EXPANSION JOINTING APPARATUS FOR A BRIDGE AND IT'S CONSTRUCTION METHOD THEREOF

An expandable joint apparatus for a floor slab of a bridge and its construction method are provided to prevent a finger plate from separating from a fixing bracket by driving a bolt into a first fastening hole of the finger plate. An expandable joint apparatus comprises a fixing bolt(10), a fixing bracket(11), a rain water guide rubber(12), and a finger plate(13). The fixing bolt has a head(100) which is buried under the upper part of non-shrinkage concrete(3) poured on the end portion of a bridge slab(2). The fixing bracket is provided with a fastening hole formed at the center of an upper plate so that a body(101) of the fastening bolt is driven into the fastening hole. The fixing bracket is attached to the corner of the non-shrinkage concrete. The rain water guide rubber is attached to a lateral plate of the fixing bracket by a fixing bolt(120). The finger plate is mounted on the upper plate of the fixing bracket and the upper surface of the non-shrinkage concrete, provided with a first fastening hole(131), which is formed at the center of a finger(130), into which the fastening bolt is driven. A nut(10a) is fastened to the body of the fastening bolt to fix the finger to the fixing bracket. A second fastening hole(132) is formed at one end portion of the finger plate so that a fastening bolt is driven to a fixing member through the second fastening hole.