Anchor width of the expansion device.
Need to sew steel reinforcement embedded in the beam (plate) specification expansion anchor width end and the abutment.
Anchorage reinforcement of the expansion device.
In the precast beam (plate) and the end of the back wall embedded within the expansion device of anchor bars is carried out in two different conditions。 The general design is given to the width of the bridge in the center of symmetry, beam (plate) is arranged on the end of the pre buried steel, reinforced in each beam (plate) in the the embedded position is not the same, to increase the difficulty of construction, so the anchor bars should be symmetrical to each piece of beam (plate) of the center set, this should be considered in the design。
At present, China's highway construction in some more expansion device type, common type rubber joints, teeth plate joints, Xi'an SD II - 80 type expansion joint, Hengshui XF 80 imitation molorexpansion joint, the Wanbao expansion joints, expansion joints and Germany TST thermoplastic elastomer and gravel filling type telescopic device etc。 are analyzed according to various expansion device usage status and scope of the expansion device the most economical and reasonable。