论文部分内容阅读
严密地说,隧洞建筑从开始到如今进入全盘机械化施工的时代,从来就是一个技术性问题。长期以来,人们对于施工技术一直争论不休。其中,喷射混凝土的施工方法和施工质量就是工程技术人员之间意见未必一致的问题之一。通常认为:混凝土的喷射厚度越大,效果就越好,但这种观点是错误的。超过规定的厚度,不仅不经济,而且质量也变差。一混凝土的喷射厚度喷射混凝土施工,关键不是厚度,而是混凝土的粘着力。除非混凝土的水灰比特别小,
Strictly speaking, the tunnel construction from the beginning to now the era of full mechanized construction has always been a technical issue. For a long time, people have been talking about construction technology endlessly. Among them, the construction methods and construction quality of shotcrete is one of the problems that engineers and technicians may not agree on. Generally believed that: the greater the thickness of the concrete spray, the effect is better, but this view is wrong. Exceeding the required thickness not only is not economical but also deteriorates in quality. A spray of concrete thickness jet concrete construction, the key is not the thickness, but the adhesion of concrete. Unless the concrete water-cement ratio is particularly small,