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为了探讨水泥混凝土面层结构对路面振动响应的影响,对不同水泥混凝土面层的振动响应进行了试验研究。结果表明:面层厚度对路面基频影响显著,厚度每增加5 cm,基频降低约0.5 Hz;面层模量对路面基频影响较小,水泥混凝土等级从C15增加到C35,每提高C10,路面基频增加1.08%~2.2%。面层厚度和模量均能影响基频幅值,当面层厚度小于30 cm时,分别增加面层厚度和模量,基频幅值减小显著;当面层厚度超过30 cm,继续提高面层厚度和模量,基频幅值不再明显减小。板底分离形式的水泥混凝土路面结构和板底黏结形式的路面结构相比,基频相差微小,但幅值增大81%~95%。
In order to investigate the influence of cement concrete surfacing on the vibration response of pavement, the vibration response of different cement concrete surfacing was studied. The results show that the thickness of the surface layer has a significant effect on the fundamental frequency of the pavement. The fundamental frequency decreases about 0.5 Hz for every 5 cm of thickness increase. While the surface modulus has little effect on the pavement base frequency, the cement concrete grade increases from C15 to C35. , The road base frequency increased 1.08% ~ 2.2%. Both the thickness and modulus of the surface layer can affect the amplitude of the fundamental frequency. When the thickness of the surface layer is less than 30 cm, the thickness and modulus of the surface layer increase and the amplitude of the fundamental frequency decreases significantly. When the surface layer thickness exceeds 30 cm, Thickness and modulus, the fundamental frequency amplitude is no longer significantly reduced. Compared with the pavement structure of the bottom bonding form, the difference of the fundamental frequency of the cement concrete pavement structure with bottom separation is slight, but the amplitude increases by 81% -95%.