International Journal of Mining and Geo-Engineering

International Journal of Mining and Geo-Engineering

Performance of T-shaped skirted footings resting on sand

Document Type : Research Paper

Authors
Tammineni Gnananandarao 1
Kennedy Chibuzor Onyelowe 2
Vishwas Nandkishor Khatri 3
Rakesh Kumar Dutta 4
1 Department of civil engineering, Aditya College Engineering & Technology, India
2 Department of Civil Engineering, Michael Okpara University of Agric., Umudike, Nigeria
3 Department of Civil Engineering, Indian Institute of Technology, Dhanbad, India
4 Department of Civil Engineering, National Institute of technology, India
10.22059/ijmge.2022.340418.594955
Abstract
A series of plate load tests were performed on a model T-shaped skirted footing by varying the normalized skirt depth and relative density of sand from 0.25 to 1.5 and 30 % to 60 %, respectively. The findings revealed that, regardless of the roughness condition, the observed peak in the pressure settlement ratio corresponding to relative densities of 30%, 40%, 50%, and 60% gradually vanished as the normalized skirt depth was increased from 0.25 to 1.5. The results further revealed that at a given pressure, a lesser settlement ratio was observed for a skirted footing than the footing without a skirt. The most significant benefit of providing a skirt to the footing was obtained when the base and skirt were partially rough and the relative density of sand was kept at 30%. In all the cases, the observed bearing capacity ratio for the present skirted footing was higher than the H-shaped skirted footing reported in the literature. Finally, an empirical equation was proposed to predict the bearing capacity ratio and settlement reduction factor for a given skirt depth and sand relative density.
Keywords
Bearing capacity ratio
Settlement reduction factor
Relative density
Roughness
Multivariable regression
Subjects
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International Journal of Mining and Geo-Engineering
Volume 57, Issue 1
Winter 2023
Pages 65-71