Effects of the Erosion and Transport of Fine Particles due to Seepage Flow

Sterpi, D.

doi:10.1061/(asce)1532-3641(2003)3:1(111)

Cited by 176 publications

(81 citation statements)

References 20 publications

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“…The amount of eroded particles in TS-6 surpasses that in TS-4 under the same erosion time, revealing that the enhancement of hydraulic gradients increases from 0.78 to 0.88 to some degree. The research carried out by Sterpi (2003) also supports this type of hydraulic gradient effect. Based on the research, a nonlinear incremental law was proposed to describe the relations between the amount of eroded fine particles and the erosion time.…”

Section: Effect Of Hydraulic Gradientsupporting

confidence: 53%

“…The quantity of accumulated eroded particles grows gradually and tends to be constant when the test time exceeds 450.0 min, which indicates the nonlinear relations between the erosion particles and the erosion time. Sterpi (2003) carried out a series of erosion tests and proposed an empirical law to describe the process of fine particle erosion. The law demonstrates the logarithmic relations between erosion quantity and erosion time, which is well coincident with the results shown in Fig.…”

Section: Typical Results and Repeatabilitymentioning

confidence: 99%

“…Incremental law believes the amount of eroded fine particles increases smoothly with erosion time and tends to reach a stable value when most of the fine particles in the soil are eroded. The nonlinear incremental law proposed by Sterpi (2003) is…”

Section: Effect Of Hydraulic Gradientmentioning

confidence: 99%

“…However, the skeleton structure of soil remains stable, and then the volumetric deformation is resulted from the particles loss solely. In terms of the research of Sterpi (2003), some fine particles are inevitably left in the soil. But the quantity of eroded particles will increase with the increasing hydraulic gradient and erosion time.…”

Section: Figmentioning

confidence: 99%

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Constant Gradient Erosion Apparatus for Appraisal of Piping Behavior in Upward Seepage Flow

et al. 2017

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Seepage direction is crucial for understanding the critical state and development of piping erosion. A stress-controlled apparatus was designed to investigate the piping behavior of cohesionless soil under upward flow condition. The components of the new apparatus included a loading chamber, a vertical and confining loading system, an upstream water supply device, a soil-water separating system, and a water collecting system. The loading chamber provides space for a soil specimen setting and loading. The combination of a vertical and a confining loading system was designed to apply complex stresses to a soil specimen. Under the stresses, the specimen was then eroded by the gradually increasing hydraulic head supplied by the water supply system. The eroded particle and spilling water were collected and detected by the soil-water separating system and the water collecting system. A series of experiments were carried out using the new apparatus. Results demonstrated the repeatability experiments and usefulness of the apparatus. The new apparatus allowed us to investigate the piping behavior under different stress states and hydraulic gradients. With this new apparatus and experiments, we found that lower and high critical hydraulic gradients (CHGs) should be included as the criteria of piping development based on the relationship between the hydraulic gradient and the seepage response. In addition, the stress state on the CHG and the particle erosion rate played important roles in the piping development. The outer pressure on the specimen can retard the development of erosion. In contrast, the hydraulic gradient was found to be positively correlated to the erosion rate. Results also indicated that a specimen would collapse once the amount of eroded small particles exceeds the critical value of 46.5 % of the soil.

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Section: Effect Of Hydraulic Gradientsupporting

confidence: 53%

Section: Typical Results and Repeatabilitymentioning

confidence: 99%

Section: Effect Of Hydraulic Gradientmentioning

confidence: 99%

Section: Figmentioning

confidence: 99%

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Constant Gradient Erosion Apparatus for Appraisal of Piping Behavior in Upward Seepage Flow

et al. 2017

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“…This erosion would leads to a volume reduction simultaneously with the increase in a void ratio. Furthermore, a severe surface subsidence and stability problem in these soil structure might be caused (Sterpi, 2003, Cividini, et al 2009, Uzuoka, et al, 2012. So, it is essential to understand the mechanical property of the soil with fines removal.…”

Section: Introductionmentioning

confidence: 99%

Mechanical behaviour of DEM crushable grains with fines removal

Nakata

Kato

2016

JGS Special Publication

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In order to understand the fundamental behaviour of crushable materials with fines removal in wide stress range, a numerical investigation was conducted. The investigation was carried out using DEM crushable materials because of representation of crushing phenomena. Firstly the volume percentage and microscopic stress of smallest grains regarded as fines were discussed during K0 compression. Then the mechanical behaviour were examined on the void ratio variation and the evolution of particle size of the material during K0 and plane strain compressions after fines removal. The effects of removal was dependent on the stress level. For higher stress level, a reproduction of smaller grains and the corresponding grading change were found out during K0 compression and PSC after the removal. Then the materials indicated same compression and critical state conditions to original material.

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Internal erosion in granular media: direct numerical simulations and energy interpretation

Sibille

Lominé

Poullain

et al. 2014

Hydrological Processes

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Internal erosion in soils is characterized by a first step of detachment of solid particles from the granular skeleton under the action of a water seepage; then the detached particles are transported with the water flow. For some erosion processes, as suffusion, transported particles may finally be redeposited within the interstitial space of the soil itself acting as a filter. This paper focuses on the analysis and the description of the two first steps of particle detachment and transport in the cases of erosion by suffusion and piping erosion. The analysis is mainly based on direct numerical simulations performed with a fully coupled discrete element-lattice Boltzmann method (DE-LB method). Inter-particle interactions occurring in the solid granular phase are described with the discrete element method, whereas dynamics of the water flow is solved with the lattice Boltzmann method. Simulation results show that internal erosion of the solid phase can be described either from the hydraulic shear stress or from the power expended by the water seepage.The latter description based on the flow power is finally compared with experimental results from laboratory tests.

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Effects of the Erosion and Transport of Fine Particles due to Seepage Flow

Cited by 176 publications

References 20 publications

Constant Gradient Erosion Apparatus for Appraisal of Piping Behavior in Upward Seepage Flow

Constant Gradient Erosion Apparatus for Appraisal of Piping Behavior in Upward Seepage Flow

Mechanical behaviour of DEM crushable grains with fines removal

Internal erosion in granular media: direct numerical simulations and energy interpretation

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