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Erschienen in:
2024 | OriginalPaper | Buchkapitel
Bearing Pressure of Foundation on Strong Layer Overlying Weak Clay Accounting for Compressibility
verfasst von : Joga Himavarsha, J. Y. V. Shiva Bhushan, Madhira R. Madhav
Erschienen in: Proceedings of the Indian Geotechnical Conference 2022 Volume 2
Verlag: Springer Nature Singapore
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Abstract
The present study analyzes response of a circular footing on two-layered clays. Several solutions are available for the ultimate bearing capacity of foundations on two-layered soil but none considers the compressibility of the layers. Strong and stiff layer of thickness, H, overlies a soft and weak clay with E1 > E2 and cu1 = 2.5cu2, where 1 and 2 correspond to top and bottom layers, respectively. Finite element axisymmetric analysis is carried out to evaluate the bearing pressure, q, versus settlement responses for ranges of stiffness ratio (RE = E1/E2) and different thicknesses of top layer. Variations of bearing pressure factors (Ncf = q/cu1) for circular footings of diameter, D, are obtained at different settlement ratios (SR), for a wide range of RE. Results are validated with the Merifield and Nguyen (Geomech Geoengin 1:151–162, 2006) for considered cases of layered clays with different H/D. Variation of Ncf with stiffness ratio, RE, for different SR and H/D ratios are presented and analyzed.