Effect of boundary conditions on earth pressure reduction using EPS Geofoam

Dave, Trudeep N.; Dasaka, Satyanarayana Murty

doi:10.3208/jgssp.ind-34

Cited by 4 publications

(2 citation statements)

References 10 publications

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“…The reductions depend on wave intensity, inclusion characteristics, and the wall flexibility. Whereas, Dave, and Dasaka [20] and Dave et al [21] found out the reduction is about 23% in their experimental investigation.…”

Section: Experimental Researchesmentioning

confidence: 81%

Decreasing Earth Thrust with EPS Geofoam

2023

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The basic function of retaining walls is to support soil backfill and water. This function has to be adequate under different conditions of loading; with permissible deformations. Researches are addressing the reduction of the exerted lateral earth thrust and water pressures to satisfy the adequacy in reasonable costs. Expanded polystyrene geofoam, EPSG, is the most popular material adopted to decrease lateral earth thrust on retaining walls. This paper presents an article review on researches of this aspect. Equations were proposed for reduction in lateral forces and overturning moments. Its aim is to optimize the design of 8.0 m gravity retaining wall with installation of EPSG.

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Section: Experimental Researchesmentioning

confidence: 81%

Decreasing Earth Thrust with EPS Geofoam

2023

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“…It was found that provision of ESP geofoam can reduce the maximum seismic thrust on the wall by about 28%. In a similar study, Dave et al [62] found that retaining walls with hinged boundary showed a hydrostatic seismic pressure distribution while fixed walls showed a curvilinear seismic pressure distribution. Ertugrul et al [45,63,64] found that low density geofoam can reduce pressure by up to 50% of the dynamic thrust acting on the wall.…”

Section: Experimental Studiesmentioning

confidence: 88%

A Numerical Study on the Role of EPS Geofoam in Reducing Earth Pressure on Retaining Structures Under Dynamic Loading

Khan

Meguid

2021

Int. J. of Geosynth. and Ground Eng.

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The magnitude of lateral earth pressure plays an important role in the analysis and design of earth retaining structures. Expanded polystyrene (EPS) geofoam panels have been successfully used in reducing lateral thrust on walls under static loading condition. The presence of geofoam panels between a rigid wall and the backfill soil allows for controlled deformation to develop, which leads to the mobilization of soil shear strength. When subjected to dynamic loading, the magnitude of earth pressure acting on a rigid wall can become significantly larger. In this study, a finite element model is developed to investigate the effectiveness of installing geofoam buffer behind a rigid retaining wall on the seismic lateral thrust induced by the backfill material. A parametric study was then conducted to investigate the effect of geofoam density, relative thickness of the geofoam with respect to the wall height and the friction angle of the backfill soil on the effectiveness of this technique to reduce the impact of seismic events on the stability of the wall. Results showed that provision of geofoam behind rigid non-yielding retaining wall can provide 10-40% reduction in seismic thrust depending on the geofoam density, relative thickness and frictional properties of the backfill soil.

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Mechanical behaviour and stress-strain recovery characteristics of expanded polypropylene

Maqsood

Koseki

Kyokawa

2024

Geosynthetics International

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Expanded Polypropylene (EPP) foam has been widely recognized as an energy absorbing material, and it is routinely used for variety of industrial applications. However, EPP foam has a relatively limited scope in the construction industry, especially for load-bearing applications. To address this aspect, the mechanical behaviour of EPP foam was examined under unconfined conditions in this study, and the effects of different preloading/precompression strain histories (5% to 60%) on the stress-strain response and strain energy characteristics of EPP were evaluated. Additionally, the stress-strain recovery behaviour of EPP foam having different preloading histories was also studied while considering the effects of recovery time after preloading (0 to 28 Days). The results suggest that EPP foam subjected to different preloading histories has identical patterns of stress-strain response as of other conventional closed-cell polymeric foams, such as Expanded Polystyrene (EPS) foam, and EPP can adequately be used for load-bearing applications under the recommended design limits. Furthermore, noticeable recovery in the stress-strain response of EPP was also witnessed during the initial 14 days after preloading. Based on these findings, it is anticipated that the promising stress-strain recovery characteristics of EPP foam enable it to be reused, even after experiencing large in-situ deformations.

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Effect of boundary conditions on earth pressure reduction using EPS Geofoam

Cited by 4 publications

References 10 publications

Decreasing Earth Thrust with EPS Geofoam

Decreasing Earth Thrust with EPS Geofoam

A Numerical Study on the Role of EPS Geofoam in Reducing Earth Pressure on Retaining Structures Under Dynamic Loading

Mechanical behaviour and stress-strain recovery characteristics of expanded polypropylene

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