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多雨地区高等级公路透水基层结构与材料研究
Study on Structure and Material of High-Grade Highway on Permeable Base Layer in Rainy Area
【作者】 蒋克文；
【导师】 杨斌；
【作者基本信息】 广西大学 ， 岩土工程， 2008， 硕士
【摘要】 在路面结构内部设置透水基层,将极大改善路面结构的使用性能和延长道路使用寿命。论文从路面水损坏的原因入手,对两种透水基层材料进行了试验研究和结构力学分析。对水泥稳定碎石透水材料和沥青稳定碎石透水材料组成进行了室内试验设计。对两种透水材料的透水性能、力学性能进行了各种因素的影响分析,研究了其变化规律。提出了两种透水材料的评价指标。利用多目标决策方法——TOPSIS方法对透水材料组成进行了综合评价,验证了该方法的有效性。本文进行了沥青稳定碎石透水基层水泥混凝土路面结构在车轮荷载作用下应力分析的初步探索,在面层和透水基层参数变化的情况下,利用ANSYS软件分析得出路面结构荷载应力的变化规律。基层反射裂缝在沥青路面裂缝中占有很大的比例,本文研究了两种透水基层裂缝对沥青路面的影响,判断出沥青稳定碎石透水基层对沥青路面反射裂缝的影响要小于水泥稳定碎石透水基层。并对水泥稳定碎石基层沥青路面结构提出了改进措施。
【Abstract】 Improving the working performance of the pavement structure and prolong the pavement service life will be expected by setting up the permeable base layer in the interior of pavement structure. Based on the water damage factor of pavement, the experimental study and structure mechanics analysis on two kinds of permeable base layer material is developed in this thesis.An laboratory on the cement stabilized crushed stone permeable material and the asphalt stabilized crushed stone permeable material has been designed. It shows influence factors on the water permeability and mechanics performance of two kinds of materials, its change rules etc. Some evaluation indexes on these permeable materials are proposed. An quality synthetic evaluation to the permeable material composition is proposed by the Multi-objective decisionmethod------TOPSIS method. Experiments shows the proposed method iseffective.An initiatory study on the stress analysis of cement concrete pavement with asphalt stabilized crushed stone permeable under vehicular load: a change rule of structure load stress with different slabs and permeable base layers computed by ANSYS is showed in this thesis. The base reflection crack holds the very great proportion in the asphalt pavement crack, the influence of two kinds of permeable base layer crack to the asphalt pavement is discussed. It concludes that the influence to asphalt pavement reflection crack caused by asphalt stabilized crushed stone permeable base is less than the one caused by cement stabilized crushed stone permeable base. And an improving measure to the asphalt pavement structure with cement stabilized crushed stone base layer is proposed in this thesis.