Abstract: Through the analysis of the 4th power law and the present axleload conversion law popular in our country, this paper indicates their unsuitability for overload axles. By using equivalent theoretical and actual deflection restrains, a conversion method of computing axleload equivalent factors is derived, and its applicability is analysed. This method can be tentatively used for overload equivalent conversion.

Key words: overload vehicles, deflection equivalent, equivalent factors, theoretical deflection, actual deflection

摘要： 通过对四次方公式及我国现有轴载换算公式的分析, 说明它们对超载轴轴载换算的不适用性,从而利用理论弯沉等效和实际弯沉等效双重约束条件推导了计算轴载等效换算系数的公式, 分析了它的适用性, 可初步用于超载轴的等效换算.

关键词: 超载车辆, 弯沉等效, 等效系数, 理论弯沉, 实际弯沉