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2023 Vol.65, Issue 5
Prediction of Compaction, Strength Characteristics for Reservoir Soil Using Portable Static Cone Penetration Test

휴대용 정적 콘 관입시험을 통한 저수지 제방 토양의 다짐, 강도 특성 및 사면 안정성 예측

Jihun Jeona
,
Younghwan Sonb†
,
Taejin Kimc
,
Sangbeom Jod
,
Seungjoo Junge
,
Jun Heof
,
Taeho Bongg
,
Donggeun Kimh
전 지훈a
,
손 영환b†
,
김 태진c
,
조 상범d
,
정 승주e
,
허 준f
,
봉 태호g
,
김 동근h
aPh.D. Student, Department of Rural Systems Engineering, Seoul National University
bProfessor, Department of Rural Systems Engineering and Research Institute for Agriculture and Life Sciences, Seoul National University
cPh.D. Student, Department of Rural Systems Engineering, Seoul National University
dMD Student, Department of Rural Systems Engineering, Seoul National University
eUndergraduate Student, Department of Rural Systems Engineering, Seoul National University
fResearcher, Rural Research Institute, Korea Rural Community Corporation
gAssistant Professor, Department of Forest Science, Chungbuk National University
hPostdoctoral Researcher, Graduate School of Agriculture, Kyoto University
a박사 서울 국립 대학교 농촌 시스템 공학과 학생
b강 농촌 시스템 공학과 교수 서울 대학교 생명 과학 연구소 교수
c박사 서울 국립 대학교 농촌 시스템 공학과 학생
dMD 학생, 서울 국립 대학교 농촌 시스템 공학과
e서울 국립 대학교 농촌 시스템 공학과 학부생
f농촌 연구소, 한국 농촌 지역 사회 공동 연구원
gChungbuk National University 산림 과학과 조교수
h교토 대학교 농업 대학원 연구원
† Corresponding author Tel.: +82-2-880-4585, Fax: +82-2-873-2087 E-mail: syh86@snu.ac.kr
2023. pp. 1-11
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Abstract

Due to climate change and aging of reservoirs, damage to embankment slopes is increasing. However, the safety diagnosis of the reservoir slope is mainly conducted by visual observation, and the time and economic cost are formidable to apply soil mechanical tests and slope stability analysis. Accordingly, this study presented a predicting method for the compaction and strength characteristics of the reservoir embankment soil using a portable static cone penetration test. The predicted items consisted of dry density, cohesion, and internal friction angle, which are the main factors of slope stability analysis. Portable static cone penetration tests were performed at 19 reservoir sites, and prediction equations were constructed from the correlation between penetration resistance data and test results of soil samples. The predicted dry density and strength parameters showed a correlation with test results between R2 0.40 and 0.93, and it was found to replace the test results well when used as input data for slope stability analysis (R2 0.8134 or more, RMSE 0.0320 or less). In addition, the prediction equations for the minimum safety factor of the slope were presented using the penetration resistance and gradient. As a result of comparing the predicted safety factor with the analysis results, R2 0.5125, RMSE 0.0382 in coarse-grained soil, R2 0.4182 and RMSE 0.0628 in fine-grained soil. The results of this study can be used as a way to improve the existing slope safety diagnosis method, and are expected to be used to predict the characteristics of various soils and inspect slopes.

Keywords
Portable static cone penetration test
dry density
cohesion
internal friction
slope stability
References

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Information
  • Publisher :The Korean Society of Agricultural Engineers
  • Publisher(Ko) :한국농공학회
  • Journal Title :Journal of Korean Society of Agricultural Engineers
  • Journal Title(Ko) :한국농공학회논문집
  • Volume : 65
  • No :5
  • Pages :1-11
  • Received Date : 2023-05-01
  • Revised Date : 2023-05-25
  • Accepted Date : 2023-06-08
  • DOI :https://doi.org/10.5389/KSAE.2023.65.5.001
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