介绍了实验装置与测压系统，实测了饱和砂柱自由落体撞击地面后前期快过程和后期慢过程的孔隙水压力的变化。在此基础上，给出了前期快过程中冲击压力波形的传播及其与落高、测点位置等的关系，并探讨了后期超孔隙水压力与落高、砂样、测点位置以及饱和砂土的液化、密实之间的关系。 The experimental device and pressure measurement system are introduced. The changes of pore water pressure during the early and late stages after the free-fall of saturated sand column hit the ground were measured. Based on this, the relationship between the pressure wave propagation and the falling height and the location of the measuring point during the early period is given. The relationship between the excess pore water pressure and falling height, sand sample, measuring point and saturation Sand liquefaction, the relationship between the dense.