铁路填石路堤施工质量控制技术研究
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摘要
伴随我国铁路建设的飞速发展,越来越多的填石路堤已出现在我国山区铁路的建设中。在填石路堤填筑所面临的困难中,填石路堤经济合理的施工技术和简捷高效的质量控制方法是亟待解决的关键问题。本论文以中铁第二勘察设计院和西南交通大学土木工程学院联合承担的科研项目“结合贵阳至广州铁路硬质岩石填料填筑路堤关键技术研究”为依托,通过开展填石路堤现场压实试验以及施工质量检测试验,深入研究了填石路堤的施工质量控制技术。
     本文首先归纳和分析了国内外水利行业的堆石坝工程和公路部门已有的相关成果,以及填石路堤的技术现状和发展趋势,接着研究了填石料的工程特性、压实特性及破碎性,从理论上分析了填石路堤的压实方式、振动压实机理以及填石路堤的变形特征。本文通过现场压实试验系统地研究了摊铺与整平技术、振动压实技术和最优碾压参数控制等填石路堤填筑过程中的关键性技术问题。同时,通过开展现场施工质量检测试验,深入研究了填石路堤压实质量控制原理及方法,解决了填石路堤施工质量检测方法和控制标准等难题。此外,通过一元线性回归法分析得到了填石路堤施工质量检测指标中较重要的两个指标——地基系数Ks和动态变形模量Evd之间的相关关系。
     最后,总结提出了适合铁路填石路堤施工质量控制的技术方法(包括填石路堤的填筑过程中的施工参数控制和碾压完成后的质量检测方法控制),为填石路堤在铁路部门的研究奠定了一定的基础。
With the rapid development of China railway construction, there have been more and more rock-fill embankment in mountain railway construction in China. The difficulty faced in rock-fill embankment, economical construction techniques and quality control method for simple and efficient is the key issues that must be solved.In this paper, thoroughly discussed are Quality Control Technology of Rock-fill Embankment Construction based on the joint research project," Key Technologies Study of Guiyang-Guangzhou Railway Hard Rock-fill Embankment ",by China Railway Second Survey and Design Institute Group Ltd and School of Civil Engineering,Southwest Jiaotong University.
     In this thesis, first summary and analysis of rock-fill dam engineering of water resources industry and road sector at home and abroad have relevant results, as well as the technical situation and development trend of rock-fill embankment. Went on to study on the engineering properties, compaction characteristics and fragmentation of rockfill, in theory analysis of rock-fill embankment compaction and vibratory compacting mechanism and characteristics of rock-fill embankment deformation. This paper through the field compaction test system research of the rock-fill embankment of key technical problems in the process, such as spreading and leveling technology, vibratory compaction technology and optimal control roller compaction parameters. At the same time, through on-site construction quality testing, in-depth study of rock-fill embankment compaction quality control principles and methods, to solve the rock-fill embankment construction quality detection method and control standards and other technical problems. In addition, we can find the correlation between Ks and Evd, the important quality indicators of rock-fill embankment construction, by the unary linear regression analysis.
     Finally, made the technology of rock-fill embankment construction quality control methods for railway and laid a certain foundation for the study on rock-fill embankment of the railway sector.
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