Effects of different types of guardrails on sand transportation of desert highway pavement

Li, Gao; Cheng, Jianjun; Wang, Haifeng; Yuan, Xinxin

doi:10.1007/s40333-022-0030-z

Cited by 6 publications

(3 citation statements)

References 21 publications

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“…Li et al [9] analyzed the trajectory changes of sand particles under different diameters and slope conditions of road bases using wind tunnel experiments. Scholars such as Yu et al [10], Cheng et al [11], and Gao et al [12] have studied road system selection and optimization through wind tunnel experiments. Abdikerem et al [13] established a model to determine sand movement patterns under different airflow conditions using the weak coupling relationship between airflow and sand flow fields.…”

Section: Introductionmentioning

confidence: 99%

Analysis of significant risk factors for sand accumulation on desert expressways

Wang,

Liu,

Sun

et al. 2024

Meas. Sci. Technol.

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Expressways in desert areas are prone to sand lifting and accumulation. This study aims to explore the impact of various risk factors on sand accumulation on road surfaces. Initially, the study identifies the causes of these risks through on-site investigation. Subsequently, using Fluent numerical simulation, it examines how different wind speeds, wind directions, route angles, embankment heights, embankment widths, embankment slope ratios, and central median layouts affect sand accumulation. Finally, based on simulation results and sand accumulation data from the Uma Expressway's desert section, the study evaluates the importance of these factors using ordered logistic regression analysis and proposes strategic recommendations. The findings indicate that the degree of sand accumulation increases with higher wind speeds, more significant embankment heights, and variations in wind direction, route angle, and embankment width, as well as the configuration of the central median. Wind speed and embankment height are identified as the main factors influencing sand accumulation. Based on the risk assessment, the study suggests a four-point preventive strategy: (i) implementing wind speed management measures; (ii) optimizing embankment design; (iii) developing sand prevention strategies for the central median; and (iv) adjusting the alignment of the road relative to the wind direction.

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Section: Introductionmentioning

confidence: 99%

Analysis of significant risk factors for sand accumulation on desert expressways

Wang,

Liu,

Sun

et al. 2024

Meas. Sci. Technol.

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“…Wind tunnel tests allow scaling building entities by adopting granular materials with different properties and performing calculations according to the similarity criterion (Zhou et al, 2019). However, wind tunnel tests are inadequate, expensive, and adaptable to the similarity criterion to varying degrees (Tominaga et al, 2011;Gao et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Characteristics of snow cover distribution along railway subgrade and the protective effect of snow fences

Lei,

Cheng,

Gao

et al. 2023

J. Arid Land

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Railways built in cold, snowy, and lightly populated areas are subjected to wind and snow disasters. In this study, we selected a snow hazard prevention and control section of the Altay-Zhundong Railway in Xinjiang Uygur Autonomous Region of China as the research object. We investigated the deposited snowfall variation characteristics on the two sides and in the embankment pavement area of snow fences with different porosities, fence heights, and arrangement distances using single-factor tests and orthogonal tests based on global atmospheric reanalysis climate data, field survey data, and a multi-phase flow analysis model. The results showed significant differences in the characteristics of snow cover distribution and snow cover thickness between the embankment and the cutting in the absence of snow protection measures. The maximum snow cover thickness of the embankment pavement decreased by 12.6% relative to the cutting pavement. The snow cover thickness of the embankment exhibited an increasing trend from windward shoulder to leeward shoulder, whereas the snow cover thickness of the cutting presented a declining trend from windward shoulder to leeward toe. In the collaborative prevention and control of snow fences and embankments, the three factors can be ranked in terms of their sensitivity to deposited snowfall within the influence scope of snow fences as follows: fence height>arrangement distance>porosity. At the same time, fence height yielded a significant relationship for the influence scope of snow fences (P<0.05). The three factors can also be ranked in terms of their sensitivity to deposited snowfall on the pavement as follows: porosity>fence height>arrangement distance. For the embankment protection of the Altay-Zhundong Railway against wind and snow, snow fence with a porosity of 75%, a fence height of 4.8 m, and an arrangement distance from the embankment of 60 m produced the best snow control effect. By revealing the characteristics of snow cover distribution along railway subgrade and the protective effect of snow fences, this study provides valuable references for the engineering applications of railway construction in areas prone to wind and snow disasters.

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“…Wang et al [17] found the checkerboard sand barriers with enhanced checkerboard size and barrier height are needed to improve the efficiency of sand protection. Based on the comparison experiment, Gao et al [18] found the cable guardrail should be preferred as a desert highway guardrail, followed by the W-beam guardrail and the concrete guardrail is unsuitable. Based on the field observation and indoor calculation, Xie et al [19] suggested that the sand-controlling pattern should be dominated by sand blocking or fixing and combined with vegetation.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on Sand Sediment Protection on Railway Tracks

Zhang

et al. 2022

Applied Sciences

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The wind-blown sand disaster on the railway has a very important negative influence on the economic development of traffic networks in desert areas. While there are some engineering protection measures for railway sand deposition, they are far from satisfactory in terms of economic efficiency and protection performance. Therefore, it is still of great practical significance to explore novel measures for actively preventing sand deposition on railway tracks in desert areas. In this article, the laws of sand deposition on single and dual tracks were studied with the help of field experiments. On this basis, it can be seen that the deposition of sand on the rear track can be effectively reduced by placing various types of baffles on the track. Field experiments were designed to study the change law of sand deposition ratio in front of the tracks caused by placing baffles of different cross sections. The results show that placing a 45° inclined baffle on the track can reduce the volume of sand deposition by up to 42%. The findings in this paper can provide scientific guidance for the design of new desert railways or novel protective measures for railway sand deposition.

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Effects of different types of guardrails on sand transportation of desert highway pavement

Cited by 6 publications

References 21 publications

Analysis of significant risk factors for sand accumulation on desert expressways

Analysis of significant risk factors for sand accumulation on desert expressways

Characteristics of snow cover distribution along railway subgrade and the protective effect of snow fences

Experimental Research on Sand Sediment Protection on Railway Tracks

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