Bearing capacity of a strip foundation on a sand layer overlying a smooth rigid stratum |
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| Authors: | K Z Andrawes R R Al-Omari W M Kirkpatrick |
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| Institution: | (1) Department of Civil Engineering, University of Strathclyde, John Anderson Building, 107 Rottenrow, G4 0NG Glasgow, Scotland, UK |
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| Abstract: | The effect of a smooth rigid stratum, located beneath a dense sand layer, on the bearing capacity and settlement of surface and shallow strip footings is investigated using an advanced experimental model. A theoretical analysis is presented for the bearing capacity of surface footings. The results indicate that the bearing capacity reaches a minimum value at a specific sand-layer thickness. Any increase in the layer thickness above this value causes an increase in the bearing capacity up to that corresponding to a continuous media.Notation
H=
thickness of the sand layer
-
B=
foundation width
-
N
q and N
 =
bearing capacity factors for a semi-infinite layer
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N
qs and N
s=
bearing capacity factors for a finite layer
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H
o
/B=
limiting depth
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D
r=
relative density
-  =
angle of soil internal friction
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M=
model width
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D=
depth of surcharge
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q=
bearing stress, pressure applied on the footing
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q
u=
bearing capacity
- =
unit weight of sand |
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| Keywords: | Bearing capacity bearing capacity factors sand layered soil rigid stratum laboratory testing |
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