Work

Effect of soil stiffness on end bearing resistance of foundations in clay from large deformation numerical modelling

Year: 2024

Type: article

Abstract: Accurately predicting the installation resistance is of great benefit to a rational and economical design of foundations. This research performs a large-deformation finite-element analysis to investigate the effect of soil stiffness on the end bearing resistance in uniform clay. Different types of geotechnical structures and foundations, e.g., cone penetrometer, strip foundation, bucket foundation, and deep piled foundation are considered. Results show that soil stiffness has a negligible impact during shallow penetration but becomes pronounced at deep penetration. It is found that for strip footings, effect of soil stiffness is minimal, whereas the end bearing resistances of CPT and deep piled foundation with a partial plug are highly dependent on the soil stiffness. For a rough pile foundation, the resistance factor N c,pf increases by approximately 30% as soil rigidity I r increases from 50 to 500. For a bucket foundation, the effect of soil stiffness on the end bearing resistance falls between that of “shallow” and “deep” foundations. Based on the numerical results, empirical expressions are proposed to predict the end bearing resistance factor accounting for the effect of soil stiffness.

Source: Computers and Geotechnics

DOI: 10.1016/j.compgeo.2024.106515

Authors: Shujin Zhou, Wangcheng Zhang, Ashraf S. Osman

Institution: Durham University

Language: English

Topic: Geotechnical Engineering and Soil Mechanics

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,580

Funders: Commonwealth Scholarship Commission, China Scholarship Council