The main studying contents of this thesis are optimization-design of the mixture ratio of tunnel's secondary lining concrete and internal structural analysis.
本文的主要研究内容为隧道二次衬砌混凝土配合比优化设计及其结构内力分析。
The design of the mixture ratio of the cement stabilized sand and gravel is one of the critical links to ensure the whole quality of the asphalt pavement on semirigid base course.
水泥稳定砂砾混合料的配合比是保证半刚性基层沥青路面整体质量的关键环节。
Also introduced here are the mixture ratio and design of pavement, base, sub-base, sub-seal and old road strengthening for typical pavement structure of different road classes in Zhengzhou.
同时，还对近阶段郑州市不同道路等级典型路面结构的面层、基层、底基层、下封层和旧路补强的配比和设计作了详细的介绍。
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