케이슨 底面의 滑動抵抗力 向上에 관한 硏究

Abstract

The purpose of this study is to investigate and analyze the cause if the damage of the old type breakwater. Most of the damage of the breakwater are caused by misfitting. So shear keys are installed at the caisson bottom in order to increase a resisting force against sliding at the caisson bottom. Horizontal movement can be calculated from a strain analysis by a finite element method when the position of shear keys are changed. The results of this study are as follows: When the shear keys are installed at the caisson bottom, the resisting force against sliding increases greatly and consequently the misfitting of the caisson can be prevented considerably. It is most increase a resisting force for sliding when the shear key is installed on each of the wall of the caisson bottom. When three shear keys are installed, horizontal resisting force rises up to about 26%. Considering the construction of the caisson, it is effective to install shear keys on the side upon which wave pressure acts.