当前公路交通事业迅速发展,修建了大量的高速公路、高架公路、立交桥,随着交通量的不断增大,行驶速度的加快,荷载的加重,对桥梁伸缩装置的要求越来越高。因此作为桥梁整体来说,桥梁伸缩装置是桥梁的重要组成部分,它在伸缩、承重、防水、平整等方面所具有的功能,会直接影响到桥梁的整体功能和寿命。 With the rapid development of road transport, a large number of expressways, viaducts and overpasses have been constructed. With the continuous increase of traffic volume, speeding up of traffic and heavier loads, demands for bridge expansion devices are getting higher and higher. Therefore, as a whole bridge, the bridge expansion and contraction device is an important part of the bridge. Its function in expansion, load-bearing, waterproofing and leveling has a direct impact on the overall function and life span of the bridge.