BRIDGE SLAB STRUCTURE WITH A FALLING BRIDGE PREVENTION DEVICE AND A CHEST WALL BY EXTENDING A SLAB VERTICALLY, AND WITHOUT AN EXPANSION JOINT DEVICE

摘要

PURPOSE: A bridge slab structure with a falling bridge prevention device and without an expansion joint device is provided to prevent the separation of a bridge by horizontal load, to improve the trafficability of vehicles, to prevent the deterioration of a concrete structure caused by a water leakage and to simplify a maintenance work for a bridge. CONSTITUTION: The bridge slab structure with a falling bridge prevention device and without an expansion joint device comprises: a chest wall(2) formed to be projected downward from the lower side of a slab(1) and provided with a wing wall(7), wherein a main reinforcing bar of the wing wall(7) is located on the backside of the wing wall(7) to be anchored on the chest wall(2) and extended to a falling bridge prevention device(6) to secure the anchoring length of a main reinforcing bar; a falling bridge prevention device(6) formed to be projected downward from the other lower side of a slab(1) and to have the appointed angle outward and covered with Styrofoam(10) having the appointed thickness to function as a form at a temporary construction work and to control the displacement of a bridge; and an abutment(4) located between the chest wall(2) and the falling bridge prevention device(6) and projected to support a slab(1) and provided with a shoe device(3) to cover up the left falling bridge prevention device(6), the right chest wall(2) and the lower abutment.