Bearing Capacity of Two Closely Spaced Strip Footings on Geogrid Reinforced Sand
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Abstract
The finite element method is used to investigate the ultimate bearing capacity
of two closely spaced strip footings on geogrid reinforced sand. The effect of variation of
several parameters on the bearing capacity had been studied (number of reinforcement layers,
optimum depth of the first and last layers of reinforcement). In this study the main results show
that, the bearing capacity of the soil increases, and settlement decrease as with the number of
reinforcement layers. The optimum depth of the first layer of reinforcement ranged between
(0.375-1)B, while optimum depth of the last layer of reinforcement varies between (1.125-
2.25)B depending on the angle of internal friction. The optimum number of reinforcement
layers is ranged between (4-6) depending on the center to center spacing between the interfering
footings and the angle of internal friction.
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