Detection of Permeability Defects Within Dams and Levees Through Coupled Seepage and Heat Transport Analyses

Cesali, Chiara; Federico, Vincenzo

doi:10.1007/978-3-319-99423-9_23

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…Among the proactive measures to strengthen vulnerable sections of levees, the implementation of a comprehensive monitoring system can play a crucial role in identifying and controlling erosion mechanisms before failure occurs. Various monitoring techniques, such as piezometers, thermal sensors, and remote sensing, along with specific and advanced experiments, are available today to assess the health and stability of earthen levees [30][31][32]. By integrating these monitoring methods, authorities can obtain real-time data and valuable insights into the condition of levees, allowing for timely and effective interventions to mitigate potential risks and prevent catastrophic failures.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Levee Erosion during Overflow and Infiltration with Varied Hydraulic Conductivities of Levee and Foundation Properties in Saturated Conditions

Ali

Tanaka

2023

GeoHazards

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This study investigated erosion during infiltration and overflow events and considered different grain sizes and hydraulic conductivity properties; four experimental cases were conducted under saturated conditions. The importance of understanding flow regimes during overflow experiments including their distinct flow characteristics, shear stresses, and erosion mechanisms in assessing the potential for levee failure are discussed. The failure mechanism of levee slopes during infiltration experiments involves progressive collapse due to piping followed by increased liquefaction and loss of shear stress, with the failure progression dependent on the permeability of the foundation material and shear strength. The infiltration experiments illustrate that the rate of failure varied based on the permeability of the foundation material. In the case of IO-E7-F5, where the levee had No. 7 sand in the embankment and No. 5 sand in the foundation (lower permeability), the failure was slower and limited. It took around 90 min for 65% of the downstream slope to fail, allowing more time for response measures. On the other hand, in the case of IO-E8-F4, with No. 8 sand in the embankment and No. 4 sand in the foundation (higher hydraulic conductivity), the failure was rapid and extensive. The whole downstream slope failed within just 18 min, and the collapse extended to 75% of the levee crest. These findings emphasize the need for proactive measures to strengthen vulnerable sections of levees and reduce the risk of extensive failure.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Levee Erosion during Overflow and Infiltration with Varied Hydraulic Conductivities of Levee and Foundation Properties in Saturated Conditions

Ali

Tanaka

2023

GeoHazards

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“…The embankment dam slope is a key component of flood control and disaster mitigation systems, and their seepage characteristics are important research topics in geotechnical and hydraulic engineering (Foster et al, 2000a;Cesali and Federico, 2019;Yang et al, 2019;Jiang et al, 2020). More specifically, leakage is a common type of damage to embankment dam slopes (Foster et al, 2000b;Chaney et al, 2000;Razavi et al, 2020a) and is usually accompanied by internal erosion.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Analysis of the Leakage Characteristics of an Embankment Dam Slope With Internal Erosion

Ding

Wang

et al. 2022

Front. Earth Sci.

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Leakage is a common defect of embankment dam slopes, and is usually accompanied by internal erosion. This study establishes a mathematical two-phase seepage coupling model that explicitly considers the effects of internal erosion. With the help of finite element software COMSOL Multiphysics®, we use this model to study the characteristics of fluid seepage, the fraction of leakage volume that is made up of migrated fine particles (migrated fine particles volume fraction), porosity, permeability, and displacement in the leakage process of a three-dimensional embankment dam slope, as well as to study the influence of the water level and leakage outlet size on the aforementioned features. Our results show that water seepage velocity gradually increases with time, especially at the downstream leakage outlet. Therefore, the erosion and migration of fine particles occur primarily at the downstream leakage outlet, resulting in a significant increase in the migrated fine particles volume fraction, porosity, and permeability. In addition, the maximum migrated fine particles volume fraction, the maximum porosity, and the maximum permeability in the slope increase nonlinearly with time. Curves for maximum displacement with a strength reduction factor can be divided into three stages: the early stable stage, the midterm nonlinear growth stage (creeping state), and the later rapid growth stage (instability state). We also find that the rise of the water level promotes the erosion and migration of fine particles on the slope and that the maximum migrated fine particles volume fraction and the maximum porosity increase with the water level. The values of the strength reduction factor for the creeping state decrease as the water level rises. Furthermore, the larger the size of the downstream leakage outlet, the larger the maximum migrated fine particles volume fraction and maximum porosity. However, the relationship between maximum displacement and strength reduction factor is nearly unaffected by the size of the leakage outlet.

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Seepage Anomaly Detection via Fiber Optic Distributed Temperature Sensing: Insights from Physical and Numerical Modeling

Bekele,

Song,

Kim

et al. 2024

J. Geotech. Geoenviron. Eng.

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Detection of Permeability Defects Within Dams and Levees Through Coupled Seepage and Heat Transport Analyses

Cited by 3 publications

References 2 publications

Experimental Investigation of Levee Erosion during Overflow and Infiltration with Varied Hydraulic Conductivities of Levee and Foundation Properties in Saturated Conditions

Experimental Investigation of Levee Erosion during Overflow and Infiltration with Varied Hydraulic Conductivities of Levee and Foundation Properties in Saturated Conditions

A Numerical Analysis of the Leakage Characteristics of an Embankment Dam Slope With Internal Erosion

Seepage Anomaly Detection via Fiber Optic Distributed Temperature Sensing: Insights from Physical and Numerical Modeling

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