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在水工建筑中混凝土的广泛使用,要求着提高质量降低成本和有着更快的建筑进度的新的工业施工方法。真空作业就是这类方法中的一种,它能改善混凝土的一些水利技术上的性质:抗渗性、耐冻性、强度和耐磨蚀性等等。例如,许多试验室和工地的实验资料指明:混凝土经过真空作业之后,其耐冻和耐磨蚀的能力提高到原有的2.5倍。齐姆良和古比雪夫水利枢纽的工作经验,同样充分证实了经过真空作业的混凝土的质量的提高。这两个工地由於进行真空作业,故能采用低标号的混凝土以浇灌水工结构中的重要构件。例如,在古比雪夫水利枢纽,按原计划对下游水闸底版进行真空作业,只需用‘170 B-4 M-
The widespread use of concrete in hydraulic construction requires new methods of industrial construction that increase quality and reduce costs and have faster construction schedules. Vacuum work is one of these methods that improves some of the water conservancy technical properties of concrete: impermeability, freeze-thaw resistance, strength and abrasion resistance and more. For example, many laboratory and site experimental data indicate that the ability of concrete to withstand freezing and abrasion after vacuum operations is 2.5 times greater than its original capacity. The work experience of the Qimiliang and the Kuibishe water complex also fully confirmed the improvement of the quality of the vacuum-worked concrete. Due to the vacuum operation of these two sites, low-grade concrete can be used to irrigate the important components of the hydraulic structure. For example, at the Kuibishe Water Control Project, vacuuming of the downstream sluice floor as originally planned was accomplished using the ’170 B-4 M-