Fit-together type of precast concrete lining and bridging structural body

A fit-together type of precast concrete lining and bridging structural body which is assembled with a plurality of precast concrete deck members formed of a concrete material so as to be connectable in a longitudinal direction and a transverse direction, wherein each precast concrete deck member includes sidewalls protruding downwardly from an outer circumference of an upper plate, and wherein a space is defined by the upper plate and the sidewalls, wherein opposite ends of post-tensioned members generating post-tension in the longitudinal direction over a length of at least one of the precast concrete deck members are fixed to the precast concrete deck members interconnected in the longitudinal direction, wherein the sidewalls include one pair of transverse junction sidewalls facing each other in the longitudinal direction and one pair of longitudinal junction sidewalls facing each other in the transverse direction, wherein shear keys protrude from one of the longitudinal junction sidewalls and one of the transverse junction sidewalls, and key insertion grooves into which the shear keys are insertable are formed in another of the longitudinal junction sidewalls and another of the transverse junction sidewalls, and wherein the upper plate includes a plurality of upper anchors at predetermined intervals to which one end of the post-tensioned members is fixed.