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2017 Vol.16, Issue 3
Slope Failure Prediction through the Analysis of Surface Ground Deformation on Field Model Experiment

현장모형실험 기반 표층거동분석을 통한 사면붕괴 예측

Sung-Yong Park1
,
Yeon-Sik Min2
,
Min-seo Kang3
,
Hee-Don Jung3
,
Ghazali-Flimban Sami4
,
Yong-Seong Kim3*
박 성용1
,
민 연식2
,
강 민서3
,
정 희돈3
,
사미 플린바4
,
김 용성3*
1Member, Researcher, National Disaster Management Research Institute
2Korea Land & Housing Corporation
3Ph.D Candidate, Department of Regional Infrastructure Engineering, Kangwon National University
4Ph.D Candidate, Department of Biological Environment, Kangwon National University
Member, Professor, Department of Regional Infrastructure Engineering, Kangwon National University
*교신저자. *Corresponding Author. 
30 September 2017. pp. 1-10
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Abstract

This study carried out several laboratory tests such as water tank settlement test and two-dimensional water flow test to investigate settlement and scour characteristics of a square-shaped hybrid reef which was reinforced with geogrid. In addition, numerical analysis was also performed to find out scour characteristics of the square-shaped hybrid reef with different placement types (type A; straight placement type, type B; zigzag placement type). Laboratory test results indicated that settlement and scouring depth significantly reduced in hybrid reefs reinforced with geogrid, compared with those without reinforcement. Two-dimentional water flow tests and numerical test results also showed that scouring depth and flow velocity of placement type A more decreased than those of type B.

Keywords
Landslide
Slope failure
Ground displacement
Surface ground deformation
Slope failure prediction

최근 발생하고 있는 자연재해 중 산사태와 관련된 재해는 막대한 인명과 재산피해를 발생시키고 있다. 지속적으로 발생하고 있는 산사태로 인한 피해를 최소화하기 위해서는 계측, 모니터링 시스템 등 관련 기술에 대한 과학적 관리체계가 필요하다. 본 연구는 사면붕괴 예측을 통한 산사태 피해저감을 위한 관리체계 확립을 목적으로 하고 있다. 이를 위해 산사태 발생시 지반거동을 예측하기 위한 표층지반변형률 봉을 제작하고, 사면 붕괴전조로서 변형률 증가를 관측하였다. 그 결과, 사면 붕괴 시 지반의 변형은 붕괴 전조 구간, 변형 가속 구간, 변형 급가속 구간을 거친 후 붕괴에 이르는 것으로 나타나, 붕괴 전조 예측과 상관관계가 있는 것으로 판단된다. 모든 조건에서 사면붕괴 전조로서 시간에 따른 변위량의 증가가 공통적으로 관측되 었으며, 이는 붕괴위험 사면의 계측 및 유지관리 관점에서 대단히 중요한 현상으로 판단된다. 산사태 발생에 따른 지반변위는 향후 지속적 연구를 통해 사면붕괴예측 및 계측관리기준의 기초자료로 활용될 수 있을 것으로 사료되며, 산사태 피해저감 및 계측산업 활성화에 기여할 수 있을 것으로 판단된다.

References
1
Chae, B. G., Song, Y. S., Choi, J. H. and Kim, K. S. (2015), The Current Methods of Landslide Monitoring Using Observation Sensors for Geologic Property, Journal of Sensor Science and Technology, Vol.24, No.5, pp.291-298 (in Korean).
2
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Min, Y. S. (2016), A Study on slope failure prediction through the measurement of surface ground deformation, Ph.D. dissertation, Kangwon National University, Korea (in Korean).
9
Tamate, S., Hori, T., Mikuni, C., Itoh, K., Kikkawa, N. and Suemasa, N. (2013), A Large Scale Model Test on Detection of Potential Risk of Slope Failure by Monitoring of Shear Strain in Shallow Section, Journal of Japan Society of Civil Engineers, Vol.69, No.3, pp.326-336.
Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 16
  • No :3
  • Pages :1-10
  • Received Date : 2017-08-09
  • Accepted Date : 2017-09-05
  • DOI :https://doi.org/10.12814/jkgss.2017.16.3.001
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