Investigation of the flow field and the starting conditions of wind-induced erosion of the railway embankment

Zhang, J.; Cui, Erqian; Fu, Guoqiang

doi:10.1016/0167-6105(94)00073-m

Cited by 7 publications

(3 citation statements)

References 1 publication

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“…One is aeolian erosion and sand abrasion to the railway's foundation, which mainly occurs in the region with strong windy condition, bare surface and sparse vegetation (Copley 1987;Bergstrom et al 1992;Zhang et al 1995). The other aspect is sand burial, especially on the roadbeds.…”

Section: Characteristics Of Wind-blown Sand Along the Qtrmentioning

confidence: 99%

Characteristics of wind-blown sand and dynamic environment in the section of Wudaoliang-Tuotuo River along the Qinghai-Tibet Railway

Zhang

Niu

et al. 2011

Environ Earth Sci

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Based on the detailed wind data and in situ observation of wind-blown sand in the section of Wudaoliang-Tuotuo River along the Qinghai-Tibet Railway, the dynamic environment of sand flow, involving sand-laden wind, drift potential, sand transport and their time variation were investigated. The prevailing direction of sand-laden wind obviously varies seasonally. Sand-laden wind presents unidirectional characteristics from winter to the next spring and its prevailing direction is westerly. In summer, northeasterly wind begins to increase and lasts for a short period. The annual drift potential along the Qinghai-Tibet Railway reaches 970.54 Vector Units (VU), which belongs to a high-energy wind environment. Directional variability of wind regime (RDP/DP, RDP is the resultant drift potential (RDP) and DP is drift potential) is 0.88. The RDP is 854.31VU in the direction of 89.7°, which indicates that westerly sand-laden wind prevails in this region. Sand transport is well correlated to the frequency of sand-laden wind and increases with drift potential logarithmically.

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Section: Characteristics Of Wind-blown Sand Along the Qtrmentioning

confidence: 99%

Characteristics of wind-blown sand and dynamic environment in the section of Wudaoliang-Tuotuo River along the Qinghai-Tibet Railway

Zhang

Niu

et al. 2011

Environ Earth Sci

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“…In particular, the windinduced accumulation of sand poses key challenges for railways crossing deserts and arid regions (e.g. Zhang et al, 1995Zhang et al, , 2010Zakeri and Forghani, 2012;Cheng and Xue, 2014;Cheng et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Solid barriers for windblown sand mitigation: Aerodynamic behavior and conceptual design guidelines

Bruno

Fransos²,

Giudice

2018

Journal of Wind Engineering and Industrial Aerodynamics

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Protection from windblown-sand is one of the key engineering issues for construction and maintenance of human infrastructures in arid environments. In the last century, several barriers with different shapes have been proposed in order to overcome this problem, but literature lacks of a systematic performance quantitative analysis, and the key geometric parameters that promote sedimentation have not been yet recognized. A deep understanding of the aerodynamics effects of sand barrier on the flow is an unavoidable step to achieve these objectives. The present computational study aims to comparatively analyze different kinds of windblown sand mitigation solid barriers, clarify their working principles, extract from the aerodynamics analysis key geometrical features of the barriers and relate them to the sand trapping performances. Approximated metrics for performance assessment are introduced using aerodynamic parameters. The performances of an innovative solid barrier and the ones of commonly used solid barriers are compared in terms of these metrics. The effects of incoming wind velocity profiles on sand trapping performances are evaluated as well. An empirical dimensionless performance estimator is proposed and used to provide general design guidelines.

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“…The first form involves wind erosion and sand abrasion, which can undermine the railbed and damage structures such as power lines. It mainly occurs in windy regions that have large areas with a bare sandy surface and sparse vegetation (Copley, 1987;Bergstrom et al, 1992;Zhang et al, 1995). The second form is sand burial, especially of the railbed.…”

Section: Introductionmentioning

confidence: 99%

Wind Tunnel Simulation of Windblown Sand Along China's Qinghai–tibet Railway

Zhang

Han

et al. 2012

Land Degrad Dev

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The Qinghai–Tibet Railway is frequently damaged by windblown sand, and this hinders railway operation. To better understand the characteristics of windblown sand near the railway, wind tunnel experiments were conducted for the Tuotuo River Section, a typical stretch suffering from windblown sand damage. According to climate data, the windy period combines with an arid seasonal climate to increase the risk of blowing sand in this area. Wind tunnel simulation results showed how the airflow interacted with the railway embankment to create sand deposition as well as aeolian erosion. Sand transport rates behind the railbed fitted a Gaussian function well. The results can be used to guide the design of sand‐control structures both in the study area and in other areas that experience threats from windblown sand. Copyright © 2012 John Wiley & Sons, Ltd.

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Investigation of the flow field and the starting conditions of wind-induced erosion of the railway embankment

Cited by 7 publications

References 1 publication

Characteristics of wind-blown sand and dynamic environment in the section of Wudaoliang-Tuotuo River along the Qinghai-Tibet Railway

Characteristics of wind-blown sand and dynamic environment in the section of Wudaoliang-Tuotuo River along the Qinghai-Tibet Railway

Solid barriers for windblown sand mitigation: Aerodynamic behavior and conceptual design guidelines

Wind Tunnel Simulation of Windblown Sand Along China's Qinghai–tibet Railway

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