Fit-together type of precast concrete lining and bridging structural body
The present invention relates to a fit-together type of precast concrete lining and bridging structural body in which main girders are integrated with deck plates. Precast concrete deck members connected in longitudinal and transverse directions are pre-stressed by pre-stressed members, thereby making it possible to increase load carrying capacity or rigidity of a structure to stably use the structure for a long time. Further, it is possible to support the load applied from the top of a deck structure with a small thickness, and to make the deck structure light. Due to a knockdown type (fit-together type), installation and dismantlement are easy, and reuse is possible, and thus it is possible to provide convenient construction and low production costs.
1. 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.
2. The fit-together type of precast concrete lining and bridging structural body according to claim 1 , wherein each precast concrete deck member includes a plurality of through-holes formed in a body at predetermined intervals.
3. The fit-together type of precast concrete lining and bridging structural body according to claim 1 , wherein each precast concrete deck member includes a plurality of bolt insertion grooves formed in a lower surface thereof in a connecting direction at predetermined intervals, and wherein each precast concrete deck member further includes a movable anchor bracket at a lower portion of one end of the precast concrete deck member, wherein the movable anchor bracket includes installation holes into which installation bolts fastened to the bolt insertion grooves are fitted in an upper portion thereof, the movable anchor bracket being movable in the connecting direction of the precast concrete deck member at the lower portion of the end of the precast concrete deck member.
4. The fit-together type of precast concrete lining and bridging structural body according to claim 1 , wherein each precast concrete deck member includes a plurality of pin insertion grooves formed in a lower surface thereof in a connecting direction at predetermined intervals, and wherein each precast concrete deck member further includes a movable anchor bracket at a lower portion of one end of the precast concrete deck member, wherein the movable anchor bracket includes a plurality of pins which are inserted into the pin insertion grooves in an upper portion thereof, wherein the movable anchor bracket is movable in the connecting direction of the precast concrete deck member at the lower portion of the end of the precast concrete deck member.
5. The fit-together type of precast concrete lining and bridging structural body according to claim 1 , wherein the upper plate includes upper anchors at predetermined intervals to which one end of the post-tensioned members is fixed such that the post-tensioned members are equal in length.
6. The fit-together type of precast concrete lining and bridging structural body according to claim 1 , wherein a transverse fixture, to which one end of the post-tensioned members is fixed, is provided between the sidewalls of the precast concrete deck members.
7. The fit-together type of precast concrete lining and bridging structural body according to claim 1 , wherein each sidewall is fixed with tubular guide pipes into which the post-tensioned members are inserted, and wherein each post-tensioned member is fixed to opposite ends of each guide pipe.