A case Study on Application of Granular Compaction Pile in Fly Ash Landfill Area

Jun-Eui Lee; Seung-Joo Lee; Jong-Chul Hong; Jong-Young Lee; Jung-Geun Han

doi:10.12814/jkgss.2019.18.3.001

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2019 Vol.18, Issue 3 Next Page

Research Article

A case Study on Application of Granular Compaction Pile in Fly Ash Landfill Area Fly ash로 매립된 지역에서 쇄석다짐말뚝 적용에 관한 사례연구

30 September 2019. pp. 1-9

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Abstract

본 연구에서는 Fly ash로 매립된 지반에서 쇄석다짐말뚝을 적용하여 지반개량 효과를 확인하고자 하였다. 지반조사 및 콘 관입시험을 통해 Fly ash 매립층의 심도, 강도정수를 산정한 후 STONE C 프로그램을 이용해 개량된 지반의 강도정수 및 이론식을 이용해 대상지반의 지지력과 침하량을 예측하였다. 현장에서 실시한 평판재하시험 결과 쇄석다짐말뚝으로 시공된 Fly ash 지반의 지지력은 설계하중을 상회하였으며, 침하량은 모두 기준치 이내로 만족하였다. 시공 후 콘관입시험에 의한 개량효과를 확인한 결과 GCP시공에 따른 복합지반 형성 및 주변지반의 밀도증가에 따라 콘 관입저항치(q_c)는 250%∼500%가량 증가된 것으로 나타나 Fly ash매립지에서 쇄석다짐말뚝의 지반개량효과가 우수함을 확인할 수 있었다.

In this study, the effect of ground improvement was to be verified by granular compaction pile from the ground reclaimed with Fly Ash landfill site. The depth and strength parameters of the Fly ash layer was determined using the ground investigation and cone penetration test. And the STONE C program was used to predict the strength parameter, bearing capacity and settlement of the improved ground. As a result of the plate bearing test, the bearing capacity of improvement ground was higher than the design load and the settlement was smaller than the reference value. After the construction, the improvement effect by the cone penetration test was confirmed. The cone penetration resistance value(q_c) increased by 250% to 500% and the effect was excellent.

Keywords

Granular compaction pile

Fly ash landfill

Bearing capacity

Ground settlement

Improvement

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Information

Publisher :Korean Geosythetics Society
Publisher(Ko) :한국지반신소재학회
Journal Title :Journal of the Korean Geosynthetics Society
Journal Title(Ko) :한국지반신소재학회 논문집
Volume : 18
No :3
Pages :1-9
Received Date : 2019-06-18
Revised Date : 2019-06-24
Accepted Date : 2019-06-25
DOI :https://doi.org/10.12814/jkgss.2019.18.3.001

Journal of the Korean Geosynthetics Society ISSN:2508-2876(Print) 2287-9528(Online) 한국지반신소재학회 논문집

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