Load transfer and arching analysis in reinforced embankment

Fattah, Mohammed Y.; Mohammed, Hadeel Ammar; Hassan, Hanan A.

doi:10.1680/jstbu.15.00046

Cited by 14 publications

(14 citation statements)

References 10 publications

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“…The correlation between the influencing factors and the vertical stress-settlement response of the underground soil pile-embankment system was established through parameter research [12] . Through the numerical simulation of the embankment model [13] , it was found that the bearing capacity increased by 13% and 23% respectively when the geogrid layer was embedded at the interface and 0-1h. For soft soil embankments reinforced with ordinary stone pillars, as the load increases, the settlement value will decrease, which means the ultimate bearing capacity increases [14] .…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of re-packed reinforced Earth embankment during service stage

Hou

Wang

Huang

et al. 2021

Journal of Asian Architecture and Building Engineering

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： Problems of large settlements and uneven settlements on the road always happen during service stage. Reinforced embankments can reduce these problems. But currently the study on the mechanical properties of reinforced embankments during service stage are so few, and lack of measured data. This study uses numerical simulation and on-site measured data analysis to set up a geogrid creep damage model and traffic load model. Based on the analysis of the mechanical properties of reinforced embankment under the conditions of new test section and widening test section, the influence laws of traffic load amplitude, frequency and driving interval on reinforced embankment are obtained. When the traffic load amplitude is 2 0 , there is little difference in settlement between the two test sections, but the settlement ratio gets the maximum value of 0.028 mm/d when the amplitude is 2 0 . When the traffic load frequency increases from 1 Hz to 4 Hz, the embankment settlement is in the sudden settlement stage, and the settlement is almost stable after 4 Hz. When the driving interval is greater than 4 s, the rebound value and rebound time are almost stable.

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Section: Introductionmentioning

confidence: 99%

Mechanical properties of re-packed reinforced Earth embankment during service stage

Hou

Wang

Huang

et al. 2021

Journal of Asian Architecture and Building Engineering

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“…For example, according to Elias et al (2001), the advantages provided by using geosynthetic materials to reinforce soil structures are noted under these conditions. Besides, the polymeric material can be employed with other solutions to improve lateral support, such as exposed by Fattah et al (2015Fattah et al ( , 2016a. Many deterministic methods have been proposed aiming to determine the key design features of geosyntheticreinforced soil structures (Koerner, 2012;Ariyarathne and Liyanapathirana, 2015;Fonseca and Palmeira, 2018).…”

Section: Introductionmentioning

confidence: 99%

Reliability Analysis of a Controlled Stage-Constructed and Reinforced Embankment on Soft Ground Using 2D and 3D Models

Belo

Silva

2020

Front. Built Environ.

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Geosynthetic reinforcement has become a very practical technique to improve geotechnical structure safety. In spite of improved soil behavior, structures are affected by uncertainties related to soil and reinforcement material properties. This paper aims to present a reliability analysis in order to take statistical information (uncertainties) into account in a safety analysis of reinforced embankments. The analysis was used in a case study on a controlled stage-constructed embankment on soft ground in order to investigate its probabilistic stability. Modeling was performed by commercial geotechnical software usage (GeoStudio and RocScience packs, SIGMA/W + SLOPE/W, and SLIDE 3 , respectively) and the reliability structural analysis was acquired by coupling this software with a reliability program. Then, two numerical models were simulated: a 2D and a 3D one. For this application, the First Order Reliability Method (FORM) was assumed for the reliability analyses. The statistical information, as well as the correlation between variable pairs, was based on a literature review. In total, 29 parameters were assumed as random variables (splitting parameters from different zones and layers). At the same time, the influence of the uncertainty level on reliability analysis and the sensitivity of parameters (assumed as random variables) were investigated. As a result, the reliability indexes obtained showed that the structure analyzed should not be considered with a satisfactory safety level. Meanwhile, the uncertainty level assumed for random variables can lead the probabilistic analysis to very different conclusions about the structural safety, and the most sensitivity parameters observed were the bulk unit weight (clay-soft soiland fill material) and the undrained shear strength, followed by a slight importance of the initial void ratio.

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“…One of the major uncertainties in the design is the interaction between underground structure and surrounding soils which is dependent on the type and shape of structure, type of surrounding soils and free field stresses. Arching mechanisms play a pivotal role in the interaction between surrounding soils and underground structures/inclusions (e.g., Lee et al 2006;Meguid et al 2008;Costa et al 2009;Van Eekelen 2015& Fattah et al 2016. Depending upon the relative displacement between the underground structure/inclusion and adjacent soils, redistribution of stresses would occur as a result of the formation of either active or passive arching.…”

Section: Introductionmentioning

confidence: 99%

Analysis of sequential active and passive arching in granular soils

Aqoub

Mohamed

Sheehan

2018

International Journal of Geotechnical Engineering

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Arching in soils has received great attention for several decades due to its significance on the soil-underground structure-interaction. However, soil layers underneath such an underground structure might undergo cycles of swelling and shrinking resulting in the generation of alternating active and passive modes of soil-underground structure-interaction. Consequently, the stresses on the underground structure and adjoining regions of ground become complex. The state of stress on underground structures as a result of cycles of active and passive arching was neither explored nor systematically assessed. In the present study, comprehensive investigation was carried out to examine; i. the effects of direction of initial displacement to induce an initial active or passive arching, ii. the behaviour of subsequent arching, iii. the effect of magnitude of initial displacement on the formation of arching and iv. the influence of soil height on sequential active & passive arching. The experimental results showed clearly that the magnitude of displacement of the yielding region significantly affects the formation of the arch and the degree of stress redistribution. Alternating the displacement of the underground inclusion exacerbated the formation of active and passive arching leading to a substantial reduction in shear resistance and stress redistribution. It is noted that the greatest loss in shear resistance occurs from the second cycle and remains virtually the same with further cycles. Sequentially alternating displacement of the underground inclusion is found to be detrimental to the formation of full active and passive arches irrespective of the burial height.

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Load transfer and arching analysis in reinforced embankment

Cited by 14 publications

References 10 publications

Mechanical properties of re-packed reinforced Earth embankment during service stage

Mechanical properties of re-packed reinforced Earth embankment during service stage

Reliability Analysis of a Controlled Stage-Constructed and Reinforced Embankment on Soft Ground Using 2D and 3D Models

Analysis of sequential active and passive arching in granular soils

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