Behavior of a Circular Footing resting on Sand Reinforced with Geogrid and Grid Anchors

Helis, Rima; Mansouri, Tarek; Abbèche, Khelifa

doi:10.48084/etasr.5607

Cited by 6 publications

(4 citation statements)

References 36 publications

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“…Komolafe et al [28] investigated the square and circular footings supporting on cohesionless soils from a structural, geotechnical and construction cost perspective. Helis et al [29] estimated the bearing capacity of a circular footing supported on sand using two reinforcing systems, the geogrid and the grid anchor.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modeling for the Optimal Cost Design of Circular Isolated Footings with Eccentric Column

Luévanos-Rojas,

Moreno-Landeros,

Santiago-Hurtado

et al. 2024

Mathematics

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This article shows a model for the design of circular isolated footings and the column placed anywhere in the footing under minimum cost criteria. Some designs for obtaining the diameter, effective depth, and steel areas of the footing under biaxial bending assume the maximum and uniform pressure at the bottom of the footing supported on elastic soils. All these works consider the column placed at the center of the footing. Three numerical problems are given (each problem presents four variants) to determine the lowest cost to design the circular footings under biaxial bending. Problem 1: Column without eccentricity. Problem 2: Column with eccentricity in the direction of the X axis of one quarter of the diameter of the footing. Problem 3: Column placed at the end furthest from the center of the footing on the X axis. The results are verified by the balance of moments, one-way shear or shear and two-way shear or punching. The new model shows a saving of 17.92% in the contact area with soil and of 31.15% in cost compared to the model proposed by other authors. In this way, the proposed minimum cost design model for circular footings will be of great help for the design when the column is placed on the center or edge of the footing.

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Section: Introductionmentioning

confidence: 99%

Mathematical Modeling for the Optimal Cost Design of Circular Isolated Footings with Eccentric Column

Luévanos-Rojas,

Moreno-Landeros,

Santiago-Hurtado

et al. 2024

Mathematics

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“…Traditional rehabilitation of embankments and cut slopes sometimes requires removing slide debris and replacing it with freedraining granular materials. An alternative restoration method uses geosynthetics (geotextiles or geogrids) as reinforcement to reduce stabilizing costs [4][5]. In past, the performance of a geotextile-reinforced slope and its causes of failure was assessed using centrifuge testing procedures [6].…”

Section: Introductionmentioning

confidence: 99%

A Detailed Study on the Analysis and Design of Geotextile Reinforced Earth Embankments

Kumar

Burman

Choudhary

2023

Eng. Technol. Appl. Sci. Res.

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The design of a steep reinforced slope with an adequate Factor Of Safety (FOS) is a classical geotechnical problem. While designing a reinforced soil slope, it is necessary to accurately determine the tensile force to be resisted by the reinforcement to achieve the target FOS value and the length of the geotextile reinforcement to be provided at the top and bottom of the embankment and perform all the required safety checks. This paper presents an MS Excel spreadsheet using Visual Basic Programming that can be used to perform all the analyses required to design geotextile reinforced soil slopes, considering static and seismic loading conditions. This spreadsheet is capable of searching many slip surfaces repeatedly using Bishop's simplified method to determine the maximum tensile force to be resisted by the reinforcement, its top and bottom lengths, and performs deep-seated failure analysis to identify slip surfaces beyond the reinforced zone. This paper reports the results of an illustrative example to highlight all the above-mentioned issues. The results were also compared with the design charts reported in previous studies. The proposed platform can successfully perform all the necessary analyses to design both homogenous and non-homogenous embankments with geotextile reinforcements.

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“…Sireesh et al [25]; El-Sawwaf and Nazir [26]; Demir et al [27]; Chakraborty and Kumar [20]; Tafreshi et al [28]; Sharma and Kumar [29]; Hosamo et al [30]; Ameer and A'amal [31]; Jawad et al [32]; Helis et al [33]). Boushehrian and Hataf [22] conducted experimental and numerical studies to examine the impact of the initial layer's depth of reinforcement, vertical spacing, and number of reinforcement layers on the bearing capacity of circular and ring footings.…”

mentioning

confidence: 99%

“…They concluded that the optimum diameter ratio is 0.25, and the optimum depth of the topmost reinforcement layer as well as the optimum vertical depth between layers are around 0.25 times of the footing diameter at which the maximum improvement in bearing capacity is achieved. Helis et al [33] used finite element analysis to investigate the bearing capacity of a circular footing on sand bed reinforced by two different reinforcement systems, geogrid and grid anchor. The optimum length of the reinforcement was determined to be 5 times of the footing diameter for both geogrid and grid anchor systems, and the optimal depth of the first…”

mentioning

confidence: 99%

Experimental Investigation of Bearing Capacity of Circular and Ring Footings on Geogrid-Reinforced Cohesionless Soils

Al-Sumaiday,

Khalaf,

Muhauwiss

2024

Civil and Environmental Engineering

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This experimental investigation describes an extensive series of reduced laboratory scale tests, conducted on circular and ring footing models rested on a geogrid reinforced cohesionless soil. The study examined the impact of several factors at different relative sand densities, such as the inner to the outer diameter ratio of the ring footing, the number of geogrid reinforcements, the depth of the initial reinforcement, and the vertical spacing between the geogrids, as well as the geogrid stiffness. The results indicated that the optimum diameter ratio of ring footings resting on loose or medium-dense cohesionless soil is 0.40 at which the maximum bearing capacity is reached, leading in a cost-effective design of the footings, while for the dense soil, a diameter ratio of 0.45 is the optimal ratio. Also, the results indicated that the optimum number of reinforcement layers which after the bearing capacity improvement can be considered negligible is three layers for the circular footing and four layers for the ring footing model. To achieve the maximum increase in bearing capacity, the study identifies optimal values for the depth of the first geogrid reinforcement layer and the vertical spacing between reinforcements, which apply to circular and ring footing. While the stiffness of the reinforcement has a significant effect on the bearing capacity, this effect is not proportional.

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Behavior of a Circular Footing resting on Sand Reinforced with Geogrid and Grid Anchors

Cited by 6 publications

References 36 publications

Mathematical Modeling for the Optimal Cost Design of Circular Isolated Footings with Eccentric Column

Mathematical Modeling for the Optimal Cost Design of Circular Isolated Footings with Eccentric Column

A Detailed Study on the Analysis and Design of Geotextile Reinforced Earth Embankments

Experimental Investigation of Bearing Capacity of Circular and Ring Footings on Geogrid-Reinforced Cohesionless Soils

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