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Research Article

A Numerical Analysis on Stability Analysis of Cavity Ground considering Pavement Thickness and Traffic Load

포장층 두께와 교통하중 크기를 고려한 공동 발생 지반의 안정성 분석에 관한 수치해석

Seung-Kyong You1
,
Heechul Ahn2*
,
Young-Ho Kim3
,
Jung-Geun Han4
,
Gigwon Hong5
,
Jeong-Jun Park6
유 승경1
,
안 희철2*
,
김 영호3
,
한 중근4
,
홍 기권5
,
박 정준6
1Member, Professor, Dept. of Civil Engineering, Myongji College, 134 Gajwa-ro, Seodaemun-gu, Seoul 03656, Republic of Korea
2Student member, Graduate Student, School of Civil and Environmental Engineering, Chung-Ang Univ., 84 Heukseok-Ro, Dongjak-gu, Seoul 06974, Republic of Korea
3Student member, Graduate Student, School of Civil and Environmental Engineering, Chung-Ang Univ., 84 Heukseok-Ro, Dongjak-gu, Seoul 06974, Republic of Korea
4Member, Professor, School of Civil and Environmental Engineering, Urban Design and Study, Chung-Ang Univ., 84 Heukseok-Ro, Dongjak-gu, Seoul 06974, Republic of Korea
5Member, Director, Institute of Technology Research and Development, Korea Engineering & Construction, 3-16 Jungdae-ro 25-gil, Songpa-gu, Seoul 05661, Republic of Korea
6Member, Principal Researcher, Incheon Disaster Prevention Research Center, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Republic of Korea
* Corresponding Author
30 December 2019. pp. 287-297
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Abstract

본 연구에서는 공동 발생 지반에 대한 안정성 분석을 목적으로 포장층 두께와 교통하중 크기를 고려한 일련의 유한요소 수치해석을 수행하였다. 본 수치해석 방법의 타당성 검증을 위해 선행된 수치해석 연구를 활용하여 공동 발생 지반의 역학적 거동을 모사하였으며, 기존의 현장계측 결과와 비교·분석하였다. 또한, 수치해석 결과로부터 지반의 간극비, 지표침하, 전단응력의 변화를 확인함으로써 전반적인 지반의 역학 거동을 확인할 수 있었으며, 본 연구에서 산정한 응력비 및 비파괴심도와 지표침하량의 관계를 이용하여 공동 발생 지반의 안전성을 분석하였다. 그 결과, 포장층 두께가 감소하고 교통하중 크기가 증가할수록 지표침하량의 증가와 함께 비파괴심도 및 지반의 전반적인 안정성은 감소함을 알 수 있었다.

In this study, a series of finite element numerical analyzes were performed considering the pavement thickness and traffic load for the purpose of stability analysis on the cavity ground. In order to verify the validity of this numerical method, the previous numerical analysis was used to simulate the mechanical behavior of cavity ground, and the results were compared and analyzed. Also, from the numerical results, it was possible to confirm the dynamic behavior of the ground by confirming the change of ground void ratio, surface settlement, and shear stress, and using the relationship between stress ratio, non-destructive depth and surface settlement, the safety of the was analyzed. As a result, as the pavement thickness decreased and the traffic load increased, the non-destructive depth and the overall stability of the ground decreased with the increase of surface settlement.

Keywords
Cavity
AC pavement
Traffic load
Factor of safety
Finite element analysis

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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 :4
  • Pages :287-297
  • Received Date : 2019-12-04
  • Revised Date : 2019-12-22
  • Accepted Date : 2019-12-24
  • DOI :https://doi.org/10.12814/jkgss.2019.18.4.287
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