【作者】 陈江；

【导师】 张洪亮；

【作者基本信息】 长安大学 ， 道路与铁道工程， 2010， 硕士

【摘要】 普通水泥混凝土路面是高等级公路路面的主要型式之一,在我国水泥路面具有明显的资源和造价优势。但随着交通运输发展,在重载交通和普通水泥混凝土路面自身缺陷的共同作用下,暴露出种种弊端。连续配筋混凝土路面(CRCP)具有整体性好、行车平顺舒适、耐久性强,使用寿命长、养护费用少、全寿命效益经济合理、裂缝处的传荷能力高等特点,适用于高等级公路以及重载公路,在欧美等发达国家的机场及干线公路得到了广泛应用。我国对CRCP做了一些研究工作,但其相关理论、方法和应用技术还不完善,特别是连续配筋混凝土施工技术方面研究非常滞后。尽管欧美等发达国家大面积修筑了CRCP,但是这些国家包括我国均未提出针对连续配筋混凝土(CRC)的配合比设计方法。本文通过CRCP敏感性分析并结合国内外CRCP的主要病害,确定影响CRCP路用性能的混凝土主要材料参数有,强度、干缩和温缩系数,因此连续配筋混凝土配合比设计不能仅以强度为控制指标。笔者通过国内外学者的研究成果分析得到影响CRC强度、干缩和温缩系数的主要配合比设计参数,根据相关室内试验系统性的研究这些参数对混凝土强度、干缩、温缩系数的影响。结合试验结果对水灰比与混凝土干缩、温缩系数的关系,抗弯拉强度与抗压强度的关系作了回归分析并得到了拟合的关系式。根据敏感性分析以及影响混凝土性能的主要配合比设计参数的相关成果,结合均衡设计的思想,在普通道路混凝土配合比设计方法的基础之上加以完善,建立适合于CRC的半经验半理论的设计方法。目前我国在CRCP施工技术方面如：集料选择、养生方法、裂缝主动控制等施工技术并未进行系统研究。本文结合国外相关研究成果,在烟威高速公路CRCP实体工程中对不同面层类型、不同钢筋布设方式、钢筋防锈措施、不同裂缝主动控制方法分别作了试验段,并对这些试验路段的进行了长期跟踪观测。主要观测内容有不同试验段内裂缝的数量、裂缝种类、裂缝宽度、冲断、传和系数、路面弯沉值等,根据跟踪观测结果,进行以上试验段进行对比分析,从而提出了适合我国国情的CRCP施工技术。更多还原

【Abstract】 Portland cement concrete pavement is one of the main type in China, cement road surface has obvious advantages of resources and cost. But with the development of transportation, in traffic and ordinary cement concrete pavement self-defects, exposed the shortcomings. Continuous reinforced concrete pavement (CRCP) has good entirety, smooth and comfortable, durability strong, long service life, less maintenance fee and life-cycle benefit economically reasonable and crack load transfer ability of higher characteristic, suitable for highway roads, in euramerican and overloading of developed countries, such as the airport and main highways were widely used. China did some research on CRCP work, but the related theory, method and application technology is not perfect, especially for reinforced concrete construction technology research is very backward. Although euramerican developed countries, such as the construction of large, but these countries include CRCP China failed to continuous reinforced concrete (CRC) proportioning design method.Based on sensitivity analysis and CRCP CRCP major disease, affect the performance of concrete CRCP main material parameters, strength, shrinkage and temperature shrinkage coefficient, therefore continuous reinforced concrete proportioning design not only with strength for the control indicators. Based on the analysis of domestic and foreign scholars research achievements influence CRC strength, shrinkage and temperature shrinkage of the main parameters of the coefficient of mix proportion design, according to relevant indoor test the systematic research of these parameters on the strength of concrete, shrinkage, temperature shrinkage effect coefficient. Combined with the experimental result water-cement ratio and concrete shrinkage, the relationship between temperature shrinkage coefficient, flexural strength and compressive strength of the relationship between the regression analysis and fitting relationship. Based on the sensitivity analysis and the main affecting concrete performance parameters of the mix proportion design, combined with the design ideas, balanced ordinary concrete road proportioning design method based on improved, suitable for half of the CRC experience design method of theory.At present, China in CRCP construction technology such as:aggregate selection, Regimen, crack active control, such as construction technology has not been done. Results of overseas research in this paper, the tobacco Wei highway project CRCP entity types for different surface, different way of laying steel, steel rust-proof measure, control, crack active test section were made, and the conduct of these trials sections long-term follow-up observations. The main contents of different experimental observation in paragraph number crack, crack type, crack width, thrust, mass and coefficient of Pavement Deflection and so on, according to tracking observations, for the above test section were analyzed, which made for China’s national conditions The CRCP construction technology.更多还原