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Research Article

Numerical Analysis of Displacement Reduction Effects of High-Strength Geogrid-Reinforced Gravel Compaction Piles

수치해석을 이용한 고강도 지오그리드 보강 쇄석다짐말뚝의 변위 저감 효과 분석

Kyungho Park1
,
Hyeok Seo2*
박 경호1
,
서 혁2*
1Assistant Professor, Department of Civil Construction Engineering, Chosun College of Science and Technology
2Assistant Professor, Department of Civil & Environmental Engineering, Honam University
1조선이공대학교 토목건설과 조교수
2호남대학교 토목환경공학과 조교수
*Corresponding Author
31 March 2026. pp. 145-155
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Abstract

This study numerically analyzed the behavior of soft ground reinforced with Gravel Compaction Piles (GCP) and Geogrid Reinforced Gravel Compaction Piles (GRGCP). Finite element models were developed for sandy (SP) and silty clay (ML) soils under single and group pile conditions to evaluate vertical settlement, lateral displacement, and stress distribution. The results show that high-strength geogrid confinement effectively suppresses lateral bulging and enhances composite ground stiffness, with more pronounced improvement in group pile configurations. The numerical outcomes agree well with trends observed in previous experimental studies, confirming the effectiveness of GRGCP in soft ground improvement. This study provides essential baseline information for determining reinforcement stiffness and layout parameters in GRGCP design.

Keywords
gravel compaction pile
geogrid
soft ground
numerical analysis
deformation characteristics

본 연구에서는 쇄석다짐말뚝(GCP) 및 지오그리드 보강 쇄석다짐말뚝(GRGCP)이 적용된 연약지반의 거동을 수치해석을 통해 분석하였다. 단말뚝 및 군말뚝 조건을 고려하여 사질토(SP)와 실트질 점토(ML)에 대한 유한요소해석 모델을 구축하고, 주요 평가 항목으로 수직침하, 수평변위, 응력분담 특성을 검토하였다. 해석 결과, 고강도 지오그리드의 구속효과는 말뚝 주변 측방 팽창을 억제하고 복합지반의 강성을 증가시키는 것으로 나타났으며, 특히 군말뚝 조건에서 지지력 증대와 변위 저감 효과가 두드러졌다. 이러한 결과는 기존 실험연구의 경향과도 일치하여 GRGCP가 연약지반 개선에 효과적인 보강 기법임을 확인하였다. 본 연구는 GRGCP 설계 시 보강 강성 및 배치 인자 결정에 활용할 수 있는 기초자료를 제공한다.

키워드
쇄석다짐말뚝
지오그리드
연약지반
수치해석
변형특성
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Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 36
  • No :1
  • Pages :145-155
  • Received Date : 2026-02-19
  • Revised Date : 2026-03-25
  • Accepted Date : 2026-03-26
  • DOI :https://doi.org/10.9720/kseg.2026.1.145
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