Design of Earth Dams Allowing Temporary Overtopping Based on Hydraulic Failure Experiments and Flood Analysis

Matsushima, Kenichi; Mohri, Yoshiyuki; Yamazaki, Shinji; Hori, Toshikazu; Ariyoshi, Mitsuru; Tatsuoka, Fumio

doi:10.1007/978-3-540-69313-0_137

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…This method is also known as the protection of bank slope stability construction technology of slurry [21]. Geotextile bags, as a type of building material, are widely used in embankment projects [22][23][24], which can prevent water erosion on the dam and bank slope [25]. In addition, the geotextile bag has a multitude of applications in foundation treatment [26,27].…”

Section: Introductionmentioning

confidence: 99%

An Experimental and Theoretical Study on the Tailings Dam with Geotextile Bags

2023

Sustainability

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The friction performance and compression properties of geotextile bags under different degrees of consolidation are researched through the slope sliding test, direct shear test, and unconfined compression test in this study. The geotextile bags are made up of geotextile and tailings sands obtained from a construction site of a prototype tailings dam in Yunnan Province. The slope sliding test is considered as an easy method to study the friction performance of geotextile bags with different degrees of consolidation. Through the test, the friction coefficients between the bags were obtained. Given the geotextile bags can withstand the vertical load in practical engineering, the direct shear test is also proposed and conducted. The ultimate bearing capacity of the geotextile bags with different consolidation degrees is studied in the unconfined compression test. The test reveals that the ultimate bearing capacity of geotextile bags, although featured with different moisture contents before the test, stays the same under the condition of slow loading. Finally, a stability analysis method based on the limit equilibrium theory is developed to simulate the stability of the tailings dam using geotextile bags (TDGB). According to the test results, the TDGB has demonstrated an improved stability compared with the general tailings dam.

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Section: Introductionmentioning

confidence: 99%

An Experimental and Theoretical Study on the Tailings Dam with Geotextile Bags

2023

Sustainability

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“…Dam risk assessment can be utilized in various scales, from different perspectives, and also subjected to multiple hazards [14]. One may focus on macro-scale studies such as dam portfolio in a region [15], or perform a series of advanced numerical simulations [16][17][18], experimental tests [19,20], or field investigations on a particular dam. This paper attempts to investigate the capabilities of instrumentation in controlling the design and quality of an earth dam construction.…”

Section: Introductionmentioning

confidence: 99%

Instrumented Health Monitoring of an Earth Dam

et al. 2020

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This work evaluates the stability of the Boostan earth dam by investigating its long-term performance and interpreting the measured data. To measure the dam response, several sensitive locations are instrumented. This process includes measuring various quantities such as pore water pressure, water level, and internal stress ratios using inspection devices such as ordinary and Casagrande piezometers, and total pressure cells. The recorded data shows that the pore pressure is in good agreement with the initial (stable) design condition. The installed piezometers show that the drainage is efficient, and the water table in the body is adequate. The instrument also shows a reasonable horizontal stress in the dam body. Overall, the condition of the case study dam is assessed to be normal. The results of this case report can be used as a guide in similar dams for instrumented health monitoring.

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“…Schuttrumpf [7] used theoretical and experimental methods to study the effect of the flow velocity of the dike and the thickness of the protective layer on dam damage. Matsushima [8] adopted a combination of geosynthetics to improve the impact resistance of dams, after crossing the embankment. Bomers [9] established a hydrodynamic-erosion model to study the erosion of asphalt slopes under the dike.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Debonding Failure Model of Anchored Polyurea Coating under a High-Velocity Water Flow and Its Application

Zhang

Wang

et al. 2019

Sustainability

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The debonding failure of a polymer-based coating seriously affects the safe operation of buildings under the action of a high-velocity flood discharge flow. In order to achieve a healthy and sustainable operation of hydropower stations, the debonding failure between polyurea coating and concrete was described by the cohesive zone model, and a debonding failure model was proposed and verified. The results obtained from the model were basically consistent with the test results. Accordingly, the influence of the performance of different anchoring types, the material mechanics of polyurea-based coating and the bonding on debonding behavior were analyzed, and engineering application research was also carried out. The impact resistances of polyurea-based coating under different anchoring conditions are obtained, which provide a reference for the anti-shock and wear-resistant design of flood discharge infrastructure. The elastic modulus and Poisson’s ratio of the polyurea-based material have a significant influence on the impact resistance of polyurea-based coatings. When the elastic modulus and Poisson’s ratio of a polyurea-based material are 25 MPa and 0.45, respectively, the impact resistance is optimal. The greater the fracture energy of the bonding material, the better the impact resistance. The engineering application results show that the seepage prevention and anti-wear characteristics of flood discharge infrastructure all meet the engineering requirements.

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Design of Earth Dams Allowing Temporary Overtopping Based on Hydraulic Failure Experiments and Flood Analysis

Cited by 3 publications

References 2 publications

An Experimental and Theoretical Study on the Tailings Dam with Geotextile Bags

An Experimental and Theoretical Study on the Tailings Dam with Geotextile Bags

Instrumented Health Monitoring of an Earth Dam

Investigation on the Debonding Failure Model of Anchored Polyurea Coating under a High-Velocity Water Flow and Its Application

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