Investigation of geotextile–soil interaction under a cyclic vertical load using the discrete element method

Bhandari, Anil; Han, Jie

doi:10.1016/j.geotexmem.2009.09.005

Cited by 90 publications

(35 citation statements)

References 30 publications

(39 reference statements)

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“…The properties of embankment fill have been calibrated by numerical biaxial tests (Jenck et al, 2009;Bhandari and Han, 2010;Han et al, 2012;Lai et al, 2014). A set of un-bonded particles with diameters ranging from 4.0 mm to 7.0 mm are generated at a porosity of 0.16 under the gravity deposition method.…”

Section: Embankment Fill Propertiesmentioning

confidence: 99%

“…As an alternative, the discrete element method (DEM), based on the dis-continuum assumption, offers an approach for gaining an insight into the micro-behaviour of granular material. DEM has received increasing attention and popularity over the past decade or more (Jenck et al, 2009;Bhandari and Han, 2010;Han et al, 2012;Lai et al, 2014;Wang Z.J. et al, 2014; since it addresses the major drawbacks of FEM and FDM.…”

Section: Introductionmentioning

confidence: 99%

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Visualization of the formation and features of soil arching within a piled embankment by discrete element method simulation

Zheng

Zhang

Cui

2016

J. Zhejiang Univ. Sci. A

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Piled embankments are widely used in highway and railway engineering due to their economy and efficiency in overcoming several issues encountered in constructing embankments over weak soils. Soil arching, caused by the pile-subsoil relative displacement (Δs), plays an important role in reducing the embankment load falling on weak soil, however, the fundamental characteristics (e.g., formation and features) of soil arching remain poorly understood. In this study, a series of discrete element method (DEM) modellings are performed to study the formation and features of soil arching with the variation of Δs in piled embankments with or without geosynthetic reinforcement. Firstly, calibration for the modelling parameters is carried out by comparing the DEM results with the experimental data obtained from the existing literature. Secondly, the analysis of the macroand micro-behaviours is performed in detail. Finally, a parametric study is conducted in an effort to identify the influences of three key factors on soil arching: the friction coefficient of the embankment fill (f), the embankment height (h), and the pile clear spacing (s−a). Numerical results indicate that Δs is a key factor governing the formation and features of soil arching in embankments. To be specific, soil arching gradually evolves from two inclined shear planes at a small Δs to a hemispherical arch at a relatively large Δs. Then, with a continuous increase in Δs, the soil arching height gradually increases and finally approaches a constant value of 0.8(s−a) (i.e., the maximum soil arching height). For a given case, the higher the soil arching height, the greater the degree of soil arching effect. The parametric study shows that the friction coefficient of the embankment fill has a negligible influence on the formation and features of soil arching. However, embankment height is a key factor governing the formation and features of soil arching. In addition, pile clear spacing has a significant effect on the formation of soil arching, but not on its features.

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Section: Embankment Fill Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Visualization of the formation and features of soil arching within a piled embankment by discrete element method simulation

Zheng

Zhang

Cui

2016

J. Zhejiang Univ. Sci. A

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“…DEM has also been used in other fields besides silos and hoppers, such as some infrastructure problems involving handling of soils or rocks. This is the case of slope protection (Kim et al, 1997;Plassiard and Donze, 2010), geotextiles (Bhandari and Han, 2010), buried pipes (Kuwata et al, 2010), or rural road pavements (Mahmoud and Masad, 2010;Shen and Yu, 2011).…”

Section: Discrete Element Methods In Buildings and Infrastructures Arementioning

confidence: 99%

Present and future of the numerical methods in buildings and infrastructures areas of biosystems engineering

Ayuga

2015

J Agricult Engineer

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Biosystem engineering is a discipline resulting from the evolution of the traditional agricultural engineering to include new engineering challenges related with biological systems, from the cell to the environment. Modern buildings and infrastructures are needed to satisfy crop and animal production demands. In this paper a review on the status of numerical methods applied to solve engineering problems in the field of buildings and infrastructures in biosystem engineering is presented. The history and basic background of the finite element method is presented. This is the first numerical method implemented and also the more developed one. The history and background of other two more recent methods, with practical applications, the computer fluids dynamics and the discrete element method are also presented. Besides, a review on the scientific and professional applications on the field of buildings and infrastructures for biosystem engineering needs is presented. Today we can simulate engineering problems with solids, engineering problems with fluids and engineering problems with particles and get to practical solutions faster and cheaper than in the past. The paper encourages young engineers and researchers to make progress these tools and their engineering applications. The capacities of all numerical methods in their present development status go beyond the present practical applications. There is a broad field to work on it. IntroductionThe present paper is a review of the numerical methods at present and their applications in solving engineering problems. The field is too wide to be considered in a single article. This is why the paper focuses on presenting the fundamentals of the most significant numerical methods that can be applied for buildings and infrastructures areas of biosystems engineering. The three next numerical methods will be considered: i) finite element method (FEM); ii) computer fluid dynamics (CFD); iii) discrete element method (DEM).In the paper the main features of these methods will be presented along with showing some examples in areas of biosystems engineering. Modern engineering can be considered to begin with the industrial revolution in the late eighteenth and early nineteenth century. From the very beginning, it has used the most powerful mathematical tools of the time in order to solve problems arising in practice. It was considered a fact that it was essential acquiring solid mathematical foundations for being a good engineer. The programs of studies from all Universities of the time prove it so. Even great figures on mathematics of the nineteenth and twentieth centuries were formally engineers. This symbiosis has produced good results for society. In the second half of XX Century, the fast development of computer science produced a great advance in numerical methods applied to physics and engineering.Based on this premise, the predictable future is that calculation and structural analysis in all fields of engineering will be based on modern numerical methods. This power...

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“…Cyclic triaxial test results have indicated that the shear modulus of reinforced soil is not only under the control of shear strain, but also under the control of many factors such as ber content, loading repetition, and con ning pressure [21]. Bhandari and Han [22] worked on the interaction between the geotextile and the soil under a cyclic wheel load applying the discrete element method. e results showed that the geotextile depth had a major e ect on the degree of interaction between the geotextile and the soil.…”

Section: Introductionmentioning

confidence: 99%

The Liquefaction Behavior of Poorly Graded Sands Reinforced with Fibers

Karakan

Eskişar

Altun

2018

Advances in Civil Engineering

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is study focuses on the performance of fibers, improving the resistance to liquefaction in loose sands, medium sands, and dense sands in Izmir, Turkey. A systematic testing schedule consisting of cyclic triaxial tests was held under stress-controlled and undrained conditions on saturated sand specimens with and without fiber reinforcements. e major parameters having effects on the dynamic behavior such as fiber content, fiber length, and relative density on the liquefaction behavior and the excess pore water pressure developments of specimens with and without fibers were investigated. If the fiber content or the fiber length was increased in the specimens, higher number of loading cycles was needed in order to experience the liquefaction of sands. e reinforcement effect in medium-dense specimens was found to be apparently distinctive compared to loose specimens. e curves of pore water pressures and shear strains were achieved for the fiber-reinforced sands. e boundaries of pore water pressure curves presented in the literature on the clean sands were utilized in comparison with the pore water pressure curves of fiberreinforced sands of this study. As a conclusion, the results presented in this study are useful to develop insight into the behavior of clean and fiber-reinforced sands under seismic loading conditions. Based on the test results, it was found that the number of loading cycles had a strong impact on the excess pore pressure generation.

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Investigation of geotextile–soil interaction under a cyclic vertical load using the discrete element method

Cited by 90 publications

References 30 publications

Visualization of the formation and features of soil arching within a piled embankment by discrete element method simulation

Visualization of the formation and features of soil arching within a piled embankment by discrete element method simulation

Present and future of the numerical methods in buildings and infrastructures areas of biosystems engineering

The Liquefaction Behavior of Poorly Graded Sands Reinforced with Fibers

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