伸缩装置是桥梁上部结构最为薄弱的部位,伸缩装置要满足桥梁上部结构变形的需要,其质量的好坏是减少工后养护工作,保证行车安全、舒适的关键。因此在高速公路建设过程中,大跨径桥梁伸缩装置的设计和施工质量控制至关重要。本文以已竣工运营的大跨径三塔斜拉桥工程为实例,介绍了伸缩缝的设计和施工控制,供采用该类型伸缩缝的大跨径桥梁参考。 Telescopic device is the weakest part of the bridge superstructure, telescopic device to meet the needs of the deformation of the bridge superstructure, its quality is to reduce post-maintenance work, to ensure traffic safety and comfort of the key. Therefore, in the process of highway construction, the design and construction quality control of the long-span bridge expansion and contraction device is very important. In this paper, the construction and operation of expansion joints are introduced in this paper. The long-span three-pylon cable-stayed bridge with completed operation is taken as an example to provide a reference for the long-span bridges with this kind of expansion joints.