الفهرس 
REVIEW OF PREVIOUS STUDIESOnly 14 pages are availabe for public view
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Abstract
The behaviour of
containing a cavity
numerically.
shallow foundations
was investigated
resting on sand
experimentally and
Model tests were carried out on footings 80 mm * 400 mm and
having different thicknesses 2 mm, 3 mm, and 4 mm. The sand
medium was deposited in a steel tank 800 mm * 1200 mm and 620
mm in height .. The cavity within the medium was constructed at
several locations in the horizontal and vertical directions,
and had different sizes. Loading of the footings was performed
by applying equal loads at three points situated at equal
spans forming equal double cantilevers. Settlements and
strains were measured at six and eight poi,nts on the footinga
respectively.
The numerical analysis was made by using Ohde~s method in
case of homogeneous soil. In case of presence of cavity Ohde~s
method was modified by using the finite element technique.
Data used in the analysis, i.e. dimensions of footing, load,
size of cavity and modulus of elasticity of sand were those
used in the experimental investigations.
Results of the study indicated that, the presence of cavity
on behaviour of footing was significant -and depended gre~tly
on its location. Important results were obtained concerning
the presence of cavity and the resulting relative rigidity on
the settlements and bending moments in the footing.
Satisfactory agreement was obtained betw~en the exper~mental
and analytical results.