桥梁伸缩装置是桥梁结构的重要组成部分,但由于它所占的工程费用不多往往被人们所忽视,长期以来没有很大改进和创新。因伸缩装置遭破坏或伸缩装置结构不当而影响桥梁正常运营的事也时有发生。随着我国社会主义建设事业的发展,尤其实行改革开放以来建造大跨径桥梁和连续式长桥越来越多,伸缩装置的落后状态就显得更加突出。 Bridge expansion device is an important part of the bridge structure, but due to its small engineering costs often overlooked by people, for a long time without much improvement and innovation. Occurrence of normal operation of the bridge due to the destruction of the telescopic device or improper structure of the telescopic device. With the development of our country’s socialist construction, especially since the reform and opening up, more and more large-span bridges and long-span continuous bridges have been constructed. The backwardness of the telescopic devices is even more prominent.