Abstract
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.
Highlights
Among the national infrastructure facilities, dams serve important functions such as that of electricity production and flood control, as well as water supply for living, industry, and agriculture
As shown in the figure, the porewater pressure meters classified as groups: internal (Group A) were located primarily in the upper/lower part of the upstream dam, whereas those classified as Group B were mainly distributed in the downstream part/intermediate part of the dam, and those classified as group C were mainly distributed in the upper part of the upstream dam
Analysis in Group A showed high coefficient of correlation with water level, we propose a model that can predict in theGroup porewater pressure according toof the
Summary
Among the national infrastructure facilities, dams serve important functions such as that of electricity production and flood control, as well as water supply for living, industry, and agriculture. [7], cases of collapse of rockfill dams in the USA were recent development of measuring technology nationally and ab analyzed, with 44% of the damage being found to be caused by leaks and piping through the operation of instruments have been stable, o dam’s body or foundation, and finding that the porewater pressureand meterthe is animportance important measurement item for monitoring this type of destruction For this reason, research on the meter, which is a major measurement item of the fill dam, has em use of porewater pressure is being actively conducted (Wang et al, 2018 [8]). We intended to analyze the correlation between the porewater pressure installed in the fillSubject dam and theto water of the dam, and conducted a stability evaluation
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