Bridge telescopic structure

The invention relates to the field of bridge structures, in particular to a bridge telescopic structure which comprises two edge beams installed on two bridge bodies respectively, a middle beam arranged between the two edge beams and a cross beam arranged below the middle beam. Sliding boxes are embedded in the positions, corresponding to the cross beams, of the side faces, corresponding to the expansion joints, of the two sections of bridge bodies, sliding mechanisms are arranged on the cross beams and comprise two telescopic pieces, and the two telescopic pieces are slidably connected to the cross beams in the direction perpendicular to the length of the expansion joints. And the telescopic piece can be inserted into the sliding box by sliding the telescopic piece. The telescopic device has the advantages that the construction efficiency is improved, and the influence on bridge deck traffic in the telescopic device replacing process is reduced. 本申请涉及桥梁结构领域，尤其涉及一种桥梁伸缩结构，其一种桥梁伸缩结构，包括两个分别安装在两段桥体上的边梁、设置在两个边梁之间的