倒虹吸管通常采用下埋预制混凝土管的方法施工,由于预制管强度低,耐久性差,运输不方便.接头常发生渗漏,而又不易检修。用薄铁皮做无支撑内模现场浇筑混凝土倒虹吸管,可以克服上述缺陷。由于无支撑内模倒虹吸管施工可以连续架设钢筋、支撑、浇筑、拆模,形成连续作业,无施工缝,内模还可以重复使用,是一种工艺简便、费用低、质量易于保证的施工方法,值得推广。 Inverted siphons are usually constructed using a method of laying a prefabricated concrete pipe under low pre-pipe strength, poor durability, and inconvenient transportation, often causing leaks in the joints and are not easily overhauled. Using thin metal skin to do unsupported internal mold pouring concrete inverted siphon, can overcome the above defects. Because of the unsupported inner mold inverted siphon construction can be continuously set up steel, support, pouring, demolition mold, the formation of continuous operation, no construction joints, the inner mold can be reused, is a simple, low cost, easy to ensure quality construction methods , Worth promoting.