WATERTIGHT TYPE BRIDGE EXPANSION JOINT STRUCTURE

摘要

The present invention relates to a bridge expansion joint structure having improved watertightness, which maximizes an effect of preventing leakage of rainwater by making both ends of a drain sheet come into close contact with a wall surface of a body frame of the expansion joint structure. To this end, an expansion joint structure comprises: a pair of body frames (10) each having a finger plate (20) provided on an upper portion thereof; an anchor (15) provided on the outside of the body frame (10) and fixedly embedded in a bridge slab (1); and a drain sheet (40) connecting the body frames (10). Watertight sheets (50) are coupled to both the body frames (10). The drain sheet (40) connects the watertight sheets (50). The watertight sheets (50) have holding protrusions (51) such that wing portions (41) symmetrically provided on both sides of the drain sheet (40) are held thereon. The wing portions (41) have a plurality of protrusion portions (41a) protruding in a sawtooth shape to reinforce adhesion with the holding protrusions (51).