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中国沙漠 ›› 2024, Vol. 44 ›› Issue (3): 42-50.DOI: 10.7522/j.issn.1000-694X.2023.00136

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格库铁路芦苇把栅栏和大网格防沙体系防护效益

丁录胜()   

  1. 新疆铁道勘察设计院有限公司,新疆 乌鲁木齐 830011
  • 收稿日期:2023-08-30 修回日期:2023-10-08 出版日期:2024-05-20 发布日期:2024-06-11
  • 作者简介:丁录胜(1965—),男,高级工程师,甘肃甘谷人,主要从事铁路设计及风沙防治研究。E-mail: dingls65@163.com
  • 基金资助:
    中国铁路总公司科技研究开发计划课题(2017G004-E)

Observation and numerical simulation of the protective effect of the reed-bundle sand control system along the Golmud-Korla Railway

Lusheng Ding()   

  1. Xinjiang Railway Survey & Design Institute Co. ,LTD,Urumqi 830011,China
  • Received:2023-08-30 Revised:2023-10-08 Online:2024-05-20 Published:2024-06-11

摘要:

通过野外观测和数值模拟,对格库铁路米兰戈壁区段芦苇把栅栏和大网格防沙体系防护效益进行了研究。结果表明,单排芦苇把阻沙栅栏后2~14H(H,栅栏高度,2 m)范围内最大防风效率(风速衰减比)可达86%,阻沙效率(输沙通量衰减比)91.8%~96.8%;双排阻沙栅栏最大防风效率变化不大,但阻沙效率增大到98%,经大网格带后阻沙效率提高到99.7%。风沙流经防沙体系后,平均粒径显著减小,由240 μm变为72~109 μm,分选性趋于变好。实测和模拟得出,两道50%孔隙度芦苇把阻沙栅栏和两个大网格(4 m×4 m×0.8 m)组成的防沙体系能够起到较好的风沙防治效果,且工程造价相对较低。该防护体系适用于格库铁路戈壁大风区风沙危害防治。

关键词: 防沙体系, 芦苇把栅栏, 防护效益, 格库铁路

Abstract:

In this study, the evaluation of the sand control efficiency of the reed bundle sand control system in the gobi region of Milan section of Golmud-Korla Railway, Southern Xinjiang, China was carried out through field observation and numerical simulation. The results show that the sand-control systems consisting of two reed bundle fences and a 40 m long belt of large reed checkerboard (4 m×4 m×0.8 m) have a good effect on controlling damages caused by the gobi wind-blown sand. The maximum windproof efficiency (wind speed attenuation ratio) in the range of 2-14H (H, fence height, 2 m) after a single row reed bundle sand fence reached 86%, and the sand blocking efficiency (attenuation ratio of sand flux) ranged between 91.8% and 96.8%. The maximum wind protection efficiency of the double-row sand fence was almost unchangeable, and the sand blocking efficiency increased to 98%, while the sand blocking efficiency increased to 99.7% as wind-blown sand flux flowing over the belt of large reed checkerboard. Moreover, as the wind-blown sand flux flowed over the sand control system, the average particle size was significantly reduced from 240 μm to 72-109 μm, and the sorting tended to become better. The measured and simulated results show that the sand control system composed of two reed-bundle sand fences with 50% porosity and two large reed-bundle grids (4 m×4 m×0.8 m) can play a good role in sand control, the project cost is relatively low, and the protection system can be applied to the control of sand damage in the gobi wind area of Golmud-Korla Railway.

Key words: sand-control system, reed-bundle sand fence, protective effect, Golmud-Korla Railway

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