Space distribution features of permanent deformation of sub-grad under repeated load is the basis for analyzing how the permanent deformation affect the rigid pavement structure. Based on Mechanics-empirical method, layer-wise summation method with consideration of load transverse distribution frequency was proposed, the calculation procedure was introduced as well. Then, a typical clay sub-grade ' s permanent deformation of rigid pavement is predicted with the layer-wise summation method, what' s more, the result was analyzed with mathematical statistics, finally the space distribution features of permanent deformation of sub-grad under repeated load was put out.%掌握重复荷载作用下刚性路面路基永久变形的空间分布特征是分析路基永久变形对刚性路面结构影响程度的基础.以力学-经验法的路基永久变形计算方法为基础,提出了考虑轮载横向分布频率的分条分层总和法,并简述其分析流程及步骤.以黏土路基为例,采用分条分层总和法对典型刚性路面路基永久变形进行预估,并结合数理统计等方法对计算结果进行分析.通过对计算结果的分析整理,得到了重复荷载作用下刚性路面路基永久变形的空间分布特征.
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