基于动态反演方法的半刚性基层结构层模量季节变化规律研究
|
摘要
采用落锤式弯沉仪(FWD)对不同季节半刚性基层路面结构进行弯沉检测,并对弯沉时程曲线进行动态反演,得到沥青层动态模量主曲线和其他结构层模量,分析不同季节动态模量结果得知,沥青层作为黏弹性材料力学性能随季节变化较大,基层、底基层模量随季节变化规律不强,土基受湿度等条件的影响,模量季节性变化较强,最大差别为49.5%。
This paper adopted falling weight deflector to do deflection inspection on semi-rigid base pavement structure of different seasons, and conducted dynamic inverse on deflection time history curves, which obtained dynamic modulus master curve of asphalt layer and modulus of other structural layers. Through analyzing the results of dynamic modulus of different seasons, it is found that as viscoelastic material, the mechanical properties of asphalt layer had big change with seasonal changes, while the modulus of base and subbase had small change with seasonal changes, and the modulus of soil matrix had big change with seasonal changes due to humidity and other factors with largest difference of 49.5%.
This paper adopted falling weight deflector to do deflection inspection on semi-rigid base pavement structure of different seasons, and conducted dynamic inverse on deflection time history curves, which obtained dynamic modulus master curve of asphalt layer and modulus of other structural layers. Through analyzing the results of dynamic modulus of different seasons, it is found that as viscoelastic material, the mechanical properties of asphalt layer had big change with seasonal changes, while the modulus of base and subbase had small change with seasonal changes, and the modulus of soil matrix had big change with seasonal changes due to humidity and other factors with largest difference of 49.5%.
引文
[1]查旭东.路面结构层模量反算方法综述[J].交通运输工程学报,2002,2(4):1-6.
[2]Al-Qadi,I.L,and Wang,H.Full-depth pavement responses under various tire configurations:accelerated pavement testing and finite element modeling[J].Journal of Association of Asphalt Paving Technologists,2009,78,721-760.
[3]Bush,A.J.,Alexander,D.R.Pavement evaluation using deflection basin measurements and layered theory[J].Transportation Research Record,1985,1022:16-29.
[4]Cooley,J.W.,Turkey,J.W.An algorithm for the machine calculation of complex Fourier series[J].Mathematics of Computation,1965,19(90):297-301.
[5]曹丹丹,赵延庆,田泽峰,等.沥青路面动态黏弹反演研究[J].土木工程学报,2017,50(9):104-109.
[2]Al-Qadi,I.L,and Wang,H.Full-depth pavement responses under various tire configurations:accelerated pavement testing and finite element modeling[J].Journal of Association of Asphalt Paving Technologists,2009,78,721-760.
[3]Bush,A.J.,Alexander,D.R.Pavement evaluation using deflection basin measurements and layered theory[J].Transportation Research Record,1985,1022:16-29.
[4]Cooley,J.W.,Turkey,J.W.An algorithm for the machine calculation of complex Fourier series[J].Mathematics of Computation,1965,19(90):297-301.
[5]曹丹丹,赵延庆,田泽峰,等.沥青路面动态黏弹反演研究[J].土木工程学报,2017,50(9):104-109.