PURPOSE: To enable the joint work of a caisson set on the sea bottom of deep water to be executed, by arranging two projections inside a hollow long cylindrical joint material and by injecting the filler of sand or the like in a section between the projections.
CONSTITUTION: Inside a longish hollow cylinder 2, longish filler-injecting space retaining materials 3 are arranged in parallel with each other to form joint material 1. The joint material 1 is firmly fitted on a fitting plate 4 made of rubber, and is set on one surface of a caisson 5 with tacks 6, and a filler injecting space 3b is filled up with the filler of asphalt, mortar, sand, or the like for injection. As a result, even when the caisson is settling-set on the sea bottom of deep water, then the filler inflow space retaining materials 3 are not crushed by water pressure, and the injected filler comes to the bottom of the filler injecting space, and the hollow long cylinder can be filled with the filler to expand from the lower end section.
RIYUUDOU SATOSHI
SHIZU KAZUMI
