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Research Article

Compilation of Geotechnical Soil Maps and Assessment of Ground Characteristics for Natural Slopes in the Busan Area

부산지역 자연사면의 지반공학 분포지도 작성 및 지반특성 평가

Young-Suk Song1
,
Kyeong-Su Kim1*
,
Hyun-Ju Oh1
송 영석1
,
김 경수1*
,
오 현주1
1Principal Researcher, Geological Safety Division, Korea Institute of Geoscience and Mineral Resources
1한국지질자원연구원 국토안전연구본부 책임연구원
*Corresponding Author
31 March 2026. pp. 61-73
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Abstract

A total of 280 soil samples were collected from representative natural slopes in Busan, at Baegyangsan, Hwangnyeongsan, Jangsan, and Gudeoksan. Geotechnical soil maps (GSMs) were compiled using kriging interpolation. Seven key geotechnical parameters were considered: specific gravity, silt and clay content, void ratio, dry unit weight, hydraulic conductivity, cohesion, and internal friction angle, which were spatially visualized to assess their regional variability. The results show that Hwangnyeongsan has the highest silt and clay content, while Baegyangsan and Gudeoksan have a relatively high dry unit weight and hydraulic conductivity. Jangsan has the highest cohesion values, whereas Hwangnyeongsan is characterized by a higher internal friction angle. Volcanic rock regions have a higher void ratio and cohesion, sedimentary rock regions have higher specific gravity and higher silt and clay content, and granite regions have a higher dry unit weight and hydraulic conductivity. Furthermore, an inverse exponential relationship was observed between silt and clay content and hydraulic conductivity, with a sharp increasing trend observed in granite regions. The GSMs presented in this study are expected to serve as fundamental data for geotechnical structure design and predicting geohazards such as landslides.

Keywords
geotechnical soil map
Busan area
natural terrain
kriging
soil property

본 연구에서는 부산지역 대표적인 자연산지 권역인 백양산, 황령산, 장산, 구덕산을 대상으로 총 280개 토질시료를 수집 및 분석하고, 지구통계학적 기법인 크리깅을 활용하여 지반공학 분포지도(geotechnical soil maps, GSMs)를 작성하였다. 분석 대상은 비중, 실트 및 점토함유량, 간극비, 건조단위중량, 투수계수, 점착력, 내부마찰각 등 7개 주요 지반정수이며, 이를 공간적으로 시각화하여 지역별 지반특성의 변동성을 제시하였다. 그 결과 황령산은 실트 및 점토함유량이 가장 높았고, 백양산과 구덕산은 건조단위중량과 투수계수가 상대적으로 높게 나타났다. 장산은 점착력이 크게 나타났으며, 황령산은 내부마찰각이 높은 특성을 보였다. 지질조건별로는 화산암 지역에서 높은 간극비와 점착력이, 퇴적암 지역에서 높은 비중과 실트 및 점토함유량이, 화강암 지역에서 높은 건조단위중량과 투수계수가 확인되었다. 또한 실트 및 점토함유량과 투수계수는 지수함수 형태의 반비례 관계를 보였으며, 화강암 지역에서는 급격한 증가경향이 나타났다. 본 연구에서 제시된 지반공학 분포지도(GSMs)는 지반구조물 설계 및 산사태와 같은 지반재해 예측을 위한 기초자료로 활용될 수 있을 것으로 기대된다.

키워드
지반공학 분포지도
부산지역
자연산지
크리깅
토질정수
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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 :61-73
  • Received Date : 2026-01-26
  • Revised Date : 2026-02-25
  • Accepted Date : 2026-02-26
  • DOI :https://doi.org/10.9720/kseg.2026.1.061
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