沥青路面病害分析与加铺层处治方案研究

发布时间：2018-01-19 21:15

本文关键词： 沥青路面病害分析加铺层处治　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：本文在对国内外沥青混凝土路面常见病害处治方法研究的基础上，分析总结了坑槽、裂缝病害的破坏机理及处治建议，并结合某高速技改工程，系统研究了沥青稳定碎石基层的设计、施工及实际路用效果。本文结合江西省修建较早的樟吉、昌九、九景、澎湖、泰赣等高速公路的养护维修工程,,对其养护检测数据进行了统计分析，得出江西省沥青混凝土路面病害类型主要为坑槽和裂缝及其衍生病害。分析了坑槽、裂缝病害的产生机理，，并针对不同破坏类型制定了处治措施，为高速公路沥青路面的养护及大中修施工提供参考。从断裂力学的角度分析沥青层厚度、沥青层模量对裂缝发展的影响，从经济效率上综合考虑，推荐沥青稳定基层的厚度宜为16cm左右。在沥青稳定碎石混合料设计时，应采取措施通过添加改性剂、改变集料级配或混合料组成等方法提高混合料的抗变形能力，对防止加铺层反射裂缝有重要作用。研究沥青碎石基层的结构形式，在原有半刚性基层上或者弯沉值小轻度破损的路面上加铺内摩擦角及粘聚力均较大的骨架密实结构沥青碎石作为混合式基层。这种结构形式既充分利用了原路面基层，又克服了半刚性基层路面排水性能差、反射裂缝多引起从下而上破坏的缺点。沥青稳定碎石基层施工中，应对生产配合比进行认真调整。通过对筛孔设计、级配曲线的试配和抽提验证，确保沥青稳定碎石的级配曲线得到严格控制。沥青稳定碎石宜采用厚层摊铺，以确保沥青混合料骨架结构的充分构成，同时厚沥青层的适用有助于混合料的保温。
[Abstract]:On the basis of the research on common diseases and harmfulness of asphalt concrete pavement at home and abroad, this paper analyzes and sums up the damage mechanism of potholes and crack diseases and the treatment suggestions, and combines with a high speed technical reform project. The design, construction and actual road effect of asphalt stabilized macadam base are studied systematically. Based on the maintenance and repair works of Zhangji, Changjiu, Jiujing, Penghu, Tai-Gan and other expressways in Jiangxi Province, this paper makes a statistical analysis on the data of maintenance and inspection. It is concluded that the main types of asphalt concrete pavement diseases in Jiangxi Province are potholes and cracks and their derived diseases. From the angle of fracture mechanics, this paper analyzes the influence of asphalt layer thickness and asphalt layer modulus on crack development, and synthetically considers the economic efficiency from the point of view of fracture mechanics. It is recommended that the thickness of asphalt stabilized base should be about 16cm. In the design of asphalt stabilized macadam mixture, measures should be taken by adding modifier. It is very important to improve the anti-deformation ability of the mixture by changing the aggregate gradation or the composition of the mixture, which is very important to prevent the overlay reflection crack. The structure form of the asphalt macadam base is studied. On the existing semi-rigid base course or on the pavement with small deflection value and slightly damaged pavement, asphalt crushed stone with dense skeleton structure with high internal friction angle and cohesive force is overlaid as the mixed base course. This kind of structure makes full use of the original pavement. The grass roots. It also overcomes the shortcoming of poor drainage performance of semi-rigid base pavement, and reflection cracks often cause damage from bottom to top. In the construction of asphalt stabilized macadam base, the production mix ratio should be carefully adjusted, and through the design of sieve hole. The test and extraction verification of gradation curve ensure that the gradation curve of asphalt stabilized macadam is strictly controlled. The asphalt stabilized macadam should be spread with thick layer to ensure the sufficient composition of asphalt mixture skeleton structure. At the same time, the application of thick asphalt layer is helpful to heat preservation of mixture.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.217;U418.6

【参考文献】