填方路基的雨水入渗及设计优化研究

发布时间：2018-02-27 10:28

本文关键词： 雨水入渗边坡生态防护中央分隔带排水整体式防排水方案　出处：《长沙理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：近年来,我国的公路建设快速发展,交通量大、车速高、载重大,也对路基路面的强度和稳定性提出了较高要求,但是,现有公路的路基路面因为降雨入渗问题而造成的公路病害越来越多,给国家造成直接和间接的经济损失和社会损失也越来越大。本文从降雨条件下路基的雨水入渗问题出发,针对填方路基边坡的雨水入渗和中央分隔带内雨水入渗两个方面进行研究,并提出了控制雨水入渗的优化设计,具体做了如下方面的工作:(1)在非饱和渗流理论的基础上,对边坡的降雨冲刷和入渗机理进行了研究,并提出了三种边坡的生态防护方法,即短管防护、水泥砂浆防护和土工布包砂防护,详细介绍了每种方法的结构型式和防护机理,然后,进行了室内模拟试验,根据试验结果对比分析了不同防护类型模拟边坡的雨水冲刷和雨水入渗变化,研究其减少雨水冲刷和入渗的能力,进而为生态边坡防护设计提供参考,使设计更加的合理,经济,环保,有效。(2)对中央分隔带雨水入渗造成的路基路面病害进行原因调查和机理分析,总结了目前中央分隔带排水设计常用方法,包括表面排水设计型式和地下排水设计型式,并对比分析了每种方法的优缺点,然后提出了一种整体式中央分隔带防排水设计方案,对施工工艺和技术要点进行了探索,最后,总结分析了该优化方案的创新点和技术优势。
[Abstract]:In recent years, the highway construction of our country develops rapidly, the traffic volume is large, the speed is high, the load is heavy, also put forward the higher request to the strength and stability of the roadbed and pavement, but, There are more and more highway diseases caused by rainfall infiltration of existing road subgrade and pavement, and the direct and indirect economic and social losses to the country are also increasing. This paper starts with Rain Water infiltration problem of roadbed under rainfall condition. This paper studies Rain Water infiltration of embankment slope and Rain Water infiltration in the central separation zone, and puts forward the optimal design to control Rain Water infiltration, and does the following work: 1) on the basis of unsaturated seepage theory, This paper studies the mechanism of rainfall erosion and infiltration of slope, and puts forward three kinds of ecological protection methods of slope, that is, short pipe protection, cement mortar protection and geotextile sand protection. The structure types and protective mechanism of each method are introduced in detail. Then, the indoor simulation test was carried out. According to the test results, the changes of Rain Water scour and Rain Water infiltration of different protection types of simulated slope were compared and analyzed, and the ability of reducing Rain Water scour and infiltration was studied. Then provide reference for ecological slope protection design, make the design more reasonable, economic, environmental protection, effective. 2) to the central separation zone Rain Water infiltration of subgrade and pavement disease cause investigation and mechanism analysis, This paper summarizes the current common design methods of central separator drainage, including surface drainage design and underground drainage design, compares and analyzes the advantages and disadvantages of each method, and then puts forward a design scheme of integral central separator drainage. The key points of construction technology and technology are explored. Finally, the innovation points and technical advantages of the optimization scheme are summarized and analyzed.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.1

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