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Erschienen in:
2021 | OriginalPaper | Buchkapitel
Optimization of Buffer Layer Thickness Over Black Cotton Soil
verfasst von : M. Vinoth, P. S. Prasad
Erschienen in: Problematic Soils and Geoenvironmental Concerns
Verlag: Springer Singapore
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Abstract
Black cotton (BC) soils are inorganic clays of medium to high compressibility and form a major soil group in India. They are characterized by high shrinkage and swelling properties. Due to its peculiar characteristics, it forms a very poor foundation material for road construction. R&D efforts have been made to improve the strength characteristics of BC soil by many researchers. Soil replacement with buffer layer remains is a very common technique but still there is no reliable formula or technique is available to estimate the required replacement depth. Therefore, this paper intends to optimize the replacement thickness of buffer layer required to maintain the heave within the acceptable range and to evaluate efficacy and impact of placing a very thin layer of stabilized BC soil (BC soil + 3% lime) or cohesive non-swelling material (Murram/Murram + 3%Lime) or impermeable geomembrane between the buffer layer and BC soil using laboratory studies.