Laboratory assessment of shear strength parameters in sandy soil by lime permeation method and sensitivity analysis from Doi Chang case study

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Publication Title
Laboratory assessment of shear strength parameters in sandy soil by lime permeation method and sensitivity analysis from Doi Chang case study

Abstract
In nature, slopy terrain or loosely compacted soil can have high permeability which can cause rise in groundwater table and may create stability problems. To minimize this phenomenon, hydrated lime slurry permeation can be used. Hydrated lime has been in use for many years. But using lime slurry to treat low shear strength soil can be a solution for slope stability. The purpose of this research is to increase the sand’s shear strength by hydrated lime permeation under the influence of constant head. The test samples were obtained by passing through sieve #40 and retained on #200. After 66 days of lime permeation, permeability decreased by 94% and cohesion increased up to 77%. Also, to identify the mineral compounds and analyze the structure of crystalline materials, X-ray Diffraction Method (XRD) was used which showed formation of calcium cations along with the sand silica. The Sensitivity Analysis from Doi Chang mass movement case study (a village in Thailand having active mass movement currently) showed that the increase in cohesion help in the increase in factor of safety by 11.2% even though groundwater level was higher.
Authors
A. Koirala; S. Soralump

Published In

18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)

Theme

B - Geohazards

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