Joint performance of precast composite pavement and reflection crack suppression

Journal of Civil Aviation University of China ›› 2022, Vol. 40 ›› Issue (5): 23-30.

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Joint performance of precast composite pavement and reflection crack suppression

ZHAO Hongduo^1a，1b , XIA Chang^1a，1b , FU Xiyuan^1a，1b , ZHAO Jufei ² , MA Lukuan^1a，1b

（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

Abstract

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

CLC Number:

ZHAO Hongduo , XIA Chang , FU Xiyuan , ZHAO Jufei , MA Lukuan. Joint performance of precast composite pavement and reflection crack suppression[J]. Journal of Civil Aviation University of China, 2022, 40(5): 23-30.

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Joint performance of precast composite pavement and reflection crack suppression

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