Due to the non-uniformity and long-term settlement of soft foundation sections, the pavement maintenance planning in coastal areas had particularity. Taking the road maintenance planning in coastal areas as the starting point, the paper selected a expressway in ningbo, zhejiang province as the supporting project. Based on the maintenance history of road condition in recent years, the probability distribution of road condition index data over the years was analyzed, taking into account the annual cumulative equivalent axle load growth and the decline of road condition index, the paper carried out pavement damage maintenance planning and covering engineering planning respectively. The results showed that soft foundation sections with different settlement levels should be divided into different types and stages according to the history of soft foundation treatment over the years, and the performance attenuation of roadbed condition should be considered; When the road condition target was limited, it had better pertinence and applicability to strengthen the influence of pavement maintenance and maintenance history; the influence of traffic volume attenuation and road condition improvement after maintenance on the prediction of future maintenance area in the planning period were proposed by using comprehensive attenuation coefficient to quantify the quantity of damage maintenance; The integrated treatment, classification and subsection planning of soft foundation section and main road section pavement were carried out comprehensively, and the influence of maintenance historical traffic volume existing road condition and soft foundation settlement level were considered comprehensively, so that the pavement maintenance planning scheme had better extendability in coastal areas.

CICTP