All Issue

2018 Vol.17, Issue 1 Preview Page
Analysis of Influencing Factors on Cavity Collapse and Evaluation of the Existing Cavity Management System

공동 붕괴를 유발하는 영향인자 분석 및 기존 공동관리 시스템 평가

Kicheol Lee1
,
Jongho Park2
,
Byeong-Hyun Choi3
,
Dongwook Kim4*
이 기철1
,
박 종호2
,
최 병현3
,
김 동욱4*
1Graduate Student, Dept of Civil and Environmental Engineering, Incheon National University
2Undergraduate Student, Dept of Civil and Environmental Engineering, Incheon National University
3Undergraduate Student, Dept of Civil and Environmental Engineering, Incheon National University
4 Associate Professor, Department of Civil and Environmental Engineering, Incheon National University
*교신저자. *Corresponding Author. 
30 March 2018. pp. 45-54
PDF XML Citation
Abstract

In this study, numerical analysis is performed to determine highly influential factors that increase the possibility of asphalt road collapse due to cavity underneath the road. The considered influence factors on road collapse due to underground cavity were the asphalt layer thickness, the cover depth, the cavity width, and the cavity height. The concentrated load and uniform distributed pressure were applied on the top surface of asphalt pavement layers with different shape of cavity and asphalt thickness. For each analysis case of given cavity and asphalt thickness, failure load was analyzed under displacement controlled condition. Based on the analyzed failure loads, the applicability of the cavity management system developed by Seoul city was evaluated. As a result of the analysis, the effect of cavity height on road collapse was not significant while the other factors considerably influenced road collapse. Consequently, degree of road collapse susceptibility should be classified by failure load rather than by the condition of existing cavity.

Keywords
Underground cavity management system
Road collapse
Failure load
Numerical analysis

본 연구에서는 최근 도심지에서 발생하고 있는 지반함몰에 대하여 도로의 붕괴 가능성을 높이는 지하공동 영향인자에 대한 수치해석적 분석을 수행하였다. 지하공동으로 인한 지반함몰 영향 인자는 서울시에서 제안한 공동관리 등급제를 참고하여 아스팔트 포장층의 두께, 토피고, 공동 폭을 고려하였고, 본 연구에서 추가로 공동의 높이를 선정하였다. 이들 영향 인자들을 다양한 범위 내에서 변화시킨 조건에서 지하공동이 있는 아스팔트 포장층 상단에 집중하중과 등분포하중을 각각 변위제어하여 도로 파괴하중을 분석하였다. 분석된 파괴하중을 토대로 서울형 공동관리 등급제에 대한 적용성을 평가하였다. 해석 결과 공동의 높이가 파괴에 미치는 영향은 크지 않았으며 이외의 다른 인자에 따라 복합적으로 파괴하중이 결정되었다. 또한 파괴하중을 기준으로 한 공동분류 방법은 공동 조건을 기준으로 한 분류 방법보다 더 세밀한 분류가 가능하며 파괴 시 물리적인 현상을 반영할 수 있어 더 합리적인 방법이다.

References
1
Cho, H. I., Bang, E. S., Yi, M. J., and Kim, D. S. (2016), “Physical modeling of land subsidence due to underground cavity and its monitoring by electrical resistivity survey in geotechnical centrifuge,” Japanese Geotechnical Society Special Publication, Vol.2, No.72, pp.2469-2472.
2
Geo Search (2014), Method for Evaluating Ground Sink, Geo Search.
3
Kong, S., Oh, D., Lee, Y. Kim, D. and Jung, H. (2017), “Behaviour of Ground around Underground Cavity Resulted from Sewer Leakage,” Proceedings of the 19th International Conference on Soil Mechanics and Geotechnical Engineering, pp.415-418.
4
Lee, K., Kim, D. and Park, J. J. (2017), “Study on Management System of Ground Sinking Based on Under-ground Cavity Grade,” Journal of Korean Geosynthetics Society, Vol.16, No.2, pp.23-33. (in Korean)
5
Lee, K. Y. and Kang, S. J. (2014): Sinkhole; Causes and Countermeasures, Issue & Analysis, Vol. 156, pp.1-23. (in Korean)
6
Lee, S. H., Lee, H. L. and Song, K. I. (2016), “The effect of formation of spherical underground cavity on ground surface settlement : Numerical analysis using 3D DEM,” Journal of Korean Tunnel and Underground Space Association, Vol.18, No.2, pp.129-142. (in Korean)
7
Seoul City (2016), Road Collapse Management Comprehensive Countermeasures Reporter Briefing, Seoul City. (in Korean)
8
Seo, J. W., Choi, J. S. and Kim S. I. (2002), “A Study on Prediction of Layer Properties of Asphalt Concrete Pavement Under Various Vehicle Speeds,” Journal of the Korean Society of Civil Engineers, Vol.22, No.4, pp.649-658. (in Korean)
9
SIMULIA (2014), ABAQUS/CAE User's Manual. Dassault Systemes Simulia Corp., Providence, RI, USA.
Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 17
  • No :1
  • Pages :45-54
  • Received Date : 2017-02-12
  • Revised Date : 2017-03-03
  • Accepted Date : 2017-03-04
  • DOI :https://doi.org/10.12814/jkgss.2018.17.1.045
Journal Informaiton Journal of the Korean Geosynthetics Society Journal of the Korean Geosynthetics Society
  • NRF
  • KOFST
  • KISTI Current Status
  • KISTI Cited-by
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close