管道接口是输水管道的组成部分,它的功能是把众多的单一管材及其他部件相互连接,构成一个完整的输水管道系统。由于管接口数量多并有较大的施工难度,所以是决定管道工程质量和经济造价的关键部位。农田灌溉地下输水管道接口部位作为管道的一个组成部分同样要承受地面荷载,因此,对地基变形应有一定的适应能力,特别是在有压输水运用下,要求接口能承受一定的内水压力和足够的抗渗能力。目前,国内农田地下输水、排水管道的接口处理办法,主要是沿用传统的水泥砂浆 The plumbing interface is an integral part of the plumbing and its function is to connect a large number of individual tubes and other components to each other to form a complete plumbing system. Due to the large number of pipe connections and greater difficulty in construction, it is the key part that determines the quality of pipeline construction and economic cost. As an integral part of the pipeline, the interface of irrigation pipelines in underground irrigation also needs to bear the ground load. Therefore, it is necessary to adapt to the deformation of foundation. Especially under the condition of pressurized water conveyance, it is required that the interface can withstand a certain amount of internal water Pressure and adequate impermeability. At present, the domestic farmland underground water, drainage pipe interface approach, mainly follow the traditional cement mortar