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本文应用波动方程计算程序,逐个改变输入参数,对单桩的承载力进行了大量的计算,分析了各个参数对桩承载力的影响。分析表明,所有输入参数可分为两大类:桩-土系统的固有参数和桩-锤系统的辅助参数。固有参数包括土的Q值、粘性阻尼系数J。和J,桩的弹模、截面积和桩长等等,它们的值决定桩的承载力;辅助参数包括锤重、落高、帽垫、桩垫和桩帽的弹簧常数、锤击效率等,它们的值的改变将表观上影响R-S曲线或R,-N曲线,但不改变桩的实际承载能力。分析还表明,除了桩本身所固有的参数外,土的Q值对桩的承载力影响最大。
In this paper, the wave equation calculation program is used to change the input parameters one by one, and the bearing capacity of a single pile is calculated in large numbers. The influence of various parameters on the bearing capacity of the pile is analyzed. The analysis shows that all input parameters can be divided into two categories: the inherent parameters of the pile-soil system and the auxiliary parameters of the pile-hammer system. The intrinsic parameters include the Q of the soil and the viscous damping coefficient J. And J, the pile’s elastic modulus, cross-sectional area and pile length, etc., their values determine the bearing capacity of the pile; auxiliary parameters include hammer weight, drop height, cap gasket, spring constant of pile and pile cap, hammering efficiency, etc. The change in their values will apparently affect the RS curve or the R, -N curve, but does not change the actual bearing capacity of the pile. The analysis also shows that, in addition to the inherent parameters of the pile itself, the Q value of the soil has the greatest influence on the bearing capacity of the pile.