Dynamic Shear Behavior of the Ground-geosynthetics Interface in the Waste Landfill

Dong-In Jang; Young-Jun Kim; Chang-Won Kwak; Inn-Joon Park

doi:10.7843/kgs.2015.31.4.5

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2015 Vol.31, Issue 4 Next Page

Dynamic Shear Behavior of the Ground-geosynthetics Interface in the Waste Landfill 폐기물 매립장 지반-토목섬유 접촉면의 동적 전단거동 특성

30 April 2015. pp. 5-12

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Abstract

The construction of waste landfill sites has been increased due to recent expansion of various waste. Geotextiles are widely used for the purpose of reinforcement and protection of waste inside the landfill. Geotextile affects the shear behavior of waste landfill which forms the contact surface with soil. In this study, the effect of acidic and alkaline components in leachate has been analyzed through the laboratory experiment on the shear stress reduction of the contact surface of ground-geotextile under the cyclic load. For this purpose, a dynamic contact surface shear tester has been manufactured, and cyclic simple shear tests have been performed using geotextile and soil specimen which were immersed in chemical solutions for 60 and 840 days, respectively. Based on the Disturbed State Concept, the characteristics of shear stress on the contact surface of ground-geotextile due to chemical factors have been identified by the disturbance function.

Keywords

Chemical factors

Cyclic simple shear tests

Soil-geosynthetic interface

Dynamic shear behavior

Waste landfill

최근 늘어나고 있는 폐기물량에 따라 폐기물 매립장의 건설이 증가하고 있으며, 매립장 내 폐기물의 보강 및 보호 목적으로 토목섬유가 널리 사용되고 있다. 토목섬유는 흙과의 접촉면을 형성하는데 폐기물 매립장의 전단 거동에 영향을 미치게 된다. 본 연구에서는 침출수 내의 산성 및 염기성과 같은 성분이 반복 전단하중 상태에서 지반-토목섬유 접촉면의 전단강도 감소에 미치는 영향을 실내 시험을 통하여 분석하였다. 이를 위하여 동적 접촉면 전단시험기를 제작하고 60일, 840일간 수침시킨 토목섬유와 흙 시료를 이용하여 반복 단순전단시험을 수행하였고, 그 결과를 교란상태개념에 기초하여 화학적 인자들에 의한 지반-토목섬유 접촉면의 전단강도 감소 특성을 교란도 함수로써 확인하였다.

References

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2.Christensen, T.H., Kjeldsen, P., Albrechtsen, H.J., Heron, G., Noelsen, P.H., Bjerg, P.L., and Holm, P.E. (1994), Attenuation of Landfill Leachate Pollutants in Aquifers, Crit, Rev. Environ. Sci. Technol., Vol.24, pp.119-202.

3.Kwak, C.W., Park, I.J., and Park, J.B. (2013a), “Modified Cyclic Shear Test for Evaluating Disturbed Function and Numerical Formulation of Geosynthetic-Soil Interface Considering Chemical Effect”, Geotechnical Testing Journal, Vol.36, No.4, pp.553-567.

4.Kwak, C.W., Park, I.J., and Park, J.B. (2013b), “Evaluation of Disturbance Function for Geosynthetic-soil Interface Considering Chemical Reactions Based on Cyclic Direct Shear Tests”, Soils and Foundations, Vol.53, No.5, pp.720-734.

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Information

Publisher :The Korean Geotechnical Society
Publisher(Ko) :한국지반공학회
Journal Title :Journal of the Korean Geotechnical Society
Journal Title(Ko) :한국지반공학회 논문집
Volume : 31
No :4
Pages :5-12
Received Date : 2014-07-02
Revised Date : 2015-03-03
Accepted Date : 2015-04-01
DOI :https://doi.org/10.7843/kgs.2015.31.4.5

Journal of the Korean Geotechnical Society ISSN:1229-2427(Print) 2288-646X(Online) 한국지반공학회 논문집

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