【摘要】 为了研究一种刚柔复合式路面动测方法的有效性与合理性,在掌握便携式地震波地质分析仪工作原理和测试特点的基础上,假定刚柔复合式路面为双层均匀弹性介质结构,运用瞬态面波频谱分析法研究了Rayleigh面波在此结构中的频散特性,推导了便携式地震波地质分析仪测试刚柔复合式路面动模量与结构厚度的反演方法。通过在典型刚柔复合式路面路表点对点依次采用便携式地震波地质分析仪和落锤弯沉仪法(FWD)测试动模量,承载板测试回弹模量和钻芯测试沥青混凝土(AC)层厚度,建立了各测试指标之间的相关关系。研究结果表明:便携式地震波地质分析仪反演的动模量比静回弹模量高出48.0%~73.4%,且与FWD反演结果具有较好的一致性,同时结构厚度反演结果均在实际厚度80%的置信区间内,所有判定系数均大于0.8,表明应用便携式地震波地质分析仪快速评价刚柔复合式路面动参数是合理、可行的。更多还原

【Abstract】 In order to investigate the validity and rationality of dynamic testing method for rigidflexible composite pavement,based on the working principle and testing characteristics of portable seismic property analyzer(PSPA),the rigid-flexible composite pavement was assumed to be double uniform elastic medium structure in which the frequency dispersion properties of Rayleigh surface wave were also analyzed by using spectral analysis of surface wave(SASW),and the inversion method for testing dynamic modulus and structure thickness of the rigid-flexible pavement using PSPA was deduced.The point-to-point on-site comparative tests on typical rigidflexible pavement were made to obtain the dynamic modulus by using PSPA and FWD respectively,static resilient modulus by using bearing plate test and the thickness of asphalt concrete(AC)layer by drill core in turn,and the correlations between each measurement index werealso established.The results show that the dynamic modulus inversed by PSPA is 48.0% to 73.4%higher than the static resilient modulus,which has good consistency with that inversed by FWD.Moreover,the thicknesses of AC layer inversed by PSPA are all in 80%confidence interval of the actual thicknesses,and all determination coefficients are more than 0.8,which means that PSPA is a reasonable and feasible method to rapidly evaluate dynamic parameters of the rigid-flexible composite pavement.更多还原