EXECUTION METHOD OF CAST-IN-PLACE PRESTRESSED CONCRETE FLOOR SLAB OF BOX GIRDER OF CLOSED SECTION

摘要

PROBLEM TO BE SOLVED: To provide an execution method of a cast-in-place prestressed concrete floor slab of a box girder of closed section having small mutual restriction between the floor slab and the box girder. ;SOLUTION: A stud part 14 is of blockout structure, a sliding member 15 is installed on other parts than the stud part 14, a form 17 of the conventional structure is installed, a concrete 18 is placed, the form of the conventional structure is removed after the concrete is cured, a prestressing steel wire 13 is tightened, and a blockout part 19 is filled with a mortar. A steel plate 20 having studs is temporarily tightened by high-strength bolts 22 using an expansion holes 21, the form 17 of the conventional structure is installed, the concrete 18 is placed, the form 17 of the conventional structure is removed after the concrete is cured, the restressing steel wire 13 is tightened, and the high-strength bolts 22 are permanently tightened.;COPYRIGHT: (C)2001,JPO