Experimental Bench for Study of Internal Erosion in Cohesionless Soils

Marot, Didier; Sail, Yacine; Alexis, Alain

doi:10.1061/41147(392)40

Cited by 6 publications

(5 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Three seepage velocities of 0.086 cm/s (52 mm/min), 0.153 cm/s (92 mm/min) and 0.347 cm/s (208 mm/min) were applied to the top of the samples via a perforated top cap filled with glass beads to ensure that the flow was applied as uniformly as possible. Flow velocities and applied hydraulic gradients (Table 2) were comparable with previous studies (Marot et al, 2010;Chang and Zhang, 2012;Ke and Takahashi, 2015).…”

Section: R a F Tsupporting

confidence: 86%

Post-erosion mechanical response of internally unstable soil of varying size and flow regime

2021

View full text Add to dashboard Cite

One of the leading causes of dam failure is internal erosion. The impact of erosion of non-plastic fine particles, known as suffusion, on the soil structure and strength has been studied experimentally. However, influences including sample size have not been thoroughly investigated. Internally unstable gap-graded cohesionless soil samples with various sizes were investigated using an erosion-triaxial apparatus. Samples were subjected to downward inflows of different seepage velocities. The results indicated that the potential for clogging increased with an increase in specimen length, leading to less fine particle erosion. Internal erosion changed the mechanical soil behaviour even after the loss of fines equal to five percent of the overall sample volume. Eroded specimens with similar intergranular void ratios showed similar undrained post-erosion behaviour. However, the magnitude of the post-erosion initial undrained peak shear strength is a function of coarse particle interlocking, residual fine content and equivalent intergranular contact index. It was also found that the steady state line remained unchanged after erosion of fine particles and the mobilized friction angle at the steady state line is independent of the residual fine content.

show abstract

Section: R a F Tsupporting

confidence: 86%

Post-erosion mechanical response of internally unstable soil of varying size and flow regime

2021

View full text Add to dashboard Cite

show abstract

“…New model might be useful to estimate the settlement and strain of the soil body subjected to internal erosion by following the mass conservation law. The dynamic measurement of soil settlement and strain in the previous studies (Tomlinson and Vaid 2000;Marot et al 2010;Ouyang and Takahashi 2016;Sato and Kuwano 2018;Indiketiya et al 2019) was approximately observed to obey the equation [36]. This is because the deformation of soil body is attributed to the soil loss.…”

Section: Discussion On Application Of Newly Proposed Model In Predicting Erosion From Tests Conducted In Literaturementioning

confidence: 98%

A novel analytical model for determining erosion from hole erosion tests

Cai¹,

Bora²,

Pekkat³

et al. 2020

Preprint

View full text Add to dashboard Cite

Determination of erosion characteristics is of great significance to assess the stability of geotechnical infrastructures that are subjected to seepage. Hole erosion tests (HETs) are the popular and simple laboratory measurements that have been used to determine erosion characteristics. These tests are indicative of the quantity of soil loss in term of internal erosion that can occur during seepage. It is noted that there are not many studies that focus on the development of theoretical model describing the erosion process (i.e. sediment detachment and transport) in HETs. The aim of this study is to propose a theoretical model based on Bernoulli's principle to interpret the erosion measurements from HETs and employ the results for estimating erosion characteristics of soils. An analytical equation was deduced from a physically based model incorporating Bernoulli's principle and erosion constitutive law for internal erosion within a soil pipe driven by pressure gradient. The analytical equation could be applied to determine the temporal development of eroded soil loss, radial erosion propagation, erosion rate, hydraulic shear stress, and pressure drop. The utility of proposed analytical solution was validated using a series of HETs performed in this study. Based on the novel analytical solution, erosion characteristics could be derived from the known realistic propagation of radial erosion.

show abstract

“…The bench (Marot et al, 2010) is composed of an oedo-permeameter cell with a funnel-shaped draining system which is connected to a collecting system. The bench comprises also an axial loading system, a hydraulic control system and a gammadensitometric system.…”

Section: Figure 1 Principle Of the Eodo-permeametermentioning

confidence: 99%

Suffusion tests on cohesionless granular matter

Sail¹,

Marot²,

Sibille³

et al. 2011

European Journal of Environmental and Civil Engineering

View full text Add to dashboard Cite

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

show abstract

Experimental Bench for Study of Internal Erosion in Cohesionless Soils

Cited by 6 publications

References 7 publications

Post-erosion mechanical response of internally unstable soil of varying size and flow regime

Post-erosion mechanical response of internally unstable soil of varying size and flow regime

A novel analytical model for determining erosion from hole erosion tests

Suffusion tests on cohesionless granular matter

Contact Info

Product

Resources

About