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黑龙江省海伦县属高寒冻土区,修建灌排渠系交叉工程,从多年实践看,倒虹吸是一种很适用的建筑结构型式,在建设中他们有以下几点经验: 一、倒虹吸进出口竖井,要采取土方大裹头的办法处理,以防圬工部分与土渠接头冻裂而造成春灌决口。二、倒虹吸管埋深要达到当地最大冻深时,管内仍有三分之一高度的水层不结冻,这可保证春灌时,水流在很短时间内将管内冻结冰层融化,不误通水。
Helen County, Heilongjiang Province is an alpine frozen area, the construction of irrigation and drainage canal cross-engineering, from many years of practice, inverted siphon is a very suitable type of building structure, in the construction they have the following experience: First, inverted siphon Export shaft, to take a large earth and mud way to deal with to prevent leakage part of the mortar joints with the canal caused by frostbite spring irrigation burst. Second, the inverted siphon depth to reach the maximum depth of the local deep, the tube is still one-third of the height of the water layer is not frozen, which can ensure that spring irrigation, the water flow in a very short period of time to freeze the ice within the tube is not wrong Water.