Stress Distribution below a Continuous Footing on Geotextile-Reinforced Soil

Çiçek, Elif; Güler, Erol; Yetimoğlu, Temel

doi:10.1061/(asce)gm.1943-5622.0001095

Cited by 17 publications

(8 citation statements)

References 23 publications

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“…The vertical stresses that are not transferred to the deeper layers may be due to the geogrid stiffness and length [57]. The reinforcements with a length greater than the footing width can bear the additional development of stresses, thereby preventing the stresses at deeper layers.…”

Section: 1mentioning

confidence: 99%

“…As mentioned before, the length of the reinforcement has to get the tensile strength mobilised; a part of it must act as the anchorage for providing a pull-out resistance [56]. Therefore, if improving the deeper layers, it can be proposed that reinforcements of optimum width must be placed in several layers within the critical depth of the footing or the shear zone depth below the footing [57]. So, the length and placement depth of the reinforcement play a significant role in the composite foundation.…”

Section: 1mentioning

confidence: 99%

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Comparative Study on the Reinforced Sand-Bed and the Stone Column in Improving the Clay Deposit Supporting Isolated Footing

Krishnamurthy,

Maniam Rajan

2024

Advances in Civil Engineering

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The working mechanism of a geotechnical structure can be understood from the deformations and the vertical stresses in the soil media. This article attempts to study the deformation, vertical stress development, and distribution of improved clay deposits carrying a single isolated footing. Through PLAXIS 3D software, numerical analyses were conducted for the ground improvement methods, such as the geogrid reinforced sand-bed (GRSB) and ordinary and geogrid encased stone column installation (OSC and GESC). In GRSB, the results show that the stresses were maximum at the sand–clay interface at a depth of 0.67 B (B—footing width). It is proposed to place an additional layer of geogrid at the interface, and it must be within the critical depth, i.e., the width of the footing. Furthermore, for the current study, the stiffness of the geogrid in the sand layer greater than 500 kN/m was insignificant in soil improvement, whereas the optimum axial stiffness of the stone column encasement was 1,000 kN/m based on the stress concentration factor. The stone column installation improved the clay layer even below the depth of 0.67 B, improving the capacity of clay to carry higher vertical stresses on par with the stone columns. The GRSB carried higher vertical stresses than the unimproved ground. However, the OSC and GESC could carry vertical stresses higher than the GRSB. This knowledge can allow the practitioners to decide the depth of placement of the reinforcement and also to choose an alternate if one method is not feasible for the site.

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Section: 1mentioning

confidence: 99%

Section: 1mentioning

confidence: 99%

Comparative Study on the Reinforced Sand-Bed and the Stone Column in Improving the Clay Deposit Supporting Isolated Footing

Krishnamurthy,

Maniam Rajan

2024

Advances in Civil Engineering

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“…A number of investigators [21,22] remarked that geocell confinement in soil induces apparent cohesion, whereas the reinforcement depth is replaced by an equivalent layer, with homogenous properties [33]. The induced cohesion in the soil is related to the increase in the confining pressure on the soil due to the geocell reinforcement, which is calculated through the following equation:…”

Section: Parametric Calculations Of Reinforced Soil Propertiesmentioning

confidence: 99%

“…Less and more amounts of sand make the domination role for clay cohesion or friction between the sand particles in determining the shear strength of the mixture, respectively [19]. Numerical simulations demonstrated that the best redistribution of the load is achieved if reinforcements are placed up to a certain depth depending on the loading width [20][21][22]. Through experiments and numerical simulations, it was showed that confinement through geocell effectively increases the stiffness and strength of the ballast and decreases vertical settlement and lateral dispersion [11,23].…”

Section: Introductionmentioning

confidence: 99%

The effect of geocell dimensions and layout on the strength properties of reinforced soil

Kouchaksaraei

Khalkhali

2020

SN Appl. Sci.

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Selecting suitable materials with acceptable shear strength characteristics may be the easiest and most economical way to obtain the maximum shear strength, if possible. But, it is costly in some projects, due to the long distances to access the source of high-quality materials, as well as environmental constraints. Therefore, this study intends to adopt a more appropriate strategy in order to achieve desired strength properties using 3D geosynthetic reinforcement called geocell. In this study, both laboratory experiments and numerical analyses were employed to investigate the layout-dependent and dimensional effects of geocell on the shear strength of reinforced soil in various sections of a reinforcing element. Experimental outputs were extended using numerical simulation through the finite element method. The results indicated that geocell with smaller pocket opening diameter increased the shear strength of soil up to 31%. It was also observed that despite the increase in the pocket opening diameter (up to 80%), only 4% decrement occurred in the value of shear strength. Due to the increase in the aspect (height-diameter) ratio of geocell, the interface shear strength between the soil and geocell edge increased. When the failure plane exactly passed through the middle of the geocellheight, the shear strength is increased by 11%, in comparison with the state that the edge of geocell is tangential to the failure plane. However, when the geocell moved away from the failure plane, the shear stress-horizontal displacement curves had a similar trend to that of the unreinforced soil.

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“…The study appointed that the second improvement method was effective and able to increase the maximum bearing capacity of such type of granular gypseous soil. E Cicek and E Guler [8] investigated different parameters affecting geotextile-reinforced soil. The study tracked the effects experimentally.…”

Section: Introductionmentioning

confidence: 99%

Investigation behavior of gypsum soil reinforced by geosynthetics supported square footing-an experimental study

Waleed,

Selçuk,

Mohsen

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Recently, an urban expansion prompted to construction of structures on weak or unsuitable ground soils. In a sustainable view, there is a need to investigate and improve such types of soils under consideration. Gypsum soil is one of the weak soils when exposed to wetness, especially the value of bearing capacity and Collapse. The main objective of this study is to carry out several model tests for gypsum soil at a relative density of 30% for dry and wet conditions under static vertical stress. The study involved evaluating the effectiveness of soil stabilization using geosynthetics reinforced (geotextile and E-glass fiber fabric) by using single, double, and triple layers placed at different locations. Soil with a gypsum content of 47% was used. Experimental tests were carried out on soil models for the dry and saturated conditions for a relative density of 30%. The ultimate bearing capacity was calculated, as well as the ratio of improvement BCR% according to the reinforcement layers. It was found that the ultimate bearing capacity increases 100% when using E-glass fiber fabric comparing used geotextile at reinforcement triple layers (0.25B+0.5B+1B) for dry state.

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Stress Distribution below a Continuous Footing on Geotextile-Reinforced Soil

Cited by 17 publications

References 23 publications

Comparative Study on the Reinforced Sand-Bed and the Stone Column in Improving the Clay Deposit Supporting Isolated Footing

Comparative Study on the Reinforced Sand-Bed and the Stone Column in Improving the Clay Deposit Supporting Isolated Footing

The effect of geocell dimensions and layout on the strength properties of reinforced soil

Investigation behavior of gypsum soil reinforced by geosynthetics supported square footing-an experimental study

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