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 I

배수성능 평가를 위한 침투능 산정기법에 관한 연구 I

  • Received : 2019.11.05
  • Accepted : 2019.11.25
  • Published : 2019.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

Slope failure analysis entails proper understanding of various factors as well as the characteristics of ground conditions, which are difficult to achieve due to technological limits. Despite a number of past studies to clarify possible factors triggering slope failures, the impact of rainfall characteristics and infiltration rate, which are the key to estimation of slope stability in wet condition, on slope failures still remains unclear. This study has estimated permeability against various unit weights of soil based on constant head permeability tests using Jumunjin standard silica sand. One dimensional infiltration tests were conducted to estimate the infiltration capacity and the amount of infiltration taking into account the permeability and rainfall intensity. The applicability of existing empirical equations for the estimation of infiltration to granular soils was verified on the basis of the test results.

사면 붕괴에 대한 해석은 지반특성과 여러 가지 복합적인 인자들로 인해 정확한 해석은 어려운 것이 사실이다. 지속적으로 발생하는 사면재해로 인하여 사면재해 발생 원인을 규명하기 위한 많은 연구가 이루어지고 있지만, 사면 붕괴의 가장 중요한 요소인 강우특성 및 강우로 인한 침투능에 따른 사면 안정성 평가는 미흡한 실정이다. 본 연구에서는 주문진표준사를 이용하여 단위중량별 정수위 투수시험을 통한 투수계수를 산정하였으며, 투수계수와 강우강도의 영향을 고려하여 침투능 및 침투량을 산정할 수 있는 강우강도별 일차원 침투실험을 실시하였다. 실험결과를 바탕으로 사질토지반에서의 기존 경험식의 적용성을 분석하였다.

Keywords

References

  1. 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
  2. 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)
  3. Fredlund, D. G. and Rahardjo, H. (1993), Soil Mechanics for Unsaturated Soils, John Wiley and Sons, Inc.
  4. Fredlund, D. G., Xing, A. and Huang, D. (1994), Predicting of permeability function for unsaturated soils using the soilwater characteristic curve, Can. Geotech. J., Vol. 31, pp. 533-546. https://doi.org/10.1139/t94-062
  5. Leong, E. C. and Rahardjo, H. (1997), Review of soil-water characteristic curve equations, Journal of Geotechnical and Geoenvironmental Engineering, ASCE, Vol. 123, No. 12, pp. 1106-1117. https://doi.org/10.1061/(ASCE)1090-0241(1997)123:12(1106)