With the amendment of Port and Harbor Act, the necessity of reinforcement work for piers possessed by private business operators is increasing. At the same time, construction method which can be easily applied is desiring for the demand of laborsaving in construction field these years. Based on these, authors proposed reinforcement methods focusing on pile head of piers. In this paper, cyclic loading tests towards on piers applied by these reinforcement methods are carried out to confirm the strengthening effect and validity in reinforcement design. As a result, strengthening effect and validity in design of proposed methods are verified.
