从广义上说,管道工程几乎都是用管子接口把工厂予制的短节管材衔接起来构成的,既使是现浇混凝土管道,也要在适当的距离留有接头。因为,管道本身是一种线性构筑物,从施工或制造工艺考虑,管道接口的衔接,是不可少的。此外,管道在工作态状下,柔性接口还起着温度变形,地基不均匀沉降,以及、对冲击震动变形的调节作 In a broad sense, most of the pipeline projects are made up of pipe joints connecting the factory-prepared short-joint pipes. Even if they are cast-in-place concrete pipes, they must have joints at appropriate distances. Because the pipeline itself is a kind of linear structure, the connection of the pipeline interface is indispensable from the consideration of construction or manufacturing process. In addition, under the working condition of the pipeline, the flexible interface also plays a role in temperature deformation, uneven foundation settlement, and adjustment of impact vibration deformation.