SOME CONSIDERATIONS ON PREDICTION OF DETERIORATION PROCESS BASED ON INSPECTION RESULTS FROM COASTAL PROTECTION FACILITIES

Abstract

 In this paper, the deterioration process of coastal protection facilities was investigated using inspection data obtained according to "Manual on Maintenance of Coastal Protection Facility for Life Cycle Management". Utilizing the data, transition rates, which are considered as deterioration speed of facilities, were calcurated by Markovian chain model. As a result, it was found that the facilities which have a high transition rate exists in certain ratio regardless of type of facility or construction site. As future tasks, it is necessary to make a database of facilities regarding construction year, structural type and record of inspection or repair, and revise the manual from the viewpoints of inspection items, evaluation method, classification of degree of soundness, and deterioration prediction.