Abstract
Two aspects were included in this paper:(1) evaluating the seriousness of earthquake induced cracks;(2) identifying the effectiveness of maintenance and rehabilitation (M&R). Firstly, through a theoretical analysis of elastic three-layer pavement model, pavement deflections D45 as well as D250 under FWD loading conditions at cracked and uncracked sections were recommended as indices to evaluate the seriousness of cracks. By means of statistical test, the structural evaluation procedure was proposed. Its validity was verified by coring tests. Then, by comparing the FWD deflections before and after M&R, the effectiveness of sealing, patching and overlay was identified.
