UNDER WATER FORM CONSTRUCTION METHOD

PROBLEM TO BE SOLVED: To reduce an amount of concrete and volume of reinforcing bars and reduce the work of a diver by driving a chemical anchor on a revetment which is already constructed in advance, installing a PC plate in the sea to connect its upper and lower parts tightly by a separator and assemble gable end form, and then placing water concrete. SOLUTION: A chemical anchor 11 is placed and fixed on a concrete face of a caisson 3 which is already installed. Next, a lower part fixing device 5 is installed based on the measurement of quaywall normal line. Then, the erection of conducting material timbering support waling is preceded from a caisson in which the installation of the device 5 is completed, and a conducting material timbering and a conducting material 8 are sequeutially installed in this order. The ground assembly and erection of an upper part fixing device 6 are succeedinglydone. Then, a PC plate 1 is put on a pedestal of the lower part fixing device 5 and is fixed. The PC plate 1 and the conducting material 8 of the upper part fixing device 6 are fixed. After that, a separator 4 is fixed at predetermined length, and gable end form is installed in the direction of construction work cross section. Consequently, it is possible to reduce a driver's work, reduce cost, and shorten construction term markedly.