Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
권호 표지
DOI QR코드

DOI QR Code

Estimation Method of Infiltration Capacity for Assessment of Drainage Capacity II

배수성능 평가를 위한 침투능 산정기법에 관한 연구(II)

  • Jeong, Jisu (Department of Civil Engineering, Sang Ji University) ;
  • Shim, Jeonghoon (Department of Civil Engineering, Sang Ji University) ;
  • Lee, Dong Hyuk (Department of Civil Engineering, Sang Ji University) ;
  • Hwang, Youngcheol (Department of Civil Engineering, Sang Ji University) ;
  • Lee, Seungho (Department of Civil Engineering, Sang Ji University)
  • Received : 2020.10.29
  • Accepted : 2020.11.30
  • Published : 2020.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

As a result of a suite of laboratory tests undertaken to suggest a rational method for the estimation of infiltration capacity, it is found that the infiltration rate tends to increase as the soil unit weight decreases while it tends to increase as the rainfall intensity increases. Comparative analyses for infiltration curves employing the reduction constant of initial infiltration capacity (α coefficient) that was suggested in this study has reasonably captured the time dependent variation of infiltration capacity. Consequently this study has presented an experimental model for the estimation of infiltration capacity to improve the Horton infiltration capacity curve that has been widely used for estimation of the infiltration capacity and amount of infiltration for its application to sandy soils.

사질토지반에서 적용할 수 있는 합리적인 침투능 산정기법을 제시하기 위하여 실내실험결과를 분석한 결과, 단위중량이 감소함에 따라 침투속도는 증가하는 경향을 보였으며, 강우강도가 증가함에 따라 침투속도 또한 증가하는 것으로 나타났다. 또한 본 논문에서 제안한 초기침투능 감소상수(α계수)를 적용한 침투능 변화 곡선에 대하여 비교·분석한 결과 시간에 따른 침투능 변화가 거의 일치하는 것으로 나타났다. 본 연구에서는 침투능 및 침투량 산정 시 널리 사용되고 있는 Horton 경험식이 사질토지반에서는 적용이 어려운 점을 개선하여 침투능 산정 모형을 제안하였다.

Keywords

References

  1. Chenm, Li and Young, M. H. (2006), Green-Ampt infiltration model for sloping sufaces, Water Resources Research, Vol. 42, No. 7, pp. 1-9.
  2. Chu, S. T. (1978), Infiltration during an unsteady rain, Water Resource Research, Vol. 14, No. 3, pp. 461-466. https://doi.org/10.1029/WR014i003p00461
  3. Collins, B. D. and Znidarcic, D. (2004), "Stability analyses of rainfall induced landslides", Journal of Geotechnical and Geoenvironmental Engineering, ASCE, New-York, Vol. 130, No. 4. pp. 362-372. https://doi.org/10.1061/(ASCE)1090-0241(2004)130:4(362)
  4. Fourie, A. B. (1996), Predicting rainfall-induced slope instability, Proceedings of the Institutions of Civil Engineers, Geontechnical Engineering, Vol. 119, No. 4, pp. 211-218.
  5. Fredlund, D. G. and Rahardjo, H. (1993), Soil mechanics for unsaturated soils, John Wiley and Sons, Inc.
  6. Jeong, J. S., Shim, J. H., Hwang, Y. C. and Lee, S. H. (2019), Estimation method of infiltration capacity for assessment of drainage capacity I, Journal of the Korean Geo-Environmental Society, Vol. 20, No. 12, pp. 49-55.