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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/5048
Title: Stability of unsupported vertical circular excavations
Authors: Kumar J.
Chakraborty M.
Sahoo J.P.
Published in: Journal of Geotechnical and Geoenvironmental Engineering
Abstract: A methodology has been presented for determining the stability of unsupported vertical cylindrical excavations by using an axisymmetric upper bound limit analysis approach in conjunction with finite elements and linear optimization. For the purpose of excavation design, stability numbers (Sn) have been generated for both (1) cohesive-frictional soils and (2) pure cohesive soils, with an additional provision accounting for linearly increasing cohesion with increasing depth by means of a nondimensional factorm. The variation of Sn with H/b has been established for different values of m and ?, where H and b refer to the height and radius of the cylindrical excavation. A number of useful observations have been gathered about the variation of the stability number and nodal velocity patterns as H/b, ?, and m change. The results of the analysis compare quite well with the different solutions reported in the literature. ¬© 2014 American Society of Civil Engineers.
Citation: Journal of Geotechnical and Geoenvironmental Engineering(2014), 140(7): -
URI: https://doi.org/10.1061/(ASCE)GT.1943-5606.0001118
http://repository.iitr.ac.in/handle/123456789/5048
Issue Date: 2014
Publisher: American Society of Civil Engineers (ASCE)
Keywords: Clays
Failures
FEM
Limit analysis
Optimization
Plasticity
ISSN: 10900241
Author Scopus IDs: 7201861873
56261866100
55171499200
Author Affiliations: Kumar, J., Dept. of Civil Engineering, Indian Institute of Science, Bangalore, 560012, India
Chakraborty, M., Dept. of Civil Engineering, Indian Institute of Science, Bangalore, 560012, India
Sahoo, J.P., Dept. of Civil Engineering, Indian Institute of Science, Bangalore, 560012, India
Corresponding Author: Kumar, J.; Dept. of Civil Engineering, Indian Institute of ScienceIndia
Appears in Collections:Journal Publications [CE]

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