Experimental Study on Shear Strength of Cohesive Soils Reinforced with Stone Columns

Aslani, Majid; Nazariafshar, Javad; Ganjian, Navid

doi:10.1007/s10706-018-0752-z

Cited by 13 publications

(3 citation statements)

References 19 publications

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“…Typically, clays are highly sensitive to variation in their water content Spoor and Godwin (1979), and are marked by lower shear strength (Aslani et al, 2019). This study observed that the kaolin has the lowest direct shear strength.…”

Section: Discussionmentioning

confidence: 63%

“…It was also noted that increasing the area replacement ratio from 7.9% to 17.5% considerably increased the undrained shear strength of kaolin reinforced with fully-penetrating non-encased sand columns. Aslani et al (2019) investigated the shear strength behaviour of clay reinforced with granular columns containing gravel (D50 = 0.52 mm) or stone (D50 = 4.2 mm). Using a large direct shear machine with an area of 305 mm x 305 mm and depth of 152.4 mm, tests were performed on geocomposites containing three different area replacement ratios (13.3%, 17.7% and 24%), different installation patterns (single, square and triangular) and different normal stresses (35 kPa, 55 kPa and 75 kPa).…”

Section: Literature Reviewmentioning

confidence: 99%

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Kaolin Clay Reinforced with a Granular Column Containing Crushed Waste Glass or Traditional Construction Sands

et al. 2022

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Installation of granular columns is a cost-effective and versatile in situ technique to improve the shear strength, settlement, and drainage behaviour of weak soils. It involves backfilling vertical boreholes in the ground with granular materials stiffer than the native soil, such as stone or compacted sand.However, the massive use and overexploitation of sand and natural aggregates have depleted their reserves in recent decades, causing damage to the environment, creating sand shortages and skyrocketing their price. Hence, it is essential to develop a sustainable alternative to natural aggregates to construct granular columns. The ever-increasing stockpiles of waste glass could be a potential replacement for natural sand in several geotechnical construction applications, noting that both materials have a similar chemical composition. Using crushed waste glass (CWG) as an alternative to traditional natural and manufactured (quarried) sands in granular columns could offer a multipronged benefit by recycling non-biodegradable waste (glass) and by conserving a depleting natural resource (sand). Using a large direct shear (LDS) machine, this study investigated the shear strength behaviour of kaolin (to represent a typical weak soil) reinforced with a central granular column. Three different materials were separately used to backfill the column, including natural sand (NS), manufactured sand (MS) and CWG. The results revealed that the geocomposites containing the CWG column have the highest peak friction angle and relatively greater shear strength under high normal stresses, favouring the potential use of CWG as a green alternative to traditional sands in backfilling granular columns, ultimately supporting resource conservation, waste recycling and the paradigm shift towards a circular economy.

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Section: Discussionmentioning

confidence: 63%

Section: Literature Reviewmentioning

confidence: 99%

Kaolin Clay Reinforced with a Granular Column Containing Crushed Waste Glass or Traditional Construction Sands

et al. 2022

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“…For example, the first phase of the Luoyang Urban Rail Transit Line 2 project under construction uses the shield method to cross the sandy gravel stratum, which is particularly important for the ground settlement, seepage damage, and the stability of the excavation surface [1][2][3]. In addition to a large number of field tests, the mechanical characteristics and description of the stress-strain relationship of coarse-grained soil are hot topics [4,5], which can provide necessary conditions for numerical calculations in practical engineering.…”

Section: Introductionmentioning

confidence: 99%

A Constitutive Model of Sandy Gravel Soil under Large-Sized Loading/Unloading Triaxial Tests

Zhang

Feng³

et al. 2021

Advances in Civil Engineering

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Based on large-scale triaxial tests of sandy gravel materials, the strength and deformation characteristics under loading/unloading conditions are analyzed. At the same time, the applicability of the hyperbolic constitutive model to sandy gravel is studied using experimental data. The results indicate that sandy gravel under low confining pressures (0.2 and 0.4 MPa) shows a weak softening trend; the higher the confining pressure, the more obvious the hardening tendency (0.6 and 0.8 MPa) and the greater the peak strength. During unloading tests, strain softening occurs, and the peak strength increases with increasing confining pressure. During loading tests, dilatancy appears when the confining pressure is low (0.2 MPa). With increasing confining pressure (0.4, 0.6, and 0.8 MPa), the dilatancy trend gradually weakens, and the cumulative volume tric strain increases, which reflects the relevance of the stress paths. Through research, it is found that the hyperbolic constitutive model has good applicability to sandy gravel soils, and the corresponding model parameters are obtained.

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Studying the effect of partial drainage on the response of soft clays reinforced with sand column groups

2022

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Experimental Study on Shear Strength of Cohesive Soils Reinforced with Stone Columns

Cited by 13 publications

References 19 publications

Kaolin Clay Reinforced with a Granular Column Containing Crushed Waste Glass or Traditional Construction Sands

Kaolin Clay Reinforced with a Granular Column Containing Crushed Waste Glass or Traditional Construction Sands

A Constitutive Model of Sandy Gravel Soil under Large-Sized Loading/Unloading Triaxial Tests

Studying the effect of partial drainage on the response of soft clays reinforced with sand column groups

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