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2025 Vol.18, Issue 4 Preview Page

Case Study

A Case Study on Hazard Assessment of Ground Creep Areas Based on Geophysical Exploration

물리탐사 기반의 땅밀림 지역 위험성평가 사례연구

Seung-Woo Lee1
,
Kye-Won Jun2*
이 승우1
,
전 계원2*
1Principal Researcher, Engineering Business Division, National Forestry Cooperative Federation
2Professor, Graduate School of Disaster Prevention, Kangwon National University
1산림조합중앙회 엔지니어링사업본부 책임연구원
2강원대학교 방재전문대학원 교수
*Corresponding Author
31 December 2025. pp. 33-39
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Abstract

This study quantitatively analyzed the characteristics of areas affected by land creep through geophysical survey. To assess the scale of the land creep, the site was divided into upper, middle, and lower sections, and investigations were conducted on geological, soil, topographical, hydrological, and forest characteristics. Soil samples were collected and tested in the laboratory to determine soil properties such as moisture content, internal friction angle, and permeability coefficient. In addition, seismic and electrical resistivity surveys were conducted to analyze subsurface characteristics. Using these data, slope stability analyses were performed to evaluate the risk of ground failure during both dry and rainy seasons, thereby assessing the likelihood of collapse due to soil creep. The study site was a slope in Wongil-ri, Bongpyeong-myeon, Pyeongchang-gun, Gangwon-do, where soil creep is actively occurring. Although the land creep is not easily identifiable by visual inspection, the creeping area was found to be uplifted weathered bedrock at the lower slope, and it was determined to be at risk of collapse during the rainy season. Through multiple geophysical investigations, this study identified the characteristics of creeping slopes and suggests that these findings can inform effective risk management strategies for such areas.

Keywords
Land creep
Risk assessment
Geophysical survey
Slope stability analysis

본 연구에서는 물리탐사를 통하여 땅밀림이 발생하는 지역의 특징을 정량적으로 분석하였다. 땅밀림의 규모를 파악하기 위하여 상단부, 중단부, 하단부로 구분하여 지질, 토양, 지형, 수리, 산림 특성을 조사하였다. 토질 시료를 채취하여 실내실험을 통해 함수율, 마찰각, 투수계수 등의 토질 특성의 값을 추출하고, 탄성파 탐사와 전기비저항 탐사를 통해 지반구조의 특성을 분석하였다. 이러한 값들을 이용해 사면안정해석을 수행하여 건기와 우기시의 지반 붕괴 위험성을 평가하여 땅밀림으로 인한 붕괴 여부를 판단하였다. 위험성 평가 대상지는 강원도 평창군 봉평면 원길리의 사면으로 땅밀림이 발생한 지역이다. 대상지는 육안으로 구분하기 어려운 땅밀림 지역으로 사면 하부의 풍화암층이 솟아오른 것으로 분석되었으며 우기시 붕괴가 가능한 지역인 것으로 분석되었다. 이러한 땅밀림 지역에 대한 다수의 물리탐사를 통해 땅밀림의 특성을 규명하여 붕괴 위험성에 대한 관리방안을 제시할 수 있을 것으로 판단된다.

키워드
땅밀림
위험성 평가
물리탐사
사면안정해석
References
1

Alexopoulos, J. D., I. K. Giannopoulos, V. Gkosios, S. Dilalos, N. Voulgaris, and S. E. Poulos. (2025). Investigating a Large-Scale Creeping Landmass Using Remote Sensing and Geophysical Techniques—The Case of Stropones, Evia, Greece. Geosciences. 15(282): 1-26.

10.3390/geosciences15080282
2

Deshpande, N. S., D. J. Furbish, P. E. Arratia, and D. J. Jerolmack. (2021). The Perpetual Fragility of Creeping Hillslopes. Nature Communications. 12: 3909.

10.1038/s41467-021-23979-z34162848PMC8222271
3

Furbish, D. J. and S. Fagherazzi. (2001). Stability of Creeping Soil and Implications for Hillslope Evolution. Water Resources Research. 37(10): 2607-2618.

10.1029/2001WR000239
4

Handwerger, A. L., A. W. Rempel, R. M. Skarbek, and G. E. Hilley. (2016). Rate-Weakening Friction Characterizes Both Slow Sliding and Catastrophic Failure of Landslides. Earth, Atmospheric, and Planetary Sciences. 113(31): 10281-10286.

10.1073/pnas.160700911327573836PMC5027430
5

Kim, Jong Tae, Jung Hyun Kim, Chang Hun Lee, Seong Cheol Park, Chang Ju Lee, and Gyo Cheol Jeong. (2023). Monitoring Landcreep Using Terrestrial LiDAR and UAVs. The Journal of Engineering Geology. 33(1): 27-37.

10.9720/KSEG.2023.1.027
6

Kirkby, M. J. (1967). Measurement and Theory of Soil Creep. The Journal of Geology. 75(4): 359-378.

10.1086/627267
7

Lin, W. K., B. Mao, B. Duan, X. W. Tang, X. D. Pan, H. C. Xue, and H. Y. Sun. (2025). Numerical Analysis of Pile-Supported Reinforced Embankments in Deep Soft Soil Regions Based on Soft Soil Creep Parameter Optimization. Advances in Civil Engineering. 2025(1): 1759641.

10.1155/adce/1759641
8

Luo, Q. and X. Chen. (2014). Experimental Research on Creep Characteristics of Nansha Soft Soil. The Scientific World Journal. 2041(1): 1-8.

10.1155/2014/96873824526925PMC3913029
9

National Institute of Forest Science (2019). Status and Management Strategies for Land Creep. Seoul: NIFoS.

10

Varnes, D. J. (1978). Slope Movement Types and Processes. Transportation Research Board Special Report. 11-33.

Korean References Translated from the English

1

국립산림과학원 (2019). 땅밀림 현황 및 관리전략. 서울: 국립산림과학원.

2

김종태, 김정현, 이창훈, 박성철, 이창주, 정교철 (2023). 지상라이다와 드론을 이용한 땅밀림 모니터링 연구. 지질공학. 33(1): 27-37.

10.9720/KSEG.2023.1.027
Information
  • Publisher :Korean Society of Disaster and Security
  • Publisher(Ko) :한국방재안전학회
  • Journal Title :Journal of Korean Society of Disaster and Security
  • Journal Title(Ko) :한국방재안전학회 논문집
  • Volume : 18
  • No :4
  • Pages :33-39
  • Received Date : 2025-12-17
  • Revised Date : 2025-12-29
  • Accepted Date : 2025-12-29
  • DOI :https://doi.org/10.21729/ksds.2025.18.4.33
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