A Comparison of Model Concepts and Experiments for Seepage Processes Through a Dike with a Fault Zone

Pham-Van, Song; Hinkelmann, Reinhard; Nehrig, Marko; Martinez, Isaac

doi:10.1080/19942060.2011.11015359

Cited by 6 publications

(3 citation statements)

References 4 publications

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“…Such situation demands the use of physical-based models to determine the model inputs and the associated output predictions before introducing other simulation models. This case is particularly when there are not enough field data and thus an accurate prediction is desired when conceiving the physics [35,36].…”

Section: Example Of Seepage Analysis Using Seep/w Modelsmentioning

confidence: 99%

Experimental and Numerical Analysis for Earth-Fill Dam Seepage

et al. 2020

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Earth-fill dams are the most common types of dam and the most economical choice. However, they are more vulnerable to internal erosion and piping due to seepage problems that are the main causes of dam failure. In this study, the seepage through earth-fill dams was investigated using physical, mathematical, and numerical models. Results from the three methods revealed that both mathematical calculations using L. Casagrande solutions and the SEEP/W numerical model have a plotted seepage line compatible with the observed seepage line in the physical model. However, when the seepage flow intersected the downstream slope and when piping took place, the use of SEEP/W to calculate the flow rate became useless as it was unable to calculate the volume of water flow in pipes. This was revealed by the big difference in results between physical and numerical models in the first physical model, while the results were compatible in the second physical model when the seepage line stayed within the body of the dam and low compacted soil was adopted. Seepage analysis for seven different configurations of an earth-fill dam was conducted using the SEEP/W model at normal and maximum water levels to find the most appropriate configuration among them. The seven dam configurations consisted of four homogenous dams and three zoned dams. Seepage analysis revealed that if sufficient quantity of silty sand soil is available around the proposed dam location, a homogenous earth-fill dam with a medium drain length of 0.5 m thickness is the best design configuration. Otherwise, a zoned earth-fill dam with a central core and 1:0.5 Horizontal to Vertical ratio (H:V) is preferred.

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Section: Example Of Seepage Analysis Using Seep/w Modelsmentioning

confidence: 99%

Experimental and Numerical Analysis for Earth-Fill Dam Seepage

et al. 2020

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“…The physical model shown in Figure 1 satisfied the stress equilibrium equation (Equation 5). Since the steady flow seepage of fluid obeyed Darcy's law Q = K A P μL (Pham-Van et al, 2011), the second-order derivative of the equation revealed that the pore pressure distribution around the wellbore was controlled by the Laplace equation as:…”

Section: Calculation Of Seepage Force Stress Fieldmentioning

confidence: 99%

Numerical study of the influence of seepage force on the stress field around a vertical wellbore

Zhou

Wang

et al. 2020

Engineering Applications of Computational Fluid Mechanics

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“…Khaleghi (2010, 2012) made several experimental analyses of seepage flow under coastal dikes and laboratory investigations of seepage control measures under coastal dikes. Pham- Van, Reinhard, and Marko (2011) performed experimental studies and numerical simulations of seepage processes through a dike. However, scholars have only made theoretical analyses about the role of waves, tides and other factors under seawall internal seepage predecessors.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of seawall piping under water level fluctuation

Chen

Zhao

et al. 2013

European Journal of Environmental and Civil Engineering

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The hydraulic action, such as waves, tides and floods, is the main cause of piping failure in seawall engineering, while the suffusion failure mechanism in this case has not been specially studied. Indoor experimental studies of piping failure of seawall under the waves and tidal water level fluctuations are still in a blank state. Based on the designed experimental devices in the research work, six groups of model tests were carried out with crushed and round gravel. The seepage velocity, seepage gradient, permeability coefficient and the fine particle movement trends were analysed. The changing rules of these variables under water level cycle were studied. It has been found that the critical hydraulic gradient of the fine piping particles inside the seawall became smaller with the increase in water level fluctuation cycles. At the same time, the critical flow velocity tended to increase gradually. The piping occurrence probability in the round gravel-filled seawall was larger than that in the crushed gravel-filled seawall. The internal fine-grained structure showed dynamic changes in migration under the fluctuation of the water level cycle.

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A Comparison of Model Concepts and Experiments for Seepage Processes Through a Dike with a Fault Zone

Cited by 6 publications

References 4 publications

Experimental and Numerical Analysis for Earth-Fill Dam Seepage

Experimental and Numerical Analysis for Earth-Fill Dam Seepage

Numerical study of the influence of seepage force on the stress field around a vertical wellbore

Experimental study of seawall piping under water level fluctuation

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