Load carrying capacity of rectangular foundation on geogrid reinforced sloped sandy soil

Fattah, Mohammed Y.; Al-Haddad, Sinan A.; Hameedi, Mudhafar K.

doi:10.1088/1757-899x/737/1/012094

Cited by 12 publications

(4 citation statements)

References 10 publications

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“…Other studies also indicated that geogrid reinforcement improves the railway track by reducing the dynamic frequency response and settlement [46,47]. Fattah et al [48] also focused on investigating the stress distribution from railway track over geogrid reinforced ballast underlain by clay. ey found that the position of the geogrid had no significant effect on the transmitted stresses.…”

Section: Literature Reviewmentioning

confidence: 99%

Modeling Dynamic Frequency Response on Slab Track of Shinkansen Railway Based on Finite Element Method

Gholizadeh

Aghayan

Hadadi

2022

Advances in Civil Engineering

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The use of slab tracks in lieu of ballast tracks has introduced new dimensions in track dynamics in high-speed railways. To improve the performance of slab tracks under dynamic frequency responses caused by loads on the Shinkansen railway, the present study aimed to investigate the effect of mechanical properties of track components, including the elasticity modulus and thickness on the resonance frequency of the vertical dynamic responses using the finite element method. Such responses included receptance and decay rate in the asphalt bearing layer (ABL), hydraulically bonded layer (HBL), and concrete bearing layer (CBL). In addition, the study sought to select the optimal layer as an effective layer in the view of reducing the resonance frequency of dynamic responses in comparison with the general model. Based on the data regarding the effects of elasticity modulus and thickness of slab track layers on the resonance of the dynamic frequency responses under the amplitude loads, by changing the load from 20 to 25 tons over the slab track, the receptance under the modulus and thickness change increased up to 34 and 29%. Moreover, the decay rate under the modulus and thickness change increased up to 31 and 37%. Accordingly, by increasing the load amplitude, the CBL and HBL showed lower dynamic responses than other layers. Thus, CBL and HBL were selected as the optimum layers for improving the performance of the slab track of the Shinkansen railway.

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Section: Literature Reviewmentioning

confidence: 99%

Modeling Dynamic Frequency Response on Slab Track of Shinkansen Railway Based on Finite Element Method

Gholizadeh

Aghayan

Hadadi

2022

Advances in Civil Engineering

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“…This is consistent with Rymond, ( 2001) who noted a large improvement in the grid-reinforced composite system when the foundation soil was weak. Fattah et al (2020), from finite element analysis, found that at low speed (30 km/hr), about 100 % of the total settlement appeared in the clay layer. After this speed, the percentage in settlement levelled out at about 80 % at the clay layer and 20 % at the ballast layer.…”

Section: Test Proceduresmentioning

confidence: 99%

Settlement of Railway Track on Reinforced Ballast Overlain by Clayey

Fattah¹

2020

JTL

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Air transportation development is strictly related to airport competitiveness, since the airport management seeks to improve the capacity to produce services, increase passenger and aircraft movement, improve revenues from aeronautical and non-aeronautical activities, and optimise the other items related to the competitiveness of this type of organisation. In this sense, this study seeks to identify variables associated with the competitiveness of airports, based on their infrastructures, operations, and locations, which can influence the decision-making of airport managers continuously and efficiently. An analysis of the seven busiest Brazilian airports, in terms of aircraft and passenger movement, has been made, and multivariate data analysis has been used through a multiple regression, verifying the relationship between the variables of airports competitiveness, such as the total area of the airport site, number of aircraft parking positions, number of airlines, quantity of aircraft movementlandings and takeoffs, total number of passengers and the GDP of the city where the airport under study is located. The results present an index of competitiveness for each airport analysed after the data mathematical treatment, showing the coefficients at the general equations form aircraft and passenger movement.

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“…Sharma and Kumar [9][10][11] investigated the behavior of ring footings resting on fiber-reinforced and unreinforced sand when subjected to eccentric-inclined loading. Fatah et al [12] conducted an experimental study on a ring and circular footing on reinforced sand soil by geo-cell. The results of those studies show that the optimum value n for a ring footing is 0.4.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Bearing Capacity of a Ring Footing on Geogrid Reinforced Sand

2021

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A ring footing is found to be of practical importance in supporting symmetrical constructions for example silos, oil storage container etc. In the present paper, numerical analysis was carried out with explicit code FLAC3D 7.0 to investigate bearing capacity of a ring footing on geogrid reinforced sand. Effects of the ratio n of its inner/ outer diameter (Di / D) of a ring footing, an optimum depth to lay the geogrid layer were examined. It was found that an intersection zone was developed in soil under inner-side (aisle) of ring footing, contributing to its bearing capacity. Substantial increase of bearing capacities could be realized if ratio n of a ring footing was around 0.6. Numerical results also showed that, bearing capacity of a ring footing could increase significantly if a single-layer geogrid was laid at a proper depth under the footing. Similar contribution was found if a double-layer geogrid was implemented. However, such increases appeared to be rather limited if a triple-layer geogrid or a four-layer geogrid was used. A double-layer geogrid was recommended to increase the bearing capacity of a ring footing; the depth to lay this double-layer geogrid was also discussed.

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Load carrying capacity of rectangular foundation on geogrid reinforced sloped sandy soil

Cited by 12 publications

References 10 publications

Modeling Dynamic Frequency Response on Slab Track of Shinkansen Railway Based on Finite Element Method

Modeling Dynamic Frequency Response on Slab Track of Shinkansen Railway Based on Finite Element Method

Settlement of Railway Track on Reinforced Ballast Overlain by Clayey

Numerical Analysis of Bearing Capacity of a Ring Footing on Geogrid Reinforced Sand

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