一种路基动模量测试方法  

A method for testing dynamic mouduli of subgrade

作　　者：杨博[1] 张锐[1,2] 查旭东[1,2] 吕松涛[1,2] 

机构地区：[1]长沙理工大学交通运输工程学院,长沙410004 [2]长沙理工大学道路结构与材料交通行业重点实验室,长沙410004

出　　处：《岩土力学》2014年第5期1514-1519,共6页Rock and Soil Mechanics

基　　金：国家自然科学基金项目(No.51108049);国家自然科学基金项目(No.51078045);国家重点基础研究发展计划项目(No.2011CB411910);交通运输部科技项目(No.2011318824730);长沙理工大学道路结构与材料交通行业重点实验室开放基金资助项目(No.kfj110201)

摘　　要：为研究一种有效、合理的测定路基动模量的方法,在分析便携式地震波地质分析仪的工作原理和测试特点的基础上,根据弹性动力学和表面波谱分析理论,阐述了便携式地震波地质分析仪的测试原理,并推导了测试路基动模量计算公式。结合路基测试实际工作要求,提出了便携式地震波地质分析仪器的测试步骤及技术要点。通过在路基进行大量点点对应的便携式地震波地质分析仪、便携式落锤弯沉仪和承载板回弹模量测试以及动态圆锥贯入仪贯入测试和灌砂法压实度测试,建立了便携式地震波地质分析仪动模量与其他各指标之间的相关关系。结果表明,便携式地震波地质分析仪与其他检测方法具有很好的相关性,相关系数均大于0.8。结果表明,应用便携式地震波地质分析仪快速检测路基动模量是合理、可行的,可以用于路基施工过程的质量控制,为路面结构设计提供参数和依据。In order to study the efficient and reasonable dynamic moduli testing technology of subgrade, based on analysis of the portable seismic property analyzer（PSPA） for its working principle and testing characteristics, the testing principle of PSPA is described; and the calculation formula of dynamic moduli is deduced according to the elastodynamics and spectral analysis of surface wave theory （SASW）. Combined with the actual working conditions of subgrade field testing, the testing procedures and the main technical points of PSPA are put forward, and the distance between two detectors or detector with emission source of PSPA are both recommended according the different depths testing for subgrade. Combined with the project, a large number of on-site comparing tests on subgrade are made to obtain the dynamic moduli of PSPA, dynamic moduli of PFWD, resilient moduli of bearing plate, penetration ratios of dynamic cone penetrometer （DCP）; and compactnesses of sand cone method in order by point to point, the correlation between dynamic moduli of PSPA and other indexes are established. The results show that all the absolute values of correlation coefficient are more than 0.80 to indicate the good correlativity existing between the testing results with PSPA and other testing methods, it means that using PSPA for rapid testing dynamic moduli of subgrade is reasonable and feasible, it can apply to the quality control in construction procedure of subgrade and provide reliable parameters and basis for pavement design.

关 键 词：路基工程 动测技术 便携式地震波地质分析仪 动模量 贯入度 快速检测 

分 类 号：TU443[建筑科学—岩土工程]