武汉市快速路与主干道长寿命路面结构研究

发布时间：2018-02-24 01:06

本文关键词： 长寿命路面武汉市设计指标结构设计大粒径透水性沥青混合料　出处：《武汉工程大学》2014年硕士论文　论文类型：学位论文

【摘要】：武汉市气候条件复杂、车辆超载严重，已经建成的快速路与主干道沥青路面早期破损严重，而近年来武汉市正处在交通升级和转型的建设关键时期，如何在关键时期提高道路的使用性能，尽量避免路面结构病害的发生，减少道路维修引起的交通阻塞，如何延长道路的使用寿命成为现阶段急需解决的问题。鉴于此，引入长寿命沥青路面的设计理念，结合大粒径透水性沥青混合料路用材料，通过理论分析、结构计算及室内试验对组合式基层长寿命沥青路面结构进行研究分析。确定了长寿命沥青路面的设计指标及其设计容许值。根据沥青路面不同的损坏将其破坏模式分为裂缝及变形两大类，在国内外长寿命沥青路面设计指标研究的基础上，选取与破坏模式对应的设计指标，并确定了该设计指标的容许值。初步拟定了武汉市快速路与主干道长寿命路面结构。结合武汉市的环境特点，考虑到排水与抵抗普通半刚性基层沥青路面反射裂缝的问题，采用大粒径透水性沥青混合料作为柔性基层，初步拟定了组合式基层长寿命沥青路面结构。分析了组合式长寿命沥青路面的受力状况及配套的筑路材料的路用性能。基于弹性层状理论体系，，模拟初拟的路面结构，分析了各结构层厚度的变化对组合式基层长寿命路面结构受力的影响，在此基础上，推荐了武汉市长寿命沥青路面结构；通过室内试验，完成了配套的筑路材料大粒径透水性沥青混合料的级配设计和沥青最佳用量的确定，并分析了该筑路材料的路用性能。
[Abstract]:Wuhan city climate condition is complex, serious overloading of vehicles, early road and roads on the asphalt pavement seriously damaged, but in recent years, Wuhan city is in a critical period of upgrading and transformation of traffic construction, how to improve the performance of the road during the critical period, try to avoid the occurrence of pavement structure, reduce road maintenance caused by traffic blocking, the urgent need to resolve problems as how to prolong the service life of the road. In view of this, the design concept of long-life asphalt pavement, combined with large stoneporous asphalt mixture material, through theoretical analysis, structure calculation and laboratory test of composite long-life asphalt pavement structure was analyzed.
To determine the allowable value of design index and design of long-life asphalt pavement. According to the different damage of asphalt pavement crack and deformation failure mode is divided into two categories, both at home and abroad based on long life asphalt pavement design index and design the index selection and corresponding failure mode, and determine the allowable design index. Value.
The initial development of the Wuhan City Road and the main road long life pavement structure. Combined with the environmental characteristics of Wuhan City, considering the drainage resistance and reflection crack of asphalt pavement common semi-rigid base, with large stoneporous asphalt mixture as the flexible base, the initial development of the combination of long-life asphalt pavement structure.
By the way of road construction materials and supporting force performance of composite long-life asphalt pavement is analyzed. Based on elastic layered system, pavement structure simulation of the preliminary analysis, the thickness of the structure changes on the effects of combined base of perpetual pavement structure stress, on this basis, recommended Wuhan the service life of asphalt pavement; through laboratory tests, completed to determine the supporting materials of large stoneporous asphalt mixture gradation design and optimum asphalt content, and analyzed the materials with properties of road.

【学位授予单位】：武汉工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.2

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