taptap点点手机网页 ›› 2022, Vol. 40 ›› Issue (5): 23-30.

• 民用航空 • 上一篇    下一篇

抑制反射裂缝的装配式复合路面接缝性能研究

赵鸿铎1a,1b,夏昶1a,1b,付夕原1a,1b,赵举飞2,马鲁宽1a,1b   

  1. (1.同济大学a.道路与交通工程教育部重点实验室;b.民航飞行区设施耐久与运行安全重点实验室,上海201804;2.长江勘测规划设计研究院,武汉430010)
  • 收稿日期:2022-01-13 修回日期:2022-03-13 出版日期:2022-10-15 发布日期:2023-10-27
  • 作者简介:赵鸿铎(1976—),男,浙江宁海人,教授,博士,研究方向为机场道面结构设计.
  • 基金资助:
    国家自然科学基金项目(51978520)

Joint performance of precast composite pavement and reflection crack suppression

ZHAO Hongduo1a,1b , XIA Chang1a,1b , FU Xiyuan1a,1b , ZHAO Jufei 2 , MA Lukuan1a,1b   

  1. (1a. The Key Laboratory of Road and Traffic Engineering, Ministry of Education, 1b. The Key Laboratory of Infrastructure Durability and Operation Safety in Airfield of CAAC, Tongji University, Shanghai 201804, China; 2. Changjiang Institute of Survey, Planning, Design and Research, Wuhan 430010, China)
  • Received:2022-01-13 Revised:2022-03-13 Online:2022-10-15 Published:2023-10-27

摘要: 针对荷载型反射裂缝导致装配式复合路面使用寿命缩短的问题,基于弹性地基梁理论和疲劳损伤分析,推导了荷载作用下装配式复合路面接缝处沥青加铺层剪切应力和层底弯拉应力的计算方法,并分别构建了接缝处相邻板弯沉差和接缝宽度与荷载型反射裂缝扩展寿命的关系。研究结果表明:不同交通荷载等级下,通过合理设置相邻板弯沉差和接缝宽度可有效控制沥青层寿命;裂缝扩展寿命随接缝宽度和相邻板弯沉差增大而缩短,随沥青加铺层厚度增加而延长;给出了不同交通荷载等级下的初始相邻板弯沉差和接缝宽度的大小,并建议装配式复合路面沥青层厚度应不低于0.1m。研究成果可为装配式复合路面的进一步推广应用提供理论基础。

关键词: 道路工程, 接缝性能, 弹性地基梁理论, 装配式复合路面, 反射裂缝

Abstract: To prolong the service life of precast composite pavement, fatigue damage analysis and beam on elastic foundation theory are used for analyzing load-type reflection crack. Then, the relationship between adjacent plate deflection difference, joint width and the propagation life of load-type reflection crack is established by deriving the shear stress and bottom layer tensile stress of the asphalt overlay at the joints of precast composite pavement. The results show that the asphalt layer life can be effectively controlled through two factors: adjacent plate deflection difference and joint width. The crack extension life is shortened by increasing joint width and adjacent plate deflection difference and is extended by increasing asphalt pavement thickness. Finally, the initial value of plate deflection difference and joint width in different traffic load levels are delineated, the thickness of the asphalt layer should be greater than 0.1 m. In conclusion, this study establishes the grounds for the further application of precast composite pavement.

Key words: road engineering, joint performance, beam on elastic foundation theory, precast composite pavement, reflection crack

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