Cohesion

Cohesion

Shear strength

Published in Yanrong Li, Jingui Zhao, Bin Li, Loess and Loess Geohazards in China, 2017

The cohesion and internal friction angle increase with the increase of loess dry density (Figs. 6.13 & 6.14). The greater the dry density, the closer the contact of loess particles, and the smaller the void ratio. This phenomenon is conductive for loess water surface tension to play a role, consequently increasing the cohesion. In addition, the interlocking effect, gravitation between particles, as well as the shear strength also increase.

Effect of vetiver root on triaxial shear strength of a cohesionless soil

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Journal Information

Published in Geomechanics and Geoengineering, 2021

Iram Lamiya Hoque, Mohammad Shariful Islam, Eqramul Hoque

Soil root interaction can be explained by various macro models or soil–vegetation interaction model. Various tests like direct shear test, double direct shear test, consolidated undrained tests have been adopted to determine the additive cohesion. But to determine the accurate impact on shear strength by roots, consolidated drained (CD) triaxial tests need to be done. Besides, the effect of root length and root content in soils for geotechnical aspects needs to be studied though the development of root structure is mostly due to genetic characters and partially due to environmental factors.

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Shear strength

Effect of vetiver root on triaxial shear strength of a cohesionless soil