Effectiveness of the steel mesh track in repairing asphalt pavements in Ma?opolska region

Resilient and Safe Road Infrastructure

土木建筑工程

Zieliski, P.^1

Cracow University of Technology, Poland^1

关键词: Deflection basin;    Design calculations;    Design solutions;    FWD deflections basin;    Parameters characterizing;    Reinforcement effects;    Significance analysis;    Steel meshes;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/356/1/012017/pdf
DOI  :  10.1088/1757-899X/356/1/012017

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The aim of this publication is to present and evaluate the effectiveness of the steel mesh track during reconstruction of the pavement on national roads in Malopolska. The paper presents the condition of the pavement before reconstruction, applied design solutions and the current state after 6-10 years of operation. To assess the effectiveness of pavement reinforcement, the results of central deflection tests using the FWD apparatus before and a few years after the reconstruction were compared, it was found that the reinforcement effect was achieved, what has been demonstrated by means of significance analysis of differences in Statgraphics program. Additionally the analyses were extended with parameters characterizing the FWD deflection basin. For selected parameters the values of tensile strains at the bottom of asphalt layers were determined on the basis of correlations given in literature and then the fatigue life was calculated using the criteria of the USA Asphalt Institute and compared with the results of design calculations. The pavement fatigue life estimated on the basis of FWD measurements is generally greater than the one calculated for the design solutions. The assessment of the influence of the steel mesh track on the bearing capacity of the pavement was carried out indirectly, by comparing the central deflections of the structures measured after the reconstruction, with theoretical deflections calculated using the pavement model in the BISAR program, without taking into account the presence of the steel mesh. In some cases the deflections measured are significantly smaller than the deflections calculated for the model without mesh, which can be explained by the reinforced effect of the steel mesh track, especially for sections with the lowest bearing capacity before reconstruction, and where the steel mesh track is placed in the tension zone of the asphalt layers.