EXPANSION JOINT PREVENTING A FALLDOWN AND SECESSION OF BRIDGE

摘要

The present invention relates to the structure of the expansion joint for preventing the fall of the bridge deck and fall, more specifically, the bridge deck can prevent the fall caused by natural disasters and disasters to the maximum, and the fall prevention anchor at the joint of the bridge The present invention relates to an expansion joint structure for preventing falling and dropping of a bridge top plate having a structure to be installed and inserted into an anchor hole and to be installed with a bolt for preventing falling.;The present invention, in the joint structure of the bridge consisting of pier, coping, bridge device, prestressed concrete beam, concrete slab and joint, each of the expansion joint body 1, 2 is buried in the joint of the upper plate of the bridge, The expansion joint body 1 has a joint anchor formed at its rear surface, and the expansion joint body 1 has protrusions 1 and 2 protruding from the expansion joint body 1 at a constant interval to the top, and the expansion joint body 1 has a protrusion portion. It is formed in a structure in which the projecting portion 3 is projected downwardly orthogonally in contact with 2, and the expansion joint body 1 has a gap portion formed therein with protrusions 1, 2 formed therein, and the anchor hole has four rectangular structures in the gap portion. The expansion joint body 2 has a joint anchor formed in a direction opposite to the expansion joint body 1 on the rear face thereof, while the expansion joint body 2 has a lattice structure. The expansion joint body 2 has an upper surface bent at an angle of 90 ° and the lower surface is formed in a stepped shape, and the expansion joint body 2 has a plurality of anti-falling anchors in a rectangular column shape on the lower side of the front side. The through-hole is formed in each of the protrusions 3 and the expansion joint body 2 of the expansion joint body 1 and the fastening bolts made of stainless steel are fastened by the anti-falling chain, and the expansion joint body 1 and the expansion joint body 1 are installed. The expansion joint body 2 is firmly coupled by the anti-falling chain, and the anti-falling chain is connected to the chain rings on both sides, and the anti-falling chain is formed with a chain on the inside and special on the outside. It provides a stretch joint structure for preventing falling and separation of the bridge top plate, characterized in that the structure formed a rubber layer.