COFFER DAM AND IT'S METHOD OF CONSTRUCTION WAS USED PIPE AND TEMPORARY GATE

摘要

A cofferdam using a pipe and a temporary water gate and a constructing method thereof are provided to desalt the water in the cofferdam and to preclude the cofferdam from being damaged by forming a temporary Watergate structure and a pipe connected with the temporary watergate. A cofferdam(10) is formed by stacking soil. A box type concrete structure has a temporary water gate(21). The temporary water gate is lifted up and down at the center of the front surface of the structure. A temporary Watergate structure(20) is formed to the structure to fix an angle through the medium of a rivet. Belt conveyors are longitudinally installed at four sides of the cofferdam. An impurity removal device is installed by fixing the lifts to be lifted up and down along the belt conveyers. A pipe(40) is connected with the temporary water gate. Excavation holes are formed by forming holes in the four surfaces of the cofferdam. A screen filter layer or a pebble layer, and a foundation concrete layer are formed in the excavation holes.