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桥梁伸缩缝是为适应桥梁结构的变形,在桥梁结构物一联的梁端之间,以及梁端与桥台背墙之间设置的能自由变形的跨缝装置,其作用是使桥梁结构物在气温变化及混凝土收缩、徐变,以及活载作用等因素的作用下,能自由伸缩,使汽车行驶舒适、平顺、防水、防泥砂杂物进入缝内。伸缩缝的合理选择及施工安装质量的好坏,对保证公路运输的安全、快速、舒适至关重要,并直接影响到桥梁的使用寿命及公路的经济性。
Bridge expansion joint is to adapt to the deformation of the bridge structure, between the bridge structure of a joint beam ends, as well as between the beam end and abutment back wall set free to cross-seam deformation device, its role is to make the bridge structure In the temperature changes and concrete shrinkage, creep, and the role of live load and other factors, can free expansion, the car driving comfortable, smooth, waterproof, anti-debris debris into the seam. The reasonable choice of expansion joints and the quality of the construction and installation quality are crucial to ensure the safety, speed and comfort of road transport and directly affect the service life of the bridge and the economy of the road.