重载交通沥青路面动力响应分析

发布时间：2018-06-28 10:57

本文选题：半刚性基层 + 级配碎石　；参考：《河北工业大学》2015年硕士论文

【摘要】：公路上车辆超载现象日益严重,超载车辆比例和轴载等级不断提高。在大量超载车辆的作用下,公路建成后易出现早期破坏,须进行大规模维修或重建。主要原因是,传统沥青路面设计对重载交通作用下沥青路面结构受力分析考虑不全面,对重载交通下沥青路面材料力学特性研究尚不完善。本文结合河北省重点项目滦海公路工程,基于理论分析、仿真模拟和工程实践,分析重载交通对沥青路面结构的影响。依据滦海公路旧路交通量及轴载调查结果分析交通组成和主要车型轴载谱;调查滦海公路旧路路面病害情况,对路面病害产生原因进行分析;利用ABAQUS6.10-1软件建立移动荷载作用下的级配碎石柔性基层沥青路面结构有限元模型,研究级配碎石柔性基层沥青路面结构在移动重载作用下的动态响应规律,为柔性基层沥青路面结构设计提供理论支持;建立路基拓宽模型,对路基拓宽后新旧路基不均匀沉降的变化规律进行分析,研究移动重载作用下拓宽路基结构内部应力应变特性,为改扩建道路设计提供参考;最后通过对比移动重载作用下不同路基结构动力响应情况,为路基拓宽结构设计提供理论依据。
[Abstract]:The overloading of vehicles on the highway is becoming more and more serious, and the proportion of overloaded vehicles and the grade of axle loads are increasing. Under the action of a large number of overloaded vehicles, the highway is prone to early damage after completion, and must be repaired or rebuilt on a large scale. The main reason is that the traditional asphalt pavement design does not fully consider the stress analysis of asphalt pavement structure under heavy traffic, and the study on mechanical properties of asphalt pavement materials under heavy traffic is not perfect. Based on the theoretical analysis, simulation and engineering practice, this paper analyzes the influence of heavy load traffic on asphalt pavement structure in combination with Luanhai Highway Project, a key project in Hebei Province. According to the investigation results of traffic volume and axle load of the old road in Luanhai Highway, the traffic composition and the axle load spectrum of the main vehicles are analyzed, and the road surface diseases of the old road of Luanhehai Highway are investigated, and the causes of the road surface diseases are analyzed. The finite element model of asphalt pavement structure of graded macadam flexible base under moving load is established by Abaqus 6.10-1 software, and the dynamic response law of asphalt pavement structure with graded crushed stone flexible base under moving and heavy load is studied. It provides theoretical support for structural design of flexible base asphalt pavement, establishes roadbed widening model, and analyzes the variation law of uneven settlement of new and old subgrade after roadbed widening. The characteristics of stress and strain in widening roadbed structure under moving and heavy load are studied to provide reference for road reconstruction design. Finally, dynamic response of different subgrade structure under moving and heavy load is compared. It provides a theoretical basis for the design of roadbed widening structure.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.217

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