Analytical modeling of geogrid reinforced soil foundation

Sharma, Raghav; Chen, Qiming; Abu-Farsakh, Murad; Yoon, Sung-Min

doi:10.1016/j.geotexmem.2008.07.002

Cited by 171 publications

(58 citation statements)

References 25 publications

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“…The boundary effect on the tests could be neglected in this paper according to Michalowski (2004). The influences of different parameters contributing to the performance of reinforced soil foundation were examined by several authors (e.g., Sharma et al, 2009;Michalowski and Shi, 2003;Yamamoto and Kusuda, 2001). These mainly include the total depth of reinforcement (D r ), the vertical spacing between reinforcement layers (h), and the length of reinforcement.…”

Section: Materials Propertiesmentioning

confidence: 99%

“…These mainly include the total depth of reinforcement (D r ), the vertical spacing between reinforcement layers (h), and the length of reinforcement. Sharma et al (2009) introduced that the optimum vertical spacing between reinforcement layers (h) was 0.2B-0.5B (B is the width of strip footing) based on the model tests. In this paper, the vertical spacing between reinforcement layers (h) was a constant of 0.25B.…”

Section: Materials Propertiesmentioning

confidence: 99%

“…Thus, the stress diffusion angle along the bend section was 2.5 times of that along the strip footing edges. Normally, the stress diffusion angle along the bend section was considered as that of reinforced cushion in Sharma et al (2009). In practical engineering, the stress diffusion angle of reinforced cushion is in the range of 28° to 38°.…”

Section: Evolution Of Displacement Field In the Reinforced Foundationmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Study on Reinforced Foundation Using Transparent Soil Technique

Chen¹,

Jiang²,

Xue³

et al. 2017

dtetr

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Five scaled model tests of reinforced foundation with different reinforcement length and depth (layer numbers) as well as one contrast test of unreinforced foundation were carried out using transparent technique. The evolution of displacement field in the reinforced foundation and procedure of slide failure under strip loading were investigated. The results show that during the settlement of strip footing, horizontal displacement accumulates firstly in the unreinforced zone near the lower right and left corner of the reinforced zone, and then extends upward to reinforcement layers, which causes the tensile failure of the reinforcements successively from bottom to top and at last forms macro shear failure surface. Two stress diffusion zones are formed during the settlement of the strip footing. The two zones extend downward along the bend section of each reinforcement layers and the trip footing edges, respectively. The stress diffusion angle along the bend section is 2.5 times of that along the strip footing edges. Both of reinforced and unreinforced foundations fail in Prandtl slide mode. The depth and width of the slip surfaces increase with an increase of reinforced depth and reinforcement length.

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Section: Materials Propertiesmentioning

confidence: 99%

Section: Materials Propertiesmentioning

confidence: 99%

Section: Evolution Of Displacement Field In the Reinforced Foundationmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Study on Reinforced Foundation Using Transparent Soil Technique

Chen¹,

Jiang²,

Xue³

et al. 2017

dtetr

View full text Add to dashboard Cite

show abstract

“…Sharma et al (2009) examined the foundations placed on geo-grid reinforced soil and found that the first layer of reinforcement must be close to foundation with an optimal depth range of 0.5B-2B in which B is the footing width. They also reported that the length of reinforcement must be between 2B and 8B (Sharma, R., Chen, Q., Abu-Farsakh, M., & Yoon, S. 2009). Nazir and Sawwaf (2010) conducted a study on the behavior of rectangular foundation located on geo-grid reinforced sand.…”

Section: Introductionmentioning

confidence: 99%

Study on the Impact of Strain Rate and Loading Speed on Geogrid-Reinforced Soil

Zarringol

2017

JSD

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During the past decades, reinforced soil has normally been constructed by coarse grained soil. Recently, low quality and locally accessible materials have been successfully used in reinforced soil due to economic observations. Loading speed is one of the effective factors in soil-geosynthetic interaction. In order to determine the impact of this factor, we carried out a pullout test on the samples with dimensions of 30×30×17 cm under four strain rates of 0.75, 1.25, 1.75 and 2.25 mm/min and three vertical stress rates of 20, 50 and 80 KN/m 2 . The results of this study indicated that the mobilization of geosynthetic strength in contact area depends on the amount of vertical stress. The increased vertical stress results in the increased shear strength in clay-geogrid contact area. Furthermore, the increased strain rate results in the reduced shear strength.

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“…The mobilised reinforcement force, ultimately limited by the available bond, acts to alter the force equilibrium in the soil (Jewell 1996). The performance of reinforced soil foundations depends not only on soil and reinforcement properties, but also on this interaction between the soil and reinforcement (Sharma et al 2009). Sharma et al (2009) also noted that geogrids with higher tensile moduli performed better than geogrids with lower moduli, whilst Binquet and Lee (1975) were also the earliest researchers to show that a failure load could be increased by the use of multiple layers of reinforcement.…”

Section: Introductionmentioning

confidence: 99%