FIELD MEASUREMENT OF TENSION OF MOORING CABLES DURING INSTALLATION OF BREAKWATER CAISSON

Abstract

 Lack of technical experts and inheritance of skills to the next generation has been serious problems in construction sites. In this study, the authors try to quantify experiences and skills of technical experts on how to handle a mooring cable and how to operate a winch. In the trial, the tension in the mooring cable and the oscillation of the caisson were measured in installing caissons. The authors show that the cable with larger tension at the time when a caisson is drawn is different from that at the time at the time when a caisson is placed on a rubble mound under the conditions targeted in this study. They also show that the tension of each cable is the largest when a caisson is drawn.