MANUFACTURE OF CAISSON BOTTOM SLAB SECTION AND BOTTOM SLAB SECTION STRUCTURE OF CAISSON

摘要

PURPOSE: To enable the placing execution of concrete on the base of a caisson bottom slab section without inverting a large-sized bottom slab section in the manufacture of the caisson bottom slab section. ;CONSTITUTION: A plurality of mortar spacers 9 with a height of 50-250mm are installed on a floor face 3, and a plurality of small-sized panel-shaped steel plates, in which reinforcing materials such as studs are welded previously on bases, are welded and constructed on these spacers 9 while a bottom-slab section steel platy 5, in which sidewall steel plates 7 are welded on a top face, is placed. Forms 4 are mounted on a periphery, high flow concrete 8 is injected into a space 2 formed between the steel plate 5 and the floor face 3, and concrete is placed on the base of the bottom-slab section steel plate 5. Accordingly, the bottom-slab section steel plate 5 may not be inverted unlike a conventional method of construction, thus improving workability and safety. Concrete is placed for the sliding prevention of a caisson and the corrosion prevention of the steel plates.;COPYRIGHT: (C)1996,JPO