Abstract
Tokyo Port Bridge in Metolopolitan Expressway Route No. 12 is being constructed to cross the Port of Tokyo from Shibaura area to Daiba area. The type of this bridge is the suspension bridge, the length is 918 meter and the length of center span is 570 meter. The anchorage of this bridge is constructed on caissons (70 meter x 45 meter). The upper slab of caissons is placed 5.5 meter to 6.0 meter in thickness, the volume of anchorage is 60 000 cubic meter, and then the upper slab of caissons and the anchorage are the mass volume concrete structures. This report presents the method of controlling thermal cracks, such as the super low-heat type cement, pipe cooling method, precooling method using liquid nitrogen, in massive concrete structures.
