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引黄济青工程输水河建筑物452座,其中输水河倒虹及渡槽36座,穿输水河倒虹工程72座,跨河渡槽11座;涵闸85座;公路桥及生产、交通桥248座。近年来,部分闸墩、生产桥桥柱及倒虹迎水面出现不同程度的冻融破坏,有的破坏较为严重。因此,自1996年开始对建筑物冻融破坏的部位进行了修补。1 破坏原因及破坏情况1.1 破坏原因。冬季送水,受低温、(最低温度达—10℃以下)、风浪、水位不稳定等因素影响,建筑物处于水位变幅区部位经受冻融循环的次数较多,当冻融循环次数超过该部位混凝土的抗冻标号时,就发生了冻融破坏。有的建筑物施工
Yellow River Jiqing project 452 Water Conservancy River buildings, including inverted river and aqueduct 36, crossing the river transfiguration project to wear 72, crossing the aqueduct 11; Culvert 85; highway bridge and production, traffic bridge 248 seat. In recent years, some of the piers, the production of bridge pillars and inverted rainbow welcome to the surface of varying degrees of freeze-thaw damage, and some damage is more serious. Therefore, since 1996, the site of repair and maintenance of buildings has been repaired. 1 damage causes and damage 1.1 damage causes. In winter, due to the influence of low temperature (minimum temperature below -10 ℃), wind and waves, instability of water level and other factors, the number of buildings subjected to freezing and thawing cycles in the fluctuating area of the water level is large. When the number of freeze-thaw cycles exceeds this part Freeze-thaw damage occurred when the concrete’s antifreeze label. Some buildings construction