Investigation and Preventive Repair Strategy for North Breakwater Dome at Wakkanai Port
By H. Yokota, Y. Sato and K. Yoshida
Concrete Journal, Vol.55, No.4, Apr. 2017
- Synopsis
- The reinforced concrete north breakwater dome (427.6 m long) built at the Port of Wakkanai, Hokkaido was built in 1936. It works as a protective facility not only for the port but also for a pedestrian passageway. Renovation was carried out from 1978-1981 because of aging problems, and seismic retrofitting was followed from 1999-2002. However, over more than 30 years after the renovation, further deterioration has progressed including cracks, delamination, spalling of cover concrete and corrosion of steel reinforcement. Since the dome has been registered in the civil engineering heritage list and played a landmark of sightseeing spots, strategic repair is required to setup taken into account structural performance recovery and aesthetic preservation. This technical report presents the results of structural assessment and consideration of the repair strategy based on the preventive maintenance scheme.
- Keywords:
- port and harbor structure, assessment, preventive measure, repair strategy, aesthetic, structural performance
