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Strength property and interaction mechanism of sand reinforced with hemispherical inclusions
Received date: 2015-04-22
Online published: 2016-10-31
A series of triaxial tests were carried out to study strength property of sand reinforced by hemispherical inclusions of rubber. The behavior of reinforced sand was studied in terms of shear strength of sand, stress-strain relation and the failure modes of specimen. Influences of confining pressures, number of hemispheres and number of reinforced layers on reinforced sand strength were discussed. The interaction mechanism between the hemispherical rubber and sand were also discussed. It was shown that shear strength is improved significantly under lower confining pressures. In addition, the reinforcing effect of hemispherical inclusions was increased with the number of reinforced layers increasing. Compared with sand reinforced with horizontal inclusions, the soil reinforced with hemispherical inclusions was bound more strongly, shear strength of reinforced soil was more improved, and the cohesion and friction angle of reinforced sand were improved more significantly with the number of hemisphere increasing.
Key words： reinforcement; stress-strain; triaxial test; hemispherical inclusion; strength
YANG Lei1, ZHANG Mengxi1, PENG Jimin2, SUN Zhou1, GAO Ang1 . Strength property and interaction mechanism of sand reinforced with hemispherical inclusions[J]. Journal of Shanghai University, 2016 , 22(5) : 656 -664 . DOI: 10.3969/j.issn.1007-2861.2015.02.019
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