软土地基中预制桩施工往往会产生较大的孔隙水压力。分析了海相软土中预应力薄壁管桩采用锤击沉入法施工产生超孔隙水压力的变化规律。通过对单桩沉桩过程中孔隙水压力的观测,得出以下结论:单桩施工引起的孔压在初期消散较快,其后逐渐缓慢;引起的最大孔压接近于上覆有效土压力的1.5倍。最后提出了控制和减小孔隙水压力的施工措施。 Precast piles in soft ground tend to produce larger pore water pressure. The variation regularity of excess pore water pressure produced by hammering sinking method in prestressed thin-wall pipe pile in marine soft soil was analyzed. Through the observation of the pore water pressure in the pile sinking process, the following conclusions are drawn: The pore pressure caused by the single pile construction dissipates rapidly in the initial stage and then gradually slows down; the maximum pore pressure caused is close to the effective earth pressure 1.5 times. Finally, the construction measures to control and reduce the pore water pressure are put forward.