沥青路面可靠性基础研究

发布时间：2019-05-11 20:48

【摘要】：沥青路面作为我国公路路面的主要结构形式，由于在设计、施工或使用过程中存在大量的不确定性因素，其可靠性问题尤为突出，主要表现在路面的使用性能不能够满足现代道路交通需求。因此，为使沥青路面的设计和施工更加趋于合理、完善，更好反映路面结构的实际状况，降低理论与实际的不吻合程度，对沥青路面可靠性进行研究尤其重要。本文在参考国内外相关研究成果的基础上，结合我国道路路面工程的特点，对沥青路面可靠性进行了较为系统的基础性研究，并取得以下主要成果：（1）在广泛调查研究国内外相关资料的基础上，分析了影响沥青路面可靠性的内部因素和外部因素，主要包括路面材料特性、路面结构设计、环境因素、车辆荷载、施工和养护水平等。各因素间相互关联、影响，甚至叠加，，导致了沥青路面的病害和破损。（2）结合路面结构的特点，在给出沥青路面的可靠性定义的基础上，分析了路面结构的三种极限状态：承载能力极限状态、结构损伤极限状态及正常使用极限状态，并给出了以弯沉和弯拉应力为控制指标的极限状态方程，为沥青路面可靠性分析奠定了基础。（3）提出了沥青路面模糊随机可靠性分析方法，并结合一工程示例，对沥青路面可靠性进行了分析。结果表明，当考虑路面的模糊性时，其可靠度比不考虑模糊性时有所降低，计算结果与工程实际更趋于一致。（4）结合影响沥青路面可靠性的因素，详细讨论了从结构、材料、施工及养护等几个方面来改善或提高沥青路面可靠性的措施，主要包括：合理改变沥青路面结构层厚度，改善结构层间连接、有效提高有机结合料的性能和集料的质量、改善沥青与矿料的黏附性、选择合适的沥青混合料类型、改善沥青混凝土面层的性能并适当采用新材料、加强施工作业质量控制、实施预防性养护等。
[Abstract]:Asphalt pavement, as the main structural form of highway pavement in our country, has a large number of uncertain factors in the process of design, construction or use, so its reliability is particularly prominent. The main performance of the road surface can not meet the needs of modern road traffic. Therefore, in order to make the design and construction of asphalt pavement more reasonable, perfect, better reflect the actual situation of pavement structure, and reduce the degree of inconsistency between theory and practice, it is particularly important to study the reliability of asphalt pavement. On the basis of referring to the relevant research results at home and abroad, combined with the characteristics of road pavement engineering in our country, this paper makes a systematic basic research on the reliability of asphalt pavement. The main results are as follows: (1) on the basis of extensive investigation and study of relevant data at home and abroad, the internal and external factors affecting the reliability of asphalt pavement are analyzed, including pavement material characteristics and pavement structure design. Environmental factors, vehicle load, construction and maintenance level, etc. The factors are interrelated, affected and even superimposed, which leads to the disease and damage of asphalt pavement. (2) according to the characteristics of pavement structure, on the basis of giving the definition of reliability of asphalt pavement, three kinds of limit states of pavement structure are analyzed: the limit state of bearing capacity, the limit state of structural damage and the limit state of normal use. The limit state equation with deflection and tensile stress as the control index is given, which lays a foundation for reliability analysis of asphalt pavement. (3) the fuzzy random reliability analysis method of asphalt pavement is put forward, and the reliability of asphalt pavement is analyzed with an engineering example. The results show that when the fuzziness of pavement is considered, the reliability is lower than that without fuzziness, and the calculated results are more consistent with the engineering practice. (4) combined with the factors that affect the reliability of asphalt pavement, the measures to improve or improve the reliability of asphalt pavement from the aspects of structure, material, construction and maintenance are discussed in detail, including: reasonably changing the thickness of asphalt pavement structure layer, Improve the interlayer connection of the structure, effectively improve the performance of the organic binder and the quality of the aggregate, improve the adhesion between asphalt and mineral, select the appropriate type of asphalt mixture, improve the performance of the asphalt concrete surface layer and adopt the new material properly. Strengthen the quality control of construction operation, carry out preventive maintenance and so on.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.217

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