Moharekpour Milad, Liu Pengfei, Oeser Markus
Institute of Highway Engineering, RWTH Aachen University, Mies-van-der-Rohe-Str. 1, 52074 Aachen, Germany.
Federal Highway Research Institute (BASt), Brüderstr. 53, 51427 Bergisch Gladbach, Germany.
Materials (Basel). 2022 Dec 30;16(1):358. doi: 10.3390/ma16010358.
Continuously reinforced concrete pavement (CRCP) is a representative type of concrete pavement constructed with continuous steel bars without intermediate transverse expansions. With reference to pavement conditions, CRCP is an exceptional type of concrete pavement according to the Highway Pavement Condition Index (HPCI) and International Roughness Index (IRI). The two main design methods for CRCP are AASHTO 86/93 and the Mechanistic-Empirical Pavement Design Guide (MEPDG). Because of limitations of the AASHTO 86/93 design method, the MEPDG method is more reliable. While incorporating the interactions among geometrics, pavement structure layers, material properties, subgrade, traffic, and environmental conditions, and the prediction values according to the MEPDG method, it matched the measured results of crack spacing and crack width. The MEPDG punchout, crack width and spacing, and load transfer efficiency (LTE) models were evaluated, and results were compared with the test sections in three European countries consisting of different construction details, which were investigated and recorded between 2019 and 2021. In this sense, a calculation tool was developed to consider the influence of different parameters in design process. In addition, sensitivity analyses were executed for the development of punchout, considering various input parameters. The track surveying and the evaluation of the results indicated that the design process can be improved with consideration of some criteria such as crack formation time or adjustment of the correlation between crack width and crack spacing. Due to the very important function of erosion and resulting pumping in the deterioration of CRCP, it is advisable to include the influence of the base layer and the influence of different shoulder type and heavy traffic volume or effect of deflection in the calculations.
连续配筋混凝土路面（CRCP）是一种典型的混凝土路面，其采用连续钢筋建造，无中间横向伸缩缝。参照路面状况，根据公路路面状况指数（HPCI）和国际平整度指数（IRI），CRCP是一种特殊类型的混凝土路面。CRCP的两种主要设计方法是AASHTO 86/93和力学经验路面设计指南（MEPDG）。由于AASHTO 86/93设计方法存在局限性，MEPDG方法更可靠。在考虑几何形状、路面结构层、材料特性、路基、交通和环境条件之间的相互作用以及根据MEPDG方法得出的预测值时，它与裂缝间距和裂缝宽度的实测结果相匹配。对MEPDG冲切、裂缝宽度和间距以及荷载传递效率（LTE）模型进行了评估，并将结果与2019年至2021年期间调查记录的三个欧洲国家不同施工细节的试验路段进行了比较。从这个意义上说，开发了一种计算工具来考虑设计过程中不同参数的影响。此外，针对冲切的发展进行了敏感性分析，考虑了各种输入参数。轨道测量和结果评估表明，考虑裂缝形成时间或调整裂缝宽度与裂缝间距之间的相关性等一些标准，可以改进设计过程。由于侵蚀及其导致的唧泥在CRCP劣化过程中起着非常重要的作用，因此在计算中考虑基层的影响、不同路肩类型和重交通量的影响或挠度的影响是明智的。
