A numerical modeling study on the seepage under embankment dams

Kheiri, Ghazaleh; Javdanian, Hamed; Shams, Gholamreza

doi:10.1007/s40808-020-00742-9

Cited by 21 publications

(10 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…For this purpose, a numerical model is developed for replicating results from physical model tests considering turbulence of the flow. Hence, an important aspect of the present study is the implementation of a geotechnical software [20] commonly employed in dam engineering for practical applications as well as in research [21,22]. However, the modeling usually assumes laminar flow or Darcy flow conditions, suitable for cases as in Figure 1a.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of the Effects of Toe Configuration on Throughflow in Rockfill Dams

Smith

Ravindra

Sigtryggsdóttir

2021

Water

View full text Add to dashboard Cite

The rockfill toe structure situated within the downstream slope of rockfill dams is an integral part of a defense mechanism safeguarding the dam structure in throughflow situations. Recent studies have concluded that the rockfill toe structure can have significant impacts on throughflow development and stability of rockfill dams under scenarios of accidental throughflow caused by overtopping of the dam core. The ability to numerically model the effect of various toe configurations on flow through rockfill dams can support the design of effective toe drainage structures for rockfill dams. Development and calibration of a reliable numerical modeling tool in this regard has been challenging owing to lack of availability of extensive datasets from physical modeling investigations. This study further employs datasets gathered by a recent physical modeling study investigating the effects of various toe configurations on throughflow development in rockfill dam models. A commercial numerical seepage modeling tool with an option for non-Darcy flow was calibrated against the datasets with good calibration metrics. The study is novel in providing a rare report on the usage of this option. The calibrated tool can further be employed to carry out a wide array of simulations to arrive at an ideal design for a toe structure for rockfill dams and for assessment of hydraulic performance of toe structures.

show abstract

“…Among many other factors, seepage remains to be a very important factor that has to be carefully investigated and controlled when designing embankment dams [3]. The significance of controlling seepage is brought by the fact that excessive seepage through the embankment can pose a significant threat to the stability of the dam and eventually leading to its failure.…”

Section: Introductionmentioning

confidence: 99%

Toe drain size and slope stability of homogeneous embankment dam under rapid drawdown

Mkilima

2021

tbus

View full text Add to dashboard Cite

The slope stability of an embankment dam has been always a serious concern of any design team. Unfortunately, the information on the potential influence of a toe drain size on the slope stability of an embankment dam under rapid drawdown conditions is still scarce. This study investigated the potential effect of a toe drain size on the slope stability of a homogeneous embankment dam under rapid drawdown conditions. Three different sizes (5m, 10m, and 15m) of the toe drain were investigated under instantaneous (worst scenario) and 5 days (more realistic) drawdown rates with the help of numerical modeling in GeoStudio. From the results, it was observed that the pore-water pressures at the upstream face of the embankment decreased with the increase in the toe drain size, while the pore-water pressures at the downstream toe were increasing with the increase in the toe drain size. The factor of safety values were also observed to be affected by the changes in the toe drain size.

show abstract

A numerical modeling study on the seepage under embankment dams

Cited by 21 publications

References 17 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 Modeling of the Effects of Toe Configuration on Throughflow in Rockfill Dams

Toe drain size and slope stability of homogeneous embankment dam under rapid drawdown

Contact Info

Product

Resources

About