同济大学学报（自然科学版）2025，Vol.53Issue(5)：732-740,9.DOI:10.11908/j.issn.0253-374x.23345
基于三维探地雷达和落锤式弯沉仪的旧水泥混凝土路面疲劳性能评估
Evaluation of Fatigue Performance of Old Cement Concrete Pavement Based on Three-Dimensional Ground Penetrating Radar and Falling Weight Deflectometer
摘要
Abstract
To improve the accuracy of fatigue performance evaluation for old cement concrete pavement,a comprehensive approach was adopted.First,considering the significant correlation between the key technical parameters such as the thickness and modulus of the old cement panel,and the fatigue performance,three-dimensional ground-penetrating radar(3D-GPR)and a falling weight deflectometer(FWD)were used.These tools enabled the precise acquisition of structural parameters such as the thickness of cement concrete layer(hc),the modulus of cement concrete layer(Ec),and the modulus of base layer(Et),which enhanced the reliability of the evaluation method by improving the accuracy of structural parameters.Then,the relationship between the strength condition and damage status of each structural layer was evaluated,and a fatigue performance evaluation model for old cement concrete pavement was established.Finally,the effects of variations in hc,Ec,and Et on the fatigue performance of pavements and the internal fatigue stress of the cement concrete layers were analyzed.The results indicate that the strength of the surface layer and the base layer are closely related when the stress concentration of the old cement panel is caused by a decrease in the joint load transfer coefficient,and the two affect each other.When both hc and Ec,Et decrease by 1%,the decrease in fatigue life(Ne)caused by hc is close to three times that caused by Ec and Et.hc is the most critical parameter affecting the fatigue performance of the cement pavement,and the reduction of Et and Ec only slightly changes both load-induced and temperature-induced fatigue stress inside the cement pavement.关键词
水泥混凝土路面/三维探地雷达/落锤式弯沉仪/疲劳应力/影响分析Key words
cement concrete pavement/falling weight deflectometer(FWD)/three-dimensional ground penetrating radar(3D-GPR)/fatigue stress/influence analysis分类
交通运输引用本文复制引用
赵为天,杨群..基于三维探地雷达和落锤式弯沉仪的旧水泥混凝土路面疲劳性能评估[J].同济大学学报（自然科学版）,2025,53(5):732-740,9.基金项目
国家自然科学基金(51778482) （51778482）
