁側摩阻力pile shaft integrity coefficient 樁身完整系數pile shaft joint 樁身接縫 返回 pile shaft