夯锤在水中运动特性的试验研究

Experimental study on motion characteristics of pounder in water

水下抛石基床在海岸工程中应用广泛,重锤夯实法为抛石基床的主要密实方法之一。针对水下强夯过程中,夯锤受到水阻力影响,无法准确测定夯击能的问题,进行圆台型夯锤在水中运动特性的试验研究,采用理论计算、模型试验及数值模拟相结合的方法,通过对比分析,得到确定夯锤水阻力系数的数值计算方法,为确定不同形状的夯锤有效夯击能提供依据。

Underwater rubble mound foundation is widely applied in coastal engineering, and heavy hammer tamping is one of the main method for the rubble mound foundation.This paper aimed at that the tamping energy can＇ t be determined due to the influence of the water resistance during the construction of the dynamic compaction in water. Experimental study on the motion characteristics of the cone-like pounder is made by the method combining the theoretical calculation, model test and numerical simulation.The numerical computation method to determine the drag force coefficients is obtained, which provides the basis for calculating the tamping energy of different shapes of pounder.