Detection Model for Seepage Behavior of Earth Dams Based on Data Mining

Jiang, Zhenxiang; He, Jinrong

doi:10.1155/2018/8191802

Cited by 7 publications

(8 citation statements)

References 15 publications

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“…Khassaf and Madhloom (2017) studied the effect of permeability and core thickness on the determination of hydraulic gradient, output gradient, saturation, and total pressure using numerical methods. Also, Lee et al (2018), Al-Janabi et al (2020), Aboelela (2016), Venkatesh and Karumanch (2016), Jiang and He (2018), Qiu et al (2016) and Kheiri et al (2020) in separate studies examined the seepage of earth dams. In this study, the results of the pore water pressure and seepage discharge of the Eyvashan earth dam were compared with the results of the numerical analysis by Geostudio software.…”

Section: Introductionmentioning

confidence: 99%

An Investigation on performance of the cut off wall and numerical analysis of seepage and pore water pressure of Eyvashan earth dam

Beiranvand

Komasi

2021

Iran J Sci Technol Trans Civ Eng

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One of the most important issues in earth dams is the control rate of seepage from the foundation and dam bodies. Due to the site of the dams, to increase the creep length and reduce the seepage, there are several methods for sealing the reservoir of dams that construction of the cut-off wall under the clay core of the dams is one of the most effective methods. In this study, the seepage rate and pore water pressure of the Eyvashan earth dam, comparison of instrument results with the results of numerical analysis and, finally, the performance of the cut-off wall are investigated. According to the results of instrumental and numerical analysis, the maximum seepage rate in full reservoir conditions is equal to 831,604 m3/year. To fit the data of instrumentation and numerical analysis, multivariate regression was used and the coefficient of determination was used which R2 = 0.9892 and R2 = 0.9834, respectively, were obtained for seepage and pore water pressure. Very good agreement between the results of the observed data and the predicted data indicates the proper behavior of the dam in terms of pore water pressure. Also, due to the results of numerical simulation and instrumentation, the pore water pressure in the downstream part of the cut-off wall is suddenly dropped, which indicates the correct operation of the cut-off wall.

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Section: Introductionmentioning

confidence: 99%

An Investigation on performance of the cut off wall and numerical analysis of seepage and pore water pressure of Eyvashan earth dam

Beiranvand

Komasi

2021

Iran J Sci Technol Trans Civ Eng

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“…Many numerical analyses have been carried out to investigate the interaction between overburden soils and the cut-off wall of embankment dams; so, the influence of the cut-off wall's thickness, the properties of alluvium deposits, the valley boundary, and the cut-off wall construction sequences on the stress-deformation behavior of cut-off walls have been studied [11,12]. Also, Lee et al [13], Al-Janabi et al [14], Aboelela [15], Venkatesh and Karumanch [16], Jiang and He [17], Qiu et al [18], and Kheiri et al [19] in separate studies examined the seepage of various embankment dams around the world.…”

Section: Introductionmentioning

confidence: 99%

Numerical analyses of embankment dams containing plastic concrete cut-off walls using finite difference method (A case study: The Karkheh Embankment Dam)

Pisheh¹,

Hosseini²

2021

Global J. Eng. Tech. Adv.

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In this paper, numerical analyses have been performed on the Karkheh embankment dam with a clayey core and plastic concrete cut-off wall during construction, impounding, and permanent seepage stages. The dam has 127 meters height and is located in a high seismic hazard zone in Iran. Different stages of construction, water impounding, and steady state seepage were modelled and analyzed using the hyperbolic and Mohr-Coulomb models with the two dimensional finite difference method (FDM). So, nonlinear analyses were performed using FLAC 2D to investigate the settlements and the pore water pressure changes in different zones of the dam during above-mentioned stages and the results were compared to those of the other studies. The results show that at the end of the construction stage, the maximum settlement equal to 1.45m occurs inside the clay core at the height of 65m. Then, after impounding of the reservoir and steady state stage, the maximum magnitude of the horizontal deformations occurs in the downstream of the dam equal to 0.55m; however, these magnitudes reach to 0.17m at the crest of the dam. Moreover, it was shown that the maximum horizontal displacement of the plastic concrete cut-off wall has happened at the top of the wall in the clay core which is in a good agreement with the other studies’ result.

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“…Seepage erosion occurs when the water flowing through a crack or defect erodes the soil from the walls of the crack or defect [9][10][11][12]. erefore, seepage monitoring is the most important approach to preventing damage due to seepage problems [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Seepage Behavior of Earth Dams Considering Rainfall Effects

Lee¹,

Kim²,

Kang

2018

Advances in Civil Engineering

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More than 60% of annual rainfall in Korea is concentrated during the monsoon season from June to August because of the climate characteristics of East Asia. In general, reservoir water levels sharply rise during this period and rock-fill dams are exposed to various types of damages such as soil erosion and piping related to seepage problems. However, the detection of seepage problems is generally more difficult because rainfall directly flows into a V-notch weir according to a downstream shell in which seepage rates can be measured downstream. In this paper, rainfall is filtered out from the measured seepage rates to evaluate the effects of rainfall by using a digital filtering method for two large rock-fill dams (Dams A and B). Seepage behavior for these two large rockfill dams was estimated as a steady-state condition. It has been proven that with the application of a digital filter which filters out rainfall-induced infiltration into a downstream shell from a measured seepage flow would make analyzing the seepage behavior of dams more effective. is also shows that consideration for any rainfall effect on the seepage behavior of earth dams is very important. e seepage rate of Dam A was not significantly affected by rainfall because the seepage water was collected inside the dam body and was transferred to a V-notch weir located downstream from the dam through a steel pipe. On the contrary, the seepage rate of Dam B was greatly influenced by rainfall in the rainy season. Also, the permeability of the core zones for Dams A and B was estimated at 8.5 × 10 −5 cm/sec and 2.7 × 10 −5 cm/sec, respectively, by a simplified method.

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Detection Model for Seepage Behavior of Earth Dams Based on Data Mining

Cited by 7 publications

References 15 publications

An Investigation on performance of the cut off wall and numerical analysis of seepage and pore water pressure of Eyvashan earth dam

An Investigation on performance of the cut off wall and numerical analysis of seepage and pore water pressure of Eyvashan earth dam

Numerical analyses of embankment dams containing plastic concrete cut-off walls using finite difference method (A case study: The Karkheh Embankment Dam)

Seepage Behavior of Earth Dams Considering Rainfall Effects

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