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Effect of Stability of Reinforced Wall within Drain Layers in the Rainfall

강우시 보강토 내부 배수가 보강토 옹벽의 안정성에 미치는 영향

Chun-won Sin1
,
Chung-Sik Yoo2*
신 춘원1
,
유 충식2*
1Member, the master´s course, School of Civil and Environmental Engineering, Sungkyunkwan Univ.
2Member, Professor, School of Civil and Environmental Engineering, Sungkyunkwan Univ.
*교신저자. *Corresponding Author. 
30 June 2017. pp. 165-174
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Abstract

There are natural disasters caused by abnormal climate in the world. In particular, there are frequent disasters such as floods and landslides caused by rainfall in summer. Rainfall will have a major impact on the stability of a retaining wall. If drainage during rainfall activities within the retaining wall is not made properly, permeated water brings a significant increase in pore pressure inside of the backfill soil and reduces the shear strength of the soil. Therefore, research how to install the drainage layers to reduce the infiltrated water inside of the backfill soil is very necessary. In this study, we performed a numerical modeling to find the optimum installation conditions of the location and number of drainage layer related to stability of the reinforced retaining wall during rainfall installed geosynthetics.

Keywords
Reinforced wall
Drain layers
Geosynthetic

전 세계적으로 이상기후로 인한 자연재해가 이슈가 되고 있다. 특히 여름철 집중 강우로 인한 홍수 및 산사태와 같은 재해가 빈번하게 발생하고 있는데 강우는 옹벽의 안정성에도 큰 영향을 미치게된다. 만약 강우시 옹벽 내부의 배수활동이 제대로 이루어지지 않는다면 빗물이 뒷채움 흙 내부에 스며들어 옹벽 뒷면의 간극수압이 크게 증가하게되고 지반의 전단강도를 저하 시킨다. 따라서 옹벽 내부의 배수가 원활하게 이루어지도록 배수층을 설치하는 방법에 대한 연구가 매우 필요하다. 본 연구에 서는 토목섬유가 설치된 보강토 옹벽에서 배수층의 위치/갯수에 따른 강우시 보강토 옹벽의 안정성에 최적의 시공 조건을 찾는 수치해석 모델링을 수행하였다.

References
1
Bhattacherjee, D., Viswanadham. B.V.S. (2015), “Numerical studies on the performance of hybrid-geosynthetic-reinforced soil slopes subjected to rainfall”, Geosynthetics International Vol.22, Issue 6, pp.411-427.
2
Biot, M. A. (1955), “Theory of elasticity and consolidation for a porous anisotropic solid”, J. Appl. Pkys., Vol.26, No.2, pp.182-185.
3
Thou, J. N., Yang, K. H., and Huang, C. C. (2015), “Infiltration into unsaturated reinforced slopes with nonwoven geotextile drains sandwiched in sand layers”, Geosynthetics International Vol.22, Issue 6, pp.457-474.
4
Yoo, C. S. and Jung, H.Y. (2010), “Case History of Geosynthetic Reinforced Segmental Retaining Wall Failure”, Journal of Geotechnical and Geoenvironmental Engineering, Vol.136, Issue 3, pp.546-548.
5
Zienkiewicz, O.C. and Shiomi, T. (1984), “Dynamic behavior of saturated prous media: The generalized Biot formulation and its numerical solution”, Int. J. Numer. Analyt. Meth. Geomech., Vol.8, pp.71-96.
Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 16
  • No :2
  • Pages :165-174
  • Received Date : 2017-01-12
  • Revised Date : 2017-06-21
  • Accepted Date : 2017-06-22
  • DOI :https://doi.org/10.12814/jkgss.2017.16.2.165
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