路基路面检测技术与质量控制

【作者】 李强；

【导师】 王选仓；

【作者基本信息】 长安大学 ， 道路与铁道工程， 2002， 硕士

【摘要】 针对国内检测相对落后的状况，本文以河南洛三高速公路为依托，全面调查了路基路面的施工参数，结合试验段进行施工质量的变异性分析。通过对路基现场检测不同方法的对比分析，建立了设计动模量、贝克曼梁静弯沉、现场CBR、稠度和压实度与现场承载板模量的关系；通过室内试验，分析了稠度对室内承载板、室内CBR的影响，并建立了室内外模量间的关系；在此基础上，结合工程实际，对不同检测方法进行了评价，提出了较为合理的路基施工质量检测标准。通过典型半刚性基层材料的室内外试验，研究主要设计参数的室内试验值、野外养生值、现场取芯值及施工指标间的关系，建立了不同试验方法间的相关关系，运用时温换算法则，对现场芯样进行强度评定，并提出了路表弯沉检测标准的确定方法。 本文还分析了路面现行检测方法存在的问题，通过现场不同方法的对比检测，建立了激光平整度测试车、探地雷达测试系统、摩擦系数测试车和落锤式弯沉仪(FWD)等新型检测方法和规范测试方法间的相关关系，从而提出新型检测的质量控制标准。通过对丰富的FWD检测数据的分析，提出了全新的路面结构强度评定标准；借助EVERCALC反算程序，介绍了模量反算的一般规律，分析了仪器测量误差和输入参数对反算结果的影响，利用弯沉盆的几何特性对路面的整体强度进行评价，并建立了各结构层动模量与静模量间的相关关系。更多还原

【Abstract】 Aiming at the relatively lagging test situation in China, in this paper it carries a full-scale research on the sub-grade and pavement construction parameters based on the Luo-San highway in He-Nan, and it analyses the variabilities of them. After contrasting and analyzing the main design parameters’ test methods of laboratory and field outside, it sets up the correlativities between the field bearing plate modulus and other parameters such as design dynamic modulus, Benkleman bean static deflection, field CBR value, consistency and density. By means of laboratory experiment, it assays the influence of the consistency on laboratory bearing plate modulus and laboratory CBR values, and establishes the relationships between laboratory and field values. Combined with the project, a more logical sub-grade quality test standard is put forward.By means of laboratory and field experimentation of typical semi-rigid base materials, the relationships among laboratory experimental values, field maintain values , field core values and construction criteria are put forward. And the relationships between different test methods are established. Using time-temperature conversion principle, it processes the intensity assessment of field cores, then offers the method of determining the test deflection of pavement surface.In this paper, it also analyses the disadvantages of methods in present pavement specification. By means of parallel field test experimentation, and gives the correlativities between test methods of specification and new pattern test methods, such as Road Surface Profiler, Ground Penetrate Rada test system, friction test vehicle, Falling Weight Deflectometer. Based on these correlativities, their test and quality control standards are formed. Imposing on the abundant FWD test data, a newly pavement intensity assessment standard is come into being. Recurring to the program EVERCALC5.0, the common rules of backcalculation modulus are introduced, moreover, the influence of instrument measurement error and input parameters are construed. Utilizing the characteristics of deflection basin, so that it can assess the intensity of whole pavement structure. At last, the correlativities of dynamic and static modulus are established at each structure layer.更多还原