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1、 分类号：U45 10710.20101210902010121186 硕 士 学 位 论 文 公路隧道装配式衬砌结构研究 郇星超 导师姓名职称 夏永旭 教授 申请学位级别 工学硕士 学科专业名称 桥梁与隧道工程 论文提交日期 2013 年 4 月 25 日 论文答辩日期 2013 年 6 月 14 日 学位授予单位 长安大学 Prefabricated lining structure research of highway tunnel A Dissertation Submitted for the Degree of Master Candidate：Huan xingchao Sup
2、ervisor：Prof. Xia yongxu Changan University, Xian, China I 摘 要 随着社会文明的不断发展，人们越来越关注工程建设中的速度、质量以及施工环境等问题。在公路隧道软弱破碎围岩施工过程中，如何尽快紧跟掌子面，封闭围岩，发挥支护结构的功能，安全快速的通过软弱破碎段，是保障施工顺利进行的关键。现行的公路隧道施工存在施工速度慢，劳动强度大，施工环境恶劣等问题，而装配式衬砌在公路隧道软弱破碎围岩施工中有着独特的优点，研究公路隧道装配式衬砌的力学特性很有必要的。 本文首先，根据国内外公路隧道和盾构隧道的设计方法及研究成果，介绍了隧道及地下结构设计的力学
3、计算模型，确定了本文所用的计算方法。 其次，依据公路隧道二车道建筑标准，采用数值模拟，对比分析了 40cm、45cm 及50cm 厚衬砌的力学特性，确定 45cm 为公路隧道的装配式衬砌合理厚度。 再次，按照“综合考虑结构受力和优化配置安装运输等因素”的原则，提出 5 种衬砌构件划分方案，通过结构特性对比，推荐方案 2 为最佳构件划分方案。 最后，在推荐的衬砌构件划分方案基础上，对装配式衬砌环向接缝抗弯刚度、围岩弹性抗力系数、砌块幅宽及厚度变化状况下，隧道衬砌结构的变形和内力的变化规律进行了研究，验证了公路隧道装配式衬砌结构的可靠性。 关键词：公路隧道，新奥法，装配式衬砌，数值模拟，力学特性
4、II Abstract With the continuous development of social civilization, people are increasingly paying attention to engineering construction speed、quality and construction environment and other problems. In construction process of highway tunnel that surrounding rock is soft and broken, how to follow tu
5、nnel face to close surrounding rock as soon as possible, how to bring the function of supporting structure into play and get through soft and broken quickly and safely, is the key to safeguard construction proceeding smoothly. The current tunnel construction is slow and labour-intensive, and the con
6、struction environment is very bad and so on. But prefabricated tunnel lining has its unique advantages in soft and broken surrounding rock. It is very necessary to study mechanical properties of prefabricated highway tunnel lining . In this paper, first of all, according to the design method and the
7、 research results of highway tunnel and shield tunnel at home and abroad,the mechanical calculation model of tunnel and underground structure design is introduced, and the calculation method used in this article is determined. Secondly, based on the construction standards of two lane highway tunnel
8、through numerical simulation and comparative analysis of stress and deformation of lining thickness of 40 cm, 45 cm and 50 cm,45 cm is identified as the reasonable program of assembled lining of highway tunnel. Thirdly, according to the component divided principle of comprehensive considering factor
9、s such as structure stress and optimizeing configuration of component installation and transportation, the five primary partition plan of component is put forward. The scheme 2 is determined as the best scheme for dividing by comparison with structural characteristics. Finally, based on the recommen
10、ded scheme of the lining component, the variation regularity of deformation and internal force of tunnel lining structure is analysed and discussed along with the change of bending stiffness of spring and elastic resistance coefficient of surrounding rock and width conditions of component,proving th
11、e reliability of prefabricated lining structure of highway tunnel. Key words: highway tunnel, NATM, assemble lining, numerical simulation, mechanical properties III 目目 录录 第一章 绪论 . 1 1.1 研究背景及意义 . 1 1.2 隧道装配式衬砌 的研究现状 . 2 1.3 公路隧道装配式衬砌涉及的问题 . 5 1.3.1 衬砌结构形式的选定 . 5 1.3.2 预制构件材料 . 5 1.3.3 预制构件标准化 . 6 1.3.4 预制结构形式及构件类型 . 6 1.3.5 构件的合理划分 . 7 1.3.6 构件接头结构及防水 . 7 1.3.7 构件的制作与安装 . 9 1.4 本文研究的内容 . 9 第二章 装配式衬砌结构理论与计算模型 . 10 2.1 隧道及地下结构计算理论的发展 . 10 2.1.1 刚性结构阶段 . 10 2.1.2 弹性结构阶段 .
