Internal Erosion Due to Water Flow Through Earth Dams and Earth Structures

Flores-Berrones, Raúl; López-Acosta, Norma Patricia

doi:10.5772/24615

Cited by 13 publications

(10 citation statements)

References 16 publications

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“…The erodibility of material is controlled by two factors, the strength of material, or its erosion resistance, and the flow regime of the eroding fluid, that is, sufficient seepage flow to overcome a critical shear strength between particles for erosion and transportation [7,[21][22][23][24]. The strength is correlated to the cementitious properties of replacement and curing period while the seepage flow is corresponding to the erosion time.…”

Section: Discussionmentioning

confidence: 99%

Investigation of Erosion of Cement-Bentonite via Piping

Wang

Zhao

Royal

2017

Advances in Materials Science and Engineering

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Cement-bentonite is one of the main materials used in the seepage barriers to protect earth dams and levees from water erosion. However, the current understanding of the erodibility of the cementitious materials and the interactions between cracked seepage barriers and the water flow is inadequate. Based on the laboratory pinhole erosion test, we first investigated the impacts of cementbentonite treatments by using the ground granulated blast-furnace slag (GGBS) as replacement on the erosion characteristics, compared with the original mixtures; the inclusion of GGBS highlighted a potential advantage against water erosion. In addition, we proposed to calculate the erosion percentage and establish the mathematical relationships between the erosion percentage and different regimes, that is, different curing period, erosion time, and sizes of initial holes. Results showed that enough curing period was critical to avoid the increases of hydraulic conductivity in the macrofabric of the barrier; meanwhile, the materials were eroded quickly at the beginning and slowed down with the erosion time, where the enlargement of the initial creaks would be stabilised at some point in time. Moreover, the sizes of initial holes may affect the erosion situation varying from the sample curing periods.

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Section: Discussionmentioning

confidence: 99%

Investigation of Erosion of Cement-Bentonite via Piping

Wang

Zhao

Royal

2017

Advances in Materials Science and Engineering

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“…On the other hand, piping, which is considered as one of the main factors that cause failure of earth structures all over the world, occurs due to the migration of small soil particles into the coarse materials. This phenomenon takes place through the dam or dike body, or under the structure foundation, [11], [12].…”

Section: Introductionmentioning

confidence: 99%

Investigation of seepage effect on river dike’s stability under steady state and transient conditions

Kuriqi¹,

Ardıçlıoğlu²,

Muceku³

2016

Pollack Periodica

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World experiences reveal that catastrophic floods are posing a serious threat that comes not only from them as extreme events but also as the result of adaptation measures uncertainty, (i.e. dikes). In particularly old dikes constructed earliest at the north part of Albania, during the last floods demonstrated the high uncertainty and weak spots. In this paper, the significance of the seepage investigation and stability analysis are discussed. As a case study, parts of new dikes constructed last years along the Buna River located in north part of Albania are investigated. Filling materials for these dikes are represented mostly from silt and clay. Finite element method is used to perform seepage analysis while general limit equilibrium method is used to perform slope stability analysis. Both, seepage and slope stability analyses are done for three different scenarios: steady state, rapid filling, and rapid drawdown. Finally, it is concluded that silt-clay material used in these dike structure is posing serious uncertainty during seepage phenomenon by threatening the stability of entire dike structure especially during the transient condition (rapid filling and drawdown).

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“…This corresponded to almost every April to summer season where the provided reservoir levels rapidly rise up and down due to precipitation and other seasonal effects. Such rapid filling and rapid drawdown can modify flow conditions inside a soil mass, thus causing uncontrolled saturation and seepage forces (Flores-Berrones and Patricia 2011).…”

Section: Applications and Resultsmentioning

confidence: 99%

Anomaly Detection on Piezometer Data Collected from Embankment Dams Using Physical Model-Based Simulation

Jung¹,

Bergés²,

Garrett³

2014

Computing in Civil and Building Engineering (2014)

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Embankment dams, like most other civil infrastructure systems, are exposed to harsh and largely unpredictable environments. However, unlike bridges, buildings and other structures, their design specifications and as-is properties are not generally known in the same level of detail due to, among other things, their age and the difficulties associated with assessing their internal structure. Hence, making sense of measurements collected from instruments used to monitor their behavior requires sound engineering judgment and analysis, as well as robust statistical analysis techniques to prevent misinterpretation. In the United States (US), the current practice of analyzing the structural integrity of embankment dams relies primarily on manual a posteriori analysis of instrument data by engineers, leaving much room for improvement through the application of automated data analysis techniques. In our previous work, we presented the effectiveness of applying statistical anomaly detection techniques such as Principal Component Analysis and Robust Regression Analysis when analyzing piezometer data collected from embankment dams. In this paper, we present how we could improve our work by testing with simulated anomalies that are indicative of internal erosion problems. In order to closely replicate more realistic anomalous scenarios, a physics-based model of an embankment dam was developed. By varying a hydraulic conductivity of a soil material in the model, corresponding detection accuracies and sensitivities of the statistical anomaly detection algorithm were evaluated. When we applied our proposed anomaly detection on more realistically simulated anomalous data using the numerical model, the detection accuracy came out to be 98.5%.

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Internal Erosion Due to Water Flow Through Earth Dams and Earth Structures

Cited by 13 publications

References 16 publications

Investigation of Erosion of Cement-Bentonite via Piping

Investigation of Erosion of Cement-Bentonite via Piping

Investigation of seepage effect on river dike’s stability under steady state and transient conditions

Anomaly Detection on Piezometer Data Collected from Embankment Dams Using Physical Model-Based Simulation

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