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)

서지정보

· 발행기관 : 한국농공학회
· 수록지 정보 : 한국농공학회논문집 / 65권 / 5호 / 1 ~ 11페이지
· 저자명 : 전지훈, 손영환, 김태진, 조상범, 정승주, 정승주, 허준, 봉태호, 김동근

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.

영어초록

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.

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