行车荷载作用下含埋地管道沥青路面结构受力状况分析
A Stress Analysis of an Asphalt Pavement Structure with Buried Pipelines Under Traffic Load
  
中文关键词:埋地管道  沥青路面  数值模拟  应力值
英文关键词:buried pipeline  asphalt pavement  numerical simulation  values of stress
基金项目:
作者单位
许海亮 北方工业大学土木工程学院北京100144 
覃吉宁 北方工业大学土木工程学院北京100144 
任合欢 北方工业大学土木工程学院北京100144 
何炼 北方工业大学土木工程学院北京100144 
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中文摘要:
      城市沥青道路结构中,埋地管道(特别是浅埋管道)是路面结构受力的薄弱环节。基于弹性层状体系理论,利用有限元数值模拟软件建立含埋地管道的沥青路面结构计算模型,研究行车荷载与埋地管道耦合作用下沥青路面结构的受力状态变化。研究结果显示:①与无管道工况相比,埋地管道使得路面结构各层的弯沉值减小、竖向应力增大、水平应力减小;存在埋地管道时,浅埋管道对路面结构受力影响最大。②埋地管道对道路路面结构各层层底的竖向位移有较大影响,各层竖向位移随管道埋设的深度减小而减小,其变化幅值为14.0%~30.8%。由于管道材料强度高于路面材料,增大了管道埋设区域的弹性模量,使得路面结构强度均匀性发生改变,并对路面结构起到了一定的支撑作用,导致其力学响应存在差异。
英文摘要:
      In urban asphalt road structures, the buried pipeline (especially the shallowly buried pipeline) is usually the weak link of the pavement structure. In the light of the theory of the elastic layered system, a calculation model for an asphalt pavement structure with buried pipelines is established with the help of the finite element numerical simulation software in the paper to study the change of the stress state of the asphalt pavement structure under the coupled action of the driving load and the buried pipeline. The results of our research show that : ①Compared with the condition without buried pipelines, the buried pipelines cause the deflection value of each layer of the pavement structure to decrease, the vertical stress to increase and the horizontal stress of each layer of the pavement structure to decrease; when there is buried pipeline existing, the shallowly buried pipeline has the greatest influence on the pavement structure. ②The buried pipeline has a comparatively great influence on the vertical displacement of each floor of the road surface structure. The vertical displacement of each floor decreases with the decrease in the buried depth of the pipeline, with the variation amplitude ranging between 14.0% and 30.8%. As the strength of the pipeline material is higher than that of the pavement material, the elastic modulus of the pipeline buried area is increased, in which case the strength of the pavement structure is uniformly changed, which plays a supporting role to some extent for the pavement structure, and results in the difference in mechanical response.
许海亮,覃吉宁,任合欢,何炼.行车荷载作用下含埋地管道沥青路面结构受力状况分析[J].国防交通工程与技术,2019,17(5):24~28
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