A Visual Basic program for analyzing oedometer test results and evaluating intergranular void ratio

Monkul, Mehmet Murat; Önal, Okan

doi:10.1016/j.cageo.2005.09.005

Cited by 20 publications

(6 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Equation (1) gives the intergranular void ratio defined by Monkul and Onal (2006). The concept of the intergranular void ratio suggests that the fines fill the voids formed between the sand grains and thus the behaviour of sand with moderate amount of fines should be governed by the intergranular void ratio instead of the global void ratio.…”

Section: Shear Loadingmentioning

confidence: 99%

Laboratory Study on the Hydraulic Conductivity and Pore Pressure of Sand-Silt Mixtures

Belkhatir

Arab

Della

et al. 2014

Marine Georesources & Geotechnology

View full text Add to dashboard Cite

The hydraulic conductivity plays a major role on the excess pore pressure generation during monotonic and cyclic loading of granular soils with fines. This paper aims to determine how much the hydraulic conductivity and pore pressure response of the sand-silt mixtures are affected by the percentage of fines and void ratio of the soil. The results of flexible wall permeameter and undrained monotonic triaxial tests performed on samples reconstituted from Chlef River sand with 0, 10, 20, 30, 40, and 50% nonplastic silt at an effective confining stress of 100 kPa and two relative densities (D r ¼ 20, and 91%) are presented and discussed. It was found that the pore pressure increases linearly with the increase of the fines content and logarithmically with the increase of the intergranular void ratio. The results obtained from this study reveal that the saturated hydraulic conductivity (k) of the sand mixed with 50% low plastic fines can be, on average, four orders of magnitude smaller than that of the clean sand. The results show also that the hydraulic conductivity decreases hyperbolically with the increase of the fines content and the intergranular void ratio.

show abstract

Section: Shear Loadingmentioning

confidence: 99%

Laboratory Study on the Hydraulic Conductivity and Pore Pressure of Sand-Silt Mixtures

Belkhatir

Arab

Della

et al. 2014

Marine Georesources & Geotechnology

View full text Add to dashboard Cite

show abstract

“…Thickness . In the one-dimensional consolidation test, the settlement due to consolidation of a certain layer of thickness because of a reduction in the void ratio from 0 to , in conjunction with an effective stress increase from 0 to 0 + , can be derived from the following expression [20,34]:…”

Section: Compacted Deformation In a Soil Layer Withmentioning

confidence: 99%

“…Δ 1 is the intergranular vertical pressure increase (also called the final vertical effective stress increase) because the overall dissipation of the initial excess pore water pressure Δ after primary consolidation is completed. This equation is only accurate for the one-dimensional consolidation test where there is no lateral yielding of the soil specimen and the ratio of the minor to major principal effective stresses, 0 , remains constant [34].…”

Section: Limits Of the Present Analytical Solution And Possiblementioning

confidence: 99%

Settlement Analysis of a Confined Sand Aquifer Overlain by a Clay Layer due to Single Well Pumping

Niu

Wang

Chen

et al. 2013

Mathematical Problems in Engineering

View full text Add to dashboard Cite

This paper proposes a simplified analytical solution to determine the primary consolidation settlement of a confined sand aquifer overlain by a clay layer due to single well dewatering. After single well pumping in a steady state, the Dupuit equation predicts the confined sand aquifer water head drawdown. The confining pressure on the underlain confined sand aquifer top surface is determined using the principle of vertical force equilibrium. Additional vertical stresses in each layer of the confined sand aquifer are then computed with the Boussinesq solution. The overall aquifer consolidation deformation is then determined with thee-lgpcurve from the one-dimensional consolidation test and the applied vertical stress with the integral method. The proposed analytical solution is validated using the ADINA software, where porous media are simulated with the Biot model and solved with the 3D finite element method. This proposed analytical solution is used to simulate the primary consolidation settlement due to well pumping, using the fourth confined aquifer in the Pudong New Area of Shanghai from 1980 to 1995 as a case study. The predicted settlement compares reasonably well with the actual measured settlement in Shanghai.

show abstract

“…where G s and G f are the specific gravity of coarser and finer grain matrix forming the soil, respectively, G is the specific gravity of the sand-silt mixture, F c is the fines content, and e is the gross void ratio. Equation 1gives the intergranular void ratio defined by Monkul and Onal (2006). The concept of the intergranular void ratio suggests that the fines fill the voids formed between the sand grains, and thus the behavior of sand with moderate amount of fines should be governed by the intergranular void ratio instead of the gross void ratio.…”

Section: Shear Loadingmentioning

confidence: 99%

Undrained Monotonic Pore Pressure Response of Saturated Silty Sand Soils

Belkhatir

Arab

Della

et al. 2012

Special Topics Rev Porous Media

View full text Add to dashboard Cite

The excess pore water pressure generated during earthquake shaking induces liquefaction and affects considerably the shear strength, shear stiffness, deformation, and settlement characteristics of soil deposits, and therefore the stability of the structures constructed from or founded on it. Published literature on the pore pressure generation characteristics and in turn the liquefaction resistance of sandy soils appears to be confusing. For the purpose of clarifying and evaluating the pore pressure generation characteristics of sandy soils, a series of undrained monotonic triaxial tests was carried out on different sand-silt mixture samples at various intergranular void ratios. The soil samples were tested under a constant confining pressure (σ 3 = 100 kPa) and two relative densities (D r = 20% and 91%). The results obtained from this study reveal that the fraction of low plastic fines plays an important role in the generation of the excess pore water pressure in Chlef sand-silt mixture samples. It was found that the excess water pressure increases linearly with the increase of the fines content and hyperbolically with the increase of the intergranular void ratio. The results show also that the gross void ratio parameter could not be used to represent the pore pressure response of the sand-silt mixtures and the excess pore pressure and the undrained shear strength at the peak can be correlated to the fines content up to 50%.

show abstract

A Visual Basic program for analyzing oedometer test results and evaluating intergranular void ratio

Cited by 20 publications

References 15 publications

Laboratory Study on the Hydraulic Conductivity and Pore Pressure of Sand-Silt Mixtures

Laboratory Study on the Hydraulic Conductivity and Pore Pressure of Sand-Silt Mixtures

Settlement Analysis of a Confined Sand Aquifer Overlain by a Clay Layer due to Single Well Pumping

Undrained Monotonic Pore Pressure Response of Saturated Silty Sand Soils

Contact Info

Product

Resources

About