휴대용 정적 콘 관입시험을 통한 저수지 제방 토양의 다짐, 강도 특성 및 사면 안정성 예측
Prediction of Compaction, Strength Characteristics for Reservoir Soil Using Portable Static Cone Penetration Test
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Due to climate change and aging of reservoirs, damage to embankment slopes is increasing. However, the safety diagnosis of the reservoir slope ismainly 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 portablestatic cone penetration test. The predicted items consisted of dry density, cohesion, and internal friction angle, which are the main factors of slopestability analysis. Portable static cone penetration tests were performed at 19 reservoir sites, and prediction equations were constructed from thecorrelation between penetration resistance data and test results of soil samples. The predicted dry density and strength parameters showed a correlationwith 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 (R20.8134 or more, RMSE 0.0320 or less). In addition, the prediction equations for the minimum safety factor of the slope were presented using thepenetration resistance and gradient. As a result of comparing the predicted safety factor with the analysis results, R2 0.5125, RMSE 0.0382 incoarse-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 slopesafety diagnosis method, and are expected to be used to predict the characteristics of various soils and inspect slopes.
Abstract
Due to climate change and aging of reservoirs, damage to embankment slopes is increasing. However, the safety diagnosis of the reservoir slope ismainly 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 portablestatic cone penetration test. The predicted items consisted of dry density, cohesion, and internal friction angle, which are the main factors of slopestability analysis. Portable static cone penetration tests were performed at 19 reservoir sites, and prediction equations were constructed from thecorrelation between penetration resistance data and test results of soil samples. The predicted dry density and strength parameters showed a correlationwith 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 (R20.8134 or more, RMSE 0.0320 or less). In addition, the prediction equations for the minimum safety factor of the slope were presented using thepenetration resistance and gradient. As a result of comparing the predicted safety factor with the analysis results, R2 0.5125, RMSE 0.0382 incoarse-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 slopesafety diagnosis method, and are expected to be used to predict the characteristics of various soils and inspect slopes.
참고문헌 (27)
- Byun, Y. H., "In-situ modulus detector for subgrade characterization", International Journal of Pavement Engineering, 23(2), pp.297~307 (2022)[DOI]
- Cassan, M., "Les essais in situ en méchanique des sols, Volume 1 réalisation et interpretation", pp.146~151 (1988), Eyrolles
- Dwipa, R. S., "Evaluation of liquefaction potential using cone penetration test(CPT)and standard penetration test(SPT)", Journal of Physics : Conference Series, 1450(1), pp.012016~ (2020)
- 허준, "기후변화 시나리오에 따른 소규모 저수지의 홍수 취약성 평가- 경기도 내 저수지를 중심으로 -", 한국농공학회논문집, 64(5), pp.53~65 (2022), 한국농공학회
- 전건영, "소규모 저수지의 특성을 고려한 제체 안전진단의 정량적 상태평가 기준 개선", 한국농공학회논문집, 63(5), pp.27~38 (2021), 한국농공학회[DOI]
- KATS(Korean Agency for Technology and Standards), "Standard test method for thin-walled tube sampling of soils : KS F 2317", ~ (2021)
- KATS(Korean Agency for Technology and Standards), "Test method for particle size distribution of soils :KS F 2302", ~ (2022)
- KATS(Korean Agency for Technology and Standards), "Test method for liquid limit and plastic limit of soils:KS F 2303", ~ (2022)
- KATS(Korean Agency for Technology and Standards), "Test method for density of soil particles : KS F 2308", ~ (2022)
- KATS(Korean Agency for Technology and Standards), "Test method for density of soil in place by sand-cone method : KS F 2311", ~ (2022)
- KATS(Korean Agency for Technology and Standards), "Test method for soil compaction in laboratory : KS F 2312", ~ (2022)
- KATS(Korean Agency for Technology and Standards), "Unified Soil Classification System : KS F 2324", ~ (2022)
- KATS(Korean Agency for Technology and Standards), "Test method for direct shear test of soils under consolidated drained conditions : KS F 2343", ~ (2022)
- 김규선, "평판재하시험, 흙강성측정기 및 동적콘관입시험기를 이용한 노상토의 탄성계수 비교", 한국지반공학회논문집, 31(3), pp.63~72 (2015), 한국지반공학회
- 김지남, "표준관입저항치와 정적콘관입저항치의 상관성에 관한 연구-영동지역의 연약지반을 중심으로-", 한국지반환경공학회 논문집, 7(5), pp.13~20 (2006), 한국지반환경공학회
- Kim, K., "Effect of penetration rate on cone penetration resistance in saturated clayey soils", Journal of Geotechnical and Geoenvironmental Engineering, 134(8), pp.1142~1153 (2008)[DOI]
- 김영석, "동적 콘관입시험기를 이용한 폐석회 혼합 도로노반 성토체의 현장 지지력 평가", 한국산학기술학회논문지, 12(2), pp.927~935 (2011), 한국산학기술학회
- The Use of the Dynamic Cone Penetrometer(DCP), "Kleyn, E. G.", Transvaal Roads Department, ~, pp.Report 2 (1975), 74
- KRC(Korea Rural Community Corporation), "Statistical yearbook of land and water development for agriculture" (2020), KRC
- 이봉직, "동적콘관입시험값과 표준관입시험값의 상관성 분석", 한국지반환경공학회 논문집, 15(8), pp.23~30 (2014), 한국지반환경공학회[DOI]
- Lee, J. S., "Assessing subgrade strength using an instrumented dynamic cone penetrometer", Soils and Foundations, 59(4), pp.930~941 (2019)[DOI]
- 이광우, "보강토옹벽의 피해원인 규명을 위한 휴대형 동적콘관입시험(DCPT) 적용사례 분석 및 효용성 평가", 한국지반신소재학회 논문집, 19(4), pp.95~109 (2020), 한국지반신소재학회
- 이무철, "인공신경망을 이용한 풍화토의 강도정수 산정", 한국구조물진단유지관리공학회 논문집, 12(3), pp.147~154 (2008), 한국구조물진단유지관리공학회
- Livneh, M., "Effect of vertical confinement on dynamic cone penetrometer strength values in pavement and subgrade evaluations", Transportation Research Record, pp.1~1 (1995)
- MAFRA(Ministry of Agriculture, Food and Rural Affairs), "Agricultural Design Standards – Fill dams", ~ (2002)
- ME(Ministry of Environment), "Korean Design Standard (KDS) 54 30 00 : 2022 - Fill dams", ~ (2022)
- 박재성, "휴대용콘의 선단저항값을 이용한 모래의 상대밀도 및 내부마찰각 추정", 한국농공학회논문집, 54(4), pp.137~145 (2012), 한국농공학회[DOI]