Abstract
Reactivated landslides are generally associated with residual shear strength. Residual shear strength mobilized in such landslides are important parameters in slope stability and landslide simulation analysis. The present study involves estimation of residual shear strength of landslide reactivated soil at Marappalam area of Nilgiris district, Tamil Nadu state, India where landslides being reactivated frequently due to rainfall infiltration. A series of torsional ring shear tests performed under different normal loads to study the shear behaviour and estimate the residual shear strength parameters of soil. Since the residual soil at Marappalam area formed due to weathering, an effort made to study the weathering effects along with clay fractions and clay minerals on residual shear strength of soil. The test conducted on soil samples collected from various depths which is having different clay fractions with varying plasticity characteristics and fines content. The mineralogical and micro fabric analysis shows the presence of kaolinite clay mineral formed due to weathering. As the depth increases, the gradation of soil increases that decreases the clay content and degree of weathering. Hence, it is observed that the residual shear strength of the soil decreases with increase in clay content in presence of kaolinite clay mineral.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsReferences
ASTM, D 6467: Standard Test Method for Torsional Ring Shear Test to Determine Drained Residual Shear Strength of Cohesive Soils, West Conshohocken, PA (2013)
Chandrasekaran, S.S., Sayed Owaise, R., Ashwin, S., Jain, R.M., Prasanth, S., Venugopalan, R.B.: Investigation on infrastructural damages by rainfall-induced landslides during November 2009 in Nilgiris India. Nat. Hazards 65(3), 1535–1557 (2013)
Little, A.L.: The engineering classification of residual soils. In: Seventh International Conference on Soil Mechanics and Foundation Engineering, pp. 1–10. ISSMFE, Mexico (1969)
Senthilkumar, V., Chandrasekaran, S.S., Maji, V.B.: Geotechnical characterization and analysis of rainfall-induced 2009 landslide at Marappalam area of Nilgiris district, Tamil Nadu, India. Landslides 14, 1803–1814 (2017)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 Springer Nature Switzerland AG
About this paper
Cite this paper
Senthilkumar, V., Chandrasekaran, S.S. (2018). Evaluation of Residual Shear Strength of Landslide Reactivated Soil. In: Wu, W., Yu, HS. (eds) Proceedings of China-Europe Conference on Geotechnical Engineering. Springer Series in Geomechanics and Geoengineering. Springer, Cham. https://doi.org/10.1007/978-3-319-97115-5_136
Download citation
DOI: https://doi.org/10.1007/978-3-319-97115-5_136
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-97114-8
Online ISBN: 978-3-319-97115-5
eBook Packages: EngineeringEngineering (R0)