To provide a manufacturing method for a prestressed concrete slab which can be used as a base course of a runway and that of a wharf, the weight of which is light, which can bear a load greater than a conventional product, and which can be inexpensively manufactured.
A diagonal-direction high-rigidity part 3, the rigidity of which is maximized in the central part of a diagonal line and made gradually lower toward both ends, is continuously arranged between both the opposite angles of a square precast concrete slab body A, and PC tendons 6a and 6b are inserted into the high-rigidity part 3, so that prestress can be imparted in both the diagonal directions. A high-rigidity-part component member B, which constitutes the diagonal-direction high-rigidity part, is preformed; prestress is imparted to the member B; and after that, concrete for the rest of a main body part is placed and molded.
KAWAMURA NAOHIKO
NAKAMURA OSAMU
