International Journal of Highway Engineering (한국도로학회논문집)

Korean Society of Road Engineers (한국도로학회)
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A Method for Evaluation of Hollow Existence in Sublayers of Concrete Pavement Considering Pavement Stiffness

포장강성을 고려한 콘크리트 포장하부 공동유무 평가방법

  • 손덕수 (한국도로공사 도로교통연구원) ;
  • 이재훈 (한국도로공사 도로교통연구원) ;
  • 정호성 (인하대학교 토목공학과) ;
  • 박주영 (인하대학교 토목공학과) ;
  • 정진훈 (인하대학교 토목공학과)
  • Received : 2012.12.26
  • Accepted : 2013.01.29
  • Published : 2013.02.15
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Abstract

PURPOSES: The existing method evaluating the existence of the hollows in concrete pavement does not consider the stiffness of pavement. In addition, the method uses unreasonable logic judging the hollow existence by the deflection caused by zero loading. In this study, the deflection of slab corner due to heavy weight deflectometer (HWD) was measured in concrete pavement sections where underground structures are located causing the hollows around them. METHODS: The modulus of subgrade reaction obtained by comparing the actual deflection of slab to the result of finite element analysis was calibrated into the composite modulus of subgrade reaction. The radius of relative stiffness was calculated, and the relationship between the ratio of HWD load to the radius of relative stiffness and the slab deflection was expressed as the curve of secondary degree. RESULTS: The trends of the model coefficients showing width and maximum value of the curve of secondary degree were analyzed by categorizing the pavement sections into three groups : hollows exist, additional investigation is necessary, and hollows do not exist. CONCLUSIONS: The results analyzed by the method developed in this study was compared to the results analyzed by existing method. The model developed in this study will be verified by analyzing the data obtained in other sections with different pavement structure and materials.

Keywords

References

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