Behavior of Porewater Pressures in an Earth Dam by Principal Component Analysis

Water

Jiseong Kim¹  Gichun Kang²  Seong-Kyu Yun³  Eun-Sang Im⁴ 

[1] Department of Cadastre & Civil Engineering, Vision College of Jeonju, Jeongju 55069, Korea;Department of Civil Engineering, College of Engineering, Gyeongsang National University, Jinju 52828, Korea;Engineering Research Institute, Gyeongsang National University, Jinju 52828, Korea;Water Energy & Infrastructure Research Center, K-water, Daejeon 34045, Korea;

关键词: fill dam;    principal components analysis;    porewater pressure;    seepage line;    regression analysis;   

DOI  :  10.3390/w14040672

来源: DOAJ

【 摘 要 】

This study deals with the utilization of the pore pressure meter for evaluating the stability of a dam through the correlation between the porewater pressure installed in the fill dam and the water level of the dam. To this end, principal components analysis was performed on a total of 18 porewater pressure meters, and the main components were classified into three groups: internal (Group A), external (Group B), and upper (Group C), on the basis of the seepage line formed within the dam body. The coefficient of correlation between the porewater pressure and water level was found to be 0.86 to 1.00, indicating a strong positive linear relationship. This means that the maintenance of the dam is possible through the pore pressure meter present in Group A. Furthermore, the regression analysis for porewater pressures and water levels resulted in a linear regression model with the coefficient of determination (R²) of Group A being between 0.74 and 0.99. In particular, R² between the power water pressure installed at the base of the dam and the water level was more than 0.99. Therefore, it was shown that the prediction of the porewater pressure is possible by using the relationships with the water level, making it possible to determine the safety of the dam by comparing it with the currently measured values.

【 授权许可】

Unknown