本文介绍了用测量大锤撞击作用下的力和加速度以确定桩的静态轴向承载力的凯司(CASE)法。介绍了推导计算桩贯入阻抗力的基本方程,并给出了现场测量的例子。要有效地使用这种方法,就要将其测得的承载力与静力法测得的桩承载力对比来确定“阻尼”常数,或通过改变锤重和落距使V_b。趋近零,获得桩的静承载力,并求得“阻尼”常数。 In this paper, the CASE method is introduced to determine the static axial bearing capacity of a pile by measuring the force and acceleration under the impact of a sledgehammer. The basic equations for deriving the penetration resistance of the calculated pile are introduced and examples of on-site measurements are given. To use this method effectively, it is necessary to determine the “damping” constant by comparing its measured bearing capacity with the static bearing force measured by the static method, or by changing the hammer weight and drop distance to make V_b. Approaching zero, the static bearing capacity of the pile is obtained, and the “damping” constant is obtained.