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本文介绍以可拔出重复使用的充水塑料软管为内模，以流态砼在地槽中直接灌注自流形成地下输水管道的技术。本技术的特点是：出水口间无接头，管道整体性好；管壁密实、均匀，含适量微气泡，抗渗性、抗冻性、耐久性好；管道内在光洁，糙率低，水流条件好；管道造价低；施工简单方便，极便于群众性大范围同时施工，有利于高速发展低压管道灌溉。
This article describes the technology to pull out the reusable water-filled plastic hose as an internal model to the flow of concrete in the trough direct infusion of gravity to form underground water pipelines. The technology is characterized by: no joint between the outlet, good overall pipeline; tube wall is dense, uniform, containing the right amount of micro-bubbles, impermeability, frost resistance, durability; pipe interior smooth, low roughness, Good; pipeline cost is low; construction is simple and convenient, convenient for large-scale construction of mass at the same time, is conducive to the rapid development of low-pressure pipe irrigation.