A modification method of temperature-induced curling impact based on pavement deflection is proposed in order to reduce the impact of temperature-induced curling on deflection test of airport cement concrete pavement and im-prove the accuracy of structural performance evaluation of pavement.Firstly,the effective deflection of the pave-ment under negative temperature gradient is derived as the difference between the field-measured deflection and the corresponding temperature-induced curling.Secondly,based on numerical simulation and regression calcula-tion,it is analyzed that the temperature-induced curling at the edge as well as corner of the pavement panel are lin-early positively correlated with the thickness of the pavement panel and the flexural and tensile elastic modulus of the cement concrete,and are only slightly influenced by the low-level subgrade reaction modulus and joint load transfer capacity.Accordingly,a calculation formula for pavement temperature-induced curling is established with the thickness of the pavement panel and the flexural and tensile elastic modulus of the cement concrete as correc-tion parameters.Finally,the modification method proposed in this article is verified through field testing.The re-sults show that the correction error of deflection is less than 10.0%at edge and less than 6.0%at corner of the pave-ment panel based on the standard of pavement deflection under zero temperature gradient.The proposed modifica-tion method of temperature-induced curling impact based on pavement deflection can satisfy the requirement for general structural performance evaluation of airport pavement.
维普
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