EPS Geofoam as a Wave Barrier for Attenuating High-Speed Train-Induced Ground Vibrations: A Single-Wheel Analysis

Khan, M. Roshan; Dasaka, Satyanarayana Murty

doi:10.1007/s40891-020-00230-1

Cited by 7 publications

(4 citation statements)

References 37 publications

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“…Hence, for estimating the vibration transmission characteristics of the soil at different frequencies, the linear elastic constitutive model was reasonably adopted for the soil. Infinite elements [38,39] were employed at the domain edges to prevent unwanted reflection of waves, as shown in Fig. 10.…”

Section: T R =mentioning

confidence: 99%

Impact of Footing Shape on Dynamic Properties and Vibration Transmission Characteristics of Machine Foundations

Surapreddi

Ghosh

2021

Int. J. of Geosynth. and Ground Eng.

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Due to immense infrastructure development activities, a study on the vibration generated by heavy machinery, construction activities, highway and railway traffic movements has gained importance in recent years. The present study investigates the influence of shape on the system and vibration transmission characteristics of block machine foundations under dynamic loading. A series of block vibration tests were conducted on model foundations laid on the local soil available at IIT Kanpur, India, to evaluate the system characteristics of machine foundations. The vibration transmission characteristics of the foundations were investigated using a 3D finite element (FE) analysis. Three different shapes of foundation (circular, square, and rectangular) were considered for the intended purpose. The effect of the loading intensity on various parameters such as natural frequency, soil stiffness, and damping coefficient was investigated. In addition, the shape effect of foundations on the dynamic shear strain, shear modulus, and the elastic uniform compression coefficient was suitably assessed. The efficiency of a wave barrier in mitigating the machine-induced vibration was investigated. It can be observed that the shape of foundations significantly influences the system characteristics. The circular and square foundations perform better than the rectangular foundation at higher loads. In contrast, the vibration transmission characteristics of block foundations are unaffected by the shape of the foundations. The transmission ratio decreases with an increase in the frequency at the pick-up points located away from the vibration source. It can be noted that the absolute damping varies significantly in the presence of the wave barrier at higher frequencies.

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Section: T R =mentioning

confidence: 99%

Impact of Footing Shape on Dynamic Properties and Vibration Transmission Characteristics of Machine Foundations

Surapreddi

Ghosh

2021

Int. J. of Geosynth. and Ground Eng.

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“…Ongoing research abroad efforts predominantly focus on frost heave [5][6][7][8][9], freezing of water in porous materials [10][11][12], and thermo-technical characteristics of soils and building materials [13][14][15][16][17][18][19][20][21]. Regarding the application of thermal insulation materials within the structural layers or the broader track substructure, more comprehensive and enduring practical experience is globally available in the utilisation of foam thermal insulation materials, specifically EPS and XPS [22][23][24][25][26], collectively known as geofoam (GFM) in the professional and scientific literature. PIR, PUR, and PF, which belong to the same category of foam thermal insulation materials, have excellent thermal insulation parameters.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Assessment of the Effectiveness of the Application of Foam and Extruded Polystyrene in the Railway Substructure

Ižvolt,

Kardoš,

Dobeš

et al. 2023

Buildings

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This article presents the authors’ comprehensive evaluation of the application of specific foam thermal insulation materials, namely expanded polystyrene (EPS) and extruded polystyrene (XPS), within railway substructures. The assessment extends to real-world conditions on the tracks of Slovak Railways (ŽSR), which share substantial similarities with other countries’ railway networks. The assessment of structural composition and material selection considers these technical aspects, while technological feasibility and the environmental implications associated with material production, delivery, and incorporation into railway construction do not. Additionally, the thermal insulation materials’ qualities are compared against conventional railway substructure materials. In these conventional setups, the thermal insulation layer often incorporates crushed aggregate of specified fractions and parameters in line with legislative standards. This article complements previous research conducted at the University of Žilina, focusing on the application of various thermal insulation materials within railway substructures. These materials were both experimentally tested (scale of 1:1) and numerically modelled, with results previously published by the authors. The published works detail the utilisation of diverse thermal insulation materials in railway substructures, primarily evaluating two crucial technical parameters: the protection of the subgrade surface against adverse effects of frost and, secondarily, their impact on the deformation resistance of the railway substructure.

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“…The dynamic transmission behavior of local sub-soil can be changed through a complex wave reflection and mode modification process by building a wave barrier using a wave impeding block [22]. Several works have been reported in the literature using geofoam as an infill material [15,19,[23][24][25][26]. Recently, the use of Crumb Rubber (CR) in the construction industry, such as highway construction, freeze and thaw-resistant concrete [27], has gained popularity.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on Vibration Screening Using Geofoam and Sand–Crumb Rubber Mixture Infilled Trench

Sarkar

Barman

Bhowmik

2021

Int. J. of Geosynth. and Ground Eng.

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This study investigates the application of a composite layer of geofoam and sand-crumb rubber infilled trench (GSFT) as a wave barrier. Rubber is a waste material and its safe disposal is a matter of concern. A numerical investigation was carried out using a two-dimensional finite element method (FEM) in ABAQUS software. A machine foundation was considered as the source of vibration and the screening efficiency was evaluated by calculating the Amplitude Reduction Factor (A r ). The performance of the GSFT was evaluated by varying the loading frequency, location of the trench, trench geometry and the proportion of geofoam and sand-crumb rubber (SCR) mixture. The effect of slenderness ratio and cross-sectional area was found to be critical for trench design. The findings of this study were in good agreement with previous studies on Expanded polystyrene (EPS) geofoam infilled trench and SCR infilled trench. It was observed that GSFT performed similar to the EPS geofoam infilled trench and was better than SCR filled trench. Therefore, it is proposed that GSFT can be used as a potential alternative to the EPS geofoam wave barrier by not only cutting down the cost but also as an eco-friendly alternative.

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EPS Geofoam as a Wave Barrier for Attenuating High-Speed Train-Induced Ground Vibrations: A Single-Wheel Analysis

Cited by 7 publications

References 37 publications

Impact of Footing Shape on Dynamic Properties and Vibration Transmission Characteristics of Machine Foundations

Impact of Footing Shape on Dynamic Properties and Vibration Transmission Characteristics of Machine Foundations

Comprehensive Assessment of the Effectiveness of the Application of Foam and Extruded Polystyrene in the Railway Substructure

Numerical Investigation on Vibration Screening Using Geofoam and Sand–Crumb Rubber Mixture Infilled Trench

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