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隧道有仰拱和仰拱回填一起浇筑的吗？有相关规范吗? - 工程施工 - 项目管理 - 氿上知道
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满意答案
（1）标号不同，标号不同的混凝土是不能同时施工的；
（2）规范上有明确的规定；
（3）同时施工改变了受力状态，仰拱是和二衬形成一个环形，填充故名思义了，只起一个传递荷载的作用。所以前面说的提高填充标号，从经济上和受力的角度都是不可取的。
为了加快仰拱填充的施工进度，可以等仰拱终凝后再进行填充施工，特别是地质条件较差的（如黄土）隧道，切忌不能同时施工。
特别的书
回答于：2013-11-07
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