Bridge expansion joint device and application of bridge expansion joint device in bridge expansion joint treatment project

The invention discloses a bridge expansion joint device which comprises a static plate, a movable plate and high-strength bolts. The static plate and the movable plate are fixed to the positions, on the two sides of a joint, of a bridge through the high-strength bolts. The static plate comprises a fixed part I, a rack part I, a bottom plate I and a cover plate, wherein the cover plate partially covering the rack part I is fixed to the rack top portion on the other side opposite to the bottom plate I, and an insertion space is formed. The movable plate comprises a fixed part II, a bottom plateII and a rack part II, wherein the bottom plate II partially covers the corresponding rack part, and the front end portion of the rack part II is inserted in the insertion space in the rack part I. Arack engagement structure is adopted between the movable plate and the static plate which are densely matched, no redundant joint exists, and dust is unlikely to be accumulated in the position of thejoint. The joint formed aft