Dynamic Relative Displacement of Geosynthetic-Soil Interface Considering Chemical Effect

Chang-Won Kwak; Myoung-Hak Oh; Dong-In Jang; Inn-Joon Park

doi:10.7843/kgs.2016.32.11.73

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2016 Vol.32, Issue 11 Preview Page Next Page

Dynamic Relative Displacement of Geosynthetic-Soil Interface Considering Chemical Effect 화학적 영향을 고려한 토목섬유-지반 접촉면의 동적상대변위

30 November 2016. pp. 73-81

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Abstract

Recently, the construction of onshore waste landfill sites has been studied due to the increase of waste and geosynthetics are widely utilized to enforce and protect waste landfill. Geosynthetics comprises the interface with soil and the seismic behavior and stability mostly depend on the dynamic shear behavior of the geosynthetic-soil interface. Therefore, the understanding of dynamic shear behavior and dynamic relative displacement of the interface is critical. The dynamic shear behavior of the interface is affected by surrounding conditions and loading and shows very complicated response, and, it is difficult to study theoretically. In this study, laboratory test to investigate dynamic relative displacement is performed under chemical condition. Dynamic interface apparatus is utilized and cyclic simple shear tests are conducted under short term (60 days of submerging period) and long term (840 days of submerging period) conditions. Consequently, relative displacement of the interface shows the largest values under acid condition, which means more severe damage of the interface.

Keywords

Onshore waste landfill

Geosynthetic-soil interface

Dynamic shear behavior

Dynamic relative displacement

최근 늘어나고 있는 폐기물량에 따라 해상 폐기물 매립장의 건설이 연구되고 있으며, 매립장 내 폐기물의 보강 및 보호 목적으로 토목섬유가 널리 사용되고 있다. 토목섬유는 흙과의 접촉면을 형성하는데 지진시 접촉면에서의 동적 전단 거동이 폐기물 매립장의 지진시 거동 및 안정성을 지배하는 가장 중요한 요소이다. 따라서 접촉면 동적 전단거동 및 동적상대변위 파악이 매우 중요하다. 이러한 접촉면 거동은 주위 환경 및 하중조건에 의해 영향을 받으며 복잡한 응답을 보이므로 이론적 접근이 곤란하다. 본 연구에서는 침출수 내의 산성 및 염기성과 같은 성분이 반복 전단하중 상태에서 지반-토목섬유 접촉면의 동적 상대변위특성에 대하여 실내 시험을 수행하고 그 결과를 분석하였다. 이를 위하여 동적 접촉면 전단 시험기를 이용하여 산성 및 염기성 용액에 840일 장기수침 시료와 60일 단기수침시료에 대하여 반복 단순전단 시험을 수행 하였다. 그 결과 산성 및 염기성 조건 공통적으로 산성일 경우 접촉면의 상대변위가 가장 큰 값을 나타내어 접촉면 손상 정도의 크기가 상대적으로 큰 것으로 나타났다.

References

1.Kwon, O.S., Oh, M.H., and Chae, K.S. (2012), “Manual for Design, Construction, Management of Managed Waste Landfill”, CIR, pp. 2-3.

2.Park, I.J., Kwak, C.W., Park, J.B., and Cho, J.S. (2012), “A Study on the Shear Behaviors of Geosynthetic-soil Interface in the Waste Landfill Site”, Journal of Korean Geotechnical Society, Vol.28, No.3, pp.45-54.

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6.Kwak, C.W., Park, I.J., and Park, J.B. (2016), “Development of Modified Interface Apparatus and Prototype Cyclic Simple Shear Test Considering Chemical and Thermal Effects”, ASTM Geotechnical Testing Journal, Vol.39, No.1, pp.20-34.

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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 : 32
No :11
Pages :73-81
Received Date : 2016-09-12
Revised Date : 2016-09-27
Accepted Date : 2016-09-30
DOI :https://doi.org/10.7843/kgs.2016.32.11.73

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

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