The SS caisson (SPACE SYSTEM CAISSON) method fills the space (gap) between caisson circumference surface and country rock with the space gravel, and it is the open caisson method which gently installs the caisson only by the dead weight at the good accuracy by reducing skin friction resistance which depends on caisson circumference surface, while the stability of country rock is attempted. The following have been carried out : Until now field measurement and indoor model experiment of conventional normal caisson model and the SS caisson model without exhaust slot. As the result, it was proven that the skin friction decreased from open caisson very much This time, it experimented based on this result in order to consider the effect as in addition, there is an exhaust slot.textapplication/pdfdepartmental bulletin pape
