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南水北调工程辉县七标倒虹吸截面尺寸大,墙体厚,底板厚度达到1.2m,属于大体积混凝土施工,大体积混凝土因其施工难度较大,对结构的安全影响深远,一直是施工中的重要控制点,而其最易出现的问题是成品混凝土出现裂缝,从而导致混凝土的抗渗、抗裂性能下降,影响整体建筑物的永久性和安全性,特别对于倒虹吸这样有压运行的建筑物,更须做好预控措施,最大限度地防止裂缝的产生。
The South-to-North Water Diversion Project Huixian seven standard inverted siphon section size, wall thick, floor thickness of 1.2m, belonging to the mass concrete construction, mass concrete for its construction more difficult, has a profound impact on the structural safety has been the construction of Important control point, and its most prone to the problem is the finished concrete cracks, leading to impermeability of concrete, cracking resistance, affecting the overall construction of the permanent and safety, especially for reverse siphon pressure-run buildings Things, but also to do a good job of pre-control measures to maximize the prevention of cracks.