Investigations into the design of sand control fence for Gobi buildings

Xin, Guowei; Huang, Ning; Zhang, Jie; Dun, Hongchao

doi:10.1016/j.aeolia.2020.100662

Cited by 28 publications

(17 citation statements)

References 30 publications

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“…Each phase is assumed as a continuous medium and wind phase and sand phase are filled with the whole flow field at the same time, and used momentum equations and continuous equations to solve each phase, and added k-ε turbulence model (turbulence intensity I=0.05, turbulence radius R=0.5). These equations (Xin et al, 2021;Li et al, 2022) are in following forms:…”

Section: Mathematical Model and Equationsmentioning

confidence: 99%

“…The efficacy of wind and sand prevention was greatest when the range of the sand barrier porosity was 30% to 50%. Secondly, height of sand barrier is also an important parameter affecting the effect of wind and sand prevention; (Dong et al, 2007;Li and Sherman, 2015) showed that vertical wind barriers of about 0.6-1.3 m were often used in areas with intense and sandstorms; (Cheng et al, 2016;Xin et al, 2021) proposed the effects of inclined insert-plate sand barrier height and slat Angle and wind velocity on sand control effectiveness and got its optimal height is 2.0 m−2.5 m, optimal slat Angle was 135-150. Thirdly, hole diameter is the main factor affecting its sand control effect for porous sand barrier; (Kim and Lee, 2001;Zhang et al, 2015;Chen et al, 2019) explored the influence of the hole size of the porous sand barrier on the wind velocity, indicating the larger the hole size had a higher wind velocity and wind and sand prevention effect was worse.…”

Section: Introductionmentioning

confidence: 99%

“…The sand barrier shows great advantages in preventing wind erosion and sand accumulation as essential component of the mechanical sand control system (Xie et al, 2017); It is usually arranged on the upwind side of the project, which reduces the surface wind velocity and weakens the power of wind to transport sand by increasing the surface roughness, thus having a role in wind and sand prevention (Harris et al, 2020;Xie et al, 2020). At present, the sand barriers commonly used along highways and railways were concrete sand barriers (Cheng et al, 2016;Hongchao et al, 2021;Xin et al, 2021) , nylon net sand barriers (Cheng and Xue, 2014;Xiao et al, 2015) and reed sand barrier (Dong et al, 2000). Because of the difficulty of constructing concrete materials, as well as the high processing and installation costs, nylon mesh reliability and durability are poor, and there is potential harm to the line operation and the environment, making them difficult to popularize and apply.…”

Section: Introductionmentioning

confidence: 99%

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Evolution law of wind-sand flow field of multi-row reed sand barriers and optimal spacing

Cheng

Ding

et al. 2023

Preprint

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The multi-row sand barriers have been widely concerned about their high efficiency wind and sand prevention effect in the sand blown prevention and control for road engineering. The spacing between sand barriers is the primary issue to be resolved in the arrangement of multi-row sand barriers. This study considered the reed sand barrier protection project of Xinjiang segment of Golmud-Korla railway as the research object, revealed the evolution characteristics of flow field and distribution laws of sand accumulation under the control of three-row sand barriers spacing by field observation, wind tunnel test and numerical simulation, and the optimal spacing of three-row reed sand barriers was explored by Design Exploration optimization analysis method. The results indicated the flow field presented a typically superimposed morphology of deceleration zones, acceleration zones, and recovery zones when airflow passed through the reed sand barrier. There was no deceleration zone ahead the second and third-row sand barriers before optimization; the flow field distribution was complete and each-row sand barrier can have a synergistic role in wind and sand prevention after optimization. The optimal spacing between three-row sand barriers decreases as wind velocity increases. The optimal spacing between sand barriers corresponding to 10 m s− 1, 15 m s− 1 and 20 m s− 1 wind velocity is 25.5m, 24m and 20.0m respectively. The sand-blocking rates of corresponding reed sand barriers were 84.53%, 64.42% and 47.51%, which were 8.54%, 20.77% and 0.78% higher than before optimization, respectively. Therefore, it was suggested that the spacing of three rows reed sand barriers is 20 ~ 25 m in the survey region, so that each-row sand barriers can play a role.

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Section: Mathematical Model and Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evolution law of wind-sand flow field of multi-row reed sand barriers and optimal spacing

Cheng

Ding

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Common types of sand fence design-types include horizontal, upright, holed-plank, griddled, and wind-screened fences (Dong et al, 2007). The aerodynamic properties and sheltering effects of sand fences depend mainly on their geometric design and multiple design factors, including height, length, width, porosity, opening size/shape/distribution, and row numbers and the spacing between rows (Li and Sherman, 2015;Lima et al, 2020;Xin et al, 2021). The sheltering effect of multiple rows of sand fences is commonly considered to be more efficient than that of a single-row sand fence (Fang et al, 2018;Liu et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…In addition, early studies indicated that sand fences with sharp edges (e.g., square holes, vertical slits, or horizontal slits) have higher sand-trapping efficiencies than those with round edges (e.g., circular holes) (Richards et al, 1984). Height is another important structural parameter of sand fences and is critical for determining sand trapping efficiency and the magnitude of dune deposition (Lima et al, 2020;Ning et al, 2020;Xin et al, 2021). To trap as many transported particles as possible, fence heights usually exceed the saltation height of the wind-blown sand (Phillips and Willetts, 1979).…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic Properties and Shelter Effects of a Concrete Plate-Insert Sand Fence Along the Lanzhou-Xinjiang High-Speed Railway in Gobi Regions Under Strong Winds

Wang

Niu

et al. 2022

Front. Environ. Sci.

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The Lanzhou-Xinjiang High-Speed Railway runs through high-wind areas in the Gobi Desert, and disasters arising from the effects of blown sand critically endanger the safety of railway operations. To prevent sand deposition on the rail bed, double rows of sand fences composed of concrete columns and plates are installed on the windward side of the railway line. However, the aerodynamic properties and sheltering effects of these fences remain unclear. In this study, the effects of sand fences on boundary wind patterns and sand transport were investigated in the field and in a wind tunnel. The following results were obtained: 1) The wind velocity was efficiently reduced on the leeward side of the first and second rows of fences by 78% and 87%, respectively. Nevertheless, owing to large openings in the fence, the sand-trapping efficiencies of the first and second rows of fences on the leeward sides were only 72 and 63%, respectively. 2) The effective shelter distance (Ds) of the fence is 10 times the height of the fence; however, the horizontal distance between the two rows of fences is much larger than the Ds of the fence. This allows the wind velocity between the fences to rise above the saltation threshold once again, thereby reducing the overall sheltering effects of the double-row of fences. This study will produce a theoretical reference for improving the design and installation of blown-sand control systems in the strong-wind regions of the Gobi.

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Sediment transportation by strong winds over Gobi surfaces: Field observations along the Lanzhou–Xinjiang high‐speed railway

Wang,

Liu,

Niu

et al. 2024

Land Degrad Dev

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Under strong wind action over vast Gobi surfaces, eolian transportation can cause significant environmental problems and infrastructural damage. However, scientific understanding of the underlying mechanisms and dynamics of this process in the Gobi region remains limited. To address this gap, our study focused on investigating eolian transportation over the Gobi surface along the Lanzhou–Xinjiang high‐speed railway (LXHSR) in Northwest China, where strong winds are prevalent. The results indicate that sand transportation heights can reach 9 m in this region, with the saltation layer approximately 3–6 times higher than that of other gravel deserts. The sediment flux density over the Gobi surface exhibited an exponential decrease with increasing elevation; however, the grain‐size vertical profile in wind‐blown sand displayed an increase up to a critical altitude, followed by a decrease with height. The annual eolian transported quantity recorded in this region exceeds that of most deserts worldwide. Notably, fine sand and total suspended particulates (TSP) contributed to approximately 90% of the sediment deposited on railway tracks and drawn in by passing trains. To control transportation of these fine particles, we propose increasing the height of sand‐blocking fences within the current railway wind‐blown sand protection system from 2 to 3 m. Simultaneously, anthropogenic damage to the Gobi surface should be minimized to reduce excessive dust release. This study provides insight into the wind‐blown sand movement mechanism over the Gobi surface under strong winds, and the eolian physics parameters revealed may serve as a theoretical foundation for preventing and managing eolian catastrophes along the Lanzhou–Xinjiang high‐speed railway.

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Investigations into the design of sand control fence for Gobi buildings

Cited by 28 publications

References 30 publications

Evolution law of wind-sand flow field of multi-row reed sand barriers and optimal spacing

Evolution law of wind-sand flow field of multi-row reed sand barriers and optimal spacing

Aerodynamic Properties and Shelter Effects of a Concrete Plate-Insert Sand Fence Along the Lanzhou-Xinjiang High-Speed Railway in Gobi Regions Under Strong Winds

Sediment transportation by strong winds over Gobi surfaces: Field observations along the Lanzhou–Xinjiang high‐speed railway

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