DBPapers
DOI: 10.5593/sgem2012/s02.v2036

STUDY REGARDING THE BEARING CAPACITY OF TRUNCATED CONE AND HEMISPHERICAL FOUNDATIONS REALIZED IN PUNCHED HOLES

M. MIREA, C. O. VOICU
Wednesday 1 August 2012 by Libadmin2012

References: 12th International Multidisciplinary Scientific GeoConference, www.sgem.org, SGEM2012 Conference Proceedings/ ISSN 1314-2704, June 17-23, 2012, Vol. 2, 275 - 282 pp

ABSTRACT

The research aimed at determining the bearing capacity (using FEM) of certain
foundation systems with different shapes placed in a cohesive or non-cohesive soil,
subjected to different loading steps and the comparative analysis of the obtained results.
The foundation systems studied consist of foundations realized as special-shape
prefabricated elements, placed in: dug up holes (the hole was realized by removing the
earth by digging), punched holes without a bulb (the hole was realized by stuffing the
earth vertically and sideways with the help of a hammer shaped in the foundation soffit)
and punched holes with bulb.
The considered foundation ground was assimilated to a 8 m radius and 8 m height
cylinder. The behavior pattern of the ensemble foundation-foundation ground was
realized by using the calculation modulus MCNL (solving the structure calculation
considering an elastic behavior continued with a perfectly plastic behavior of materials),
the chosen calculation type corresponding to the hypothesis of the symmetrical axis
deformation.
As a result, we can notice that the results obtained emphasized a better behavior for the
hemispherical element as compared to the truncated cone element, fact due to a more
favorable distribution of the stresses in the foundation soil.

Keywords: bearing capacity, foundations, punched holes, FEM, prefabricated, shape.