Stability of an unsupported vertical circular excavation in clays under undrained condition

✍ Scribed by Vishwas N. Khatri; Jyant Kumar

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 588 KB
• Volume: 37
• Category: Article
• ISSN: 0266-352X
• DOI: 10.1016/j.compgeo.2009.11.001

✦ Synopsis

By using the axisymmetric finite elements static limit analysis formulation, proposed recently by the authors, the stability numbers (cH/c o ) for an unsupported vertical circular excavation in clays, whose cohesion increases with depth, have been determined under undrained condition; c = unit weight, H = height of the excavation and c o = cohesion along ground surface. The results are obtained for various values of H/b and m; where b = the radius of the excavation and m = a non-dimensional parameter which accounts for the rate of the increase of cohesion with depth. The values of the stability numbers increase continuously both with increases in H/b and m. The results obtained in this study compare well with those available in literature.