Numerical modeling of rigid strip shallow foundations overlaying geosythetics-reinforced loose fine sand deposits

El-Soud, Sameh Abu; Belal, Adel M.

doi:10.1007/s12517-019-4436-7

Cited by 9 publications

(6 citation statements)

References 24 publications

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“…This result is similar to the small scale model [48]. Therefore, it is possible to say that in order to obtain high-resistance in the reinforced soil system, it is preferable to use an equal length of geogrid 7 times of the strip footing width that gives the greatest effect of the geogrid reinforcement [48]. The same results that obtained from [45,46,48].…”

Section: Effect Of the Length Of Reinforcementsupporting

confidence: 75%

“…After this value, the coefficient of enhancement gradually decreases to a constant value that is obtained for the reinforcement length equal to 9 times the footing width [9][10][11][12][13][14][15][16][17][18][19][20]. This result is similar to the small scale model [48]. Therefore, it is possible to say that in order to obtain high-resistance in the reinforced soil system, it is preferable to use an equal length of geogrid 7 times of the strip footing width that gives the greatest effect of the geogrid reinforcement [48].…”

Section: Effect Of the Length Of Reinforcementsupporting

confidence: 66%

“…These consequences are similar with the previous researches in the literature review. The BCR increments by increasing the width footing and length of the geogrid [48]. The percentage difference in the value of the coefficient of improvement between the large and small scale reaches to 25%.…”

Section: Effect Of Reinforcement Spacingmentioning

confidence: 95%

“…That means placing the double geogrid layer over the fine-grained sand contains the most effect on the reaction modulus for the ratio of geogrid length to footing width is 5, but the least effective for L/B = 3 [47,50]. Consequently, the greatest soil reaction modulus was found in all set of the series, which the optimum values were u/B = 0.3 and h/B = 0.4 for relative footing settlement of 10% [48]. Experimental results in Fig.…”

Section: The Impact Of Footing Width On the Reaction Modulus Of Reinfmentioning

confidence: 97%

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Scale effect study on the modulus of subgrade reaction of geogrid-reinforced soil

2020

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Both experimental and numerical investigations conducted on strip footing laying down over the geogrid reinforced fine sand bed. Firstly, an evaluation of the significance of geogrid reinforcement to enhance the soil's strength is required to carry out a series of a small-scale model of reinforced and unreinforced soil beneath static loading. Next, the series of the large-scale numerical analyses were implemented to define the soil bed reaction modulus and bearing capacity ratio of reinforced sand soil in plane strain conditions. The Mohr-Coulomb soil constitutive model was used to represent the fine sandy soil and the linear elastic tension model was utilized for modeled geogrid reinforcement elements. One of the most beneficial outcomes in the unreinforced soil case, the ultimate bearing capacity progress occurs by developing the width of the strip footing. Then in reinforcing case, an uppermost geogrid layer's depth under the footing and the fittest spacing between the reinforcing layers are not affected by the wide ranges of the footing widths. Their optimum values are similar to the works of literature (u/B = 0.3 and h/B = 0.4), but they are affected by soil friction angles. Finally, the achievement of this study indicates that the coefficient of soil reaction is associated with a nonlinear behavior with the relative ratio of tensile stiffness of the geogrid to the elasticity modulus of soil and enhanced by increased the number of geogrid layers. The influence of geogrid length on subgrade modulus is negligible and only the effective depth is affected it. The value of reaction modulus decreases when both the footing width and settlement increase. A simple new method is proposed to determine an approximate value of subgrade reaction modulus in reinforced soils.

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Section: Effect Of the Length Of Reinforcementsupporting

confidence: 75%

Section: Effect Of the Length Of Reinforcementsupporting

confidence: 66%

Section: Effect Of Reinforcement Spacingmentioning

confidence: 95%

Section: The Impact Of Footing Width On the Reaction Modulus Of Reinfmentioning

confidence: 97%

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Scale effect study on the modulus of subgrade reaction of geogrid-reinforced soil

2020

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“…Similarly, Abu El-Soud and Belal (2019) [37] find it possible to increase their bearing capacity and reduce settlements of sand dune if geogrid reinforcement is placed at the right position within the sand dune. It takes roughly 0.25B of geogrid burial, 0.75B of vertical geogrid spacing, and 7.5B of geogrid length under the strip footing to mobilize the full bearing capacity of sand-geogrid composite.…”

Section: Description Of Applicationmentioning

confidence: 99%

Improving bearing capacity of weak soils: A review

Saleh

2021

j. of constr. res.

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Weak soils, such as soft clay and loose sand, have a poor bearing capacity, making them incapable of bearing the load of superstructures that will be imposed on them. As a result, engineers must have a solution to the issue of poor bearing capacity in weak soils before embanking into building on them. This paper reviewed the use of stone columns, piled rafts, and geogrids for improving the bearing capability of weak soils. Important findings from recent research are also discussed. From the review of the previous researcher’s findings, it was found that modelling approaches such as physical modelling (full scale, centrifuge, laboratory scale) and numerical modelling are used to study bearing capacity improvement.

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