芦苇方格沙障内部积沙形态演化的野外观测

doi:10.13304/j.nykjdb.2023.0143

中国农业科技导报 ›› 2024, Vol. 26 ›› Issue (11): 204-209.DOI: 10.13304/j.nykjdb.2023.0143

• 生物制造资源生态 • 上一篇

芦苇方格沙障内部积沙形态演化的野外观测

韦朝()

新疆铁道勘察设计院有限公司，乌鲁木齐 830011

收稿日期:2023-03-02 接受日期:2023-05-05 出版日期:2024-11-15 发布日期:2024-11-19
作者简介:韦朝 E-mail： wz1216@126.com
基金资助:
中国国家铁路集团有限公司科技研究开发计划项目(N2022G068);中国铁路乌鲁木齐局集团有限公司科技研发计划项目(WLMQ-KGHZGS-HRTLGGB-2020-0031)

Field Observation on Evolution of Sand Accumulation Pattern in Reeds Checkerboard Sand Barrier

Chao WEI()

Xinjiang Railway Survey and Design Institute Co. ，Ltd. ，Urumqi 830011，China

Received:2023-03-02 Accepted:2023-05-05 Online:2024-11-15 Published:2024-11-19

摘要/Abstract

摘要：

芦苇方格沙障作为和若铁路重要的工程固沙措施之一，其内部积沙形态的演变对芦苇方格的防沙性能有重要影响。为了解芦苇方格沙障内部真实的积沙状态，依托和若铁路建设工程，采用野外监测的手段对芦苇方格沙障内部积沙形态的演变进行为期6个月的监测。结果显示，芦苇方格沙障的积沙量分布沿着主风的方向向后移动。在风向垂直断面上，芦苇方格沙障边缘的积沙厚度要比中心位置大。整个监测时段内，芦苇方格沙障内部的积沙厚度可以用Rotion Tayor曲面函数来很好地描述，并且曲面沿着主风方向凹陷。芦苇方格沙障的结构参数、风速、风向和风速占比是塑造方格内部复杂积沙形态的主要原因。以上研究结果对野外自然状态下芦苇方格沙障内部积沙演变的认识具有重要意义。

关键词: 芦苇方格沙障, 积沙形态, 输沙, 铁路安全

Abstract:

Reeds checkerboard sand barrier（RCSB） is one of the important engineering sand-fixation measures of the Hetian-Ruoqiang railway （HRR）. The evolution of the sand accumulation morphology inside the RCSB has an important influence on its sand-control performance. In order to understand the real state of sand accumulation inside RCSB， the evolution of the sand-accumulation morphology inside the RCSB was monitored in the field experiment for a period of 6 months based on the local construction project at the HRR. The results showed that the sand particles in the RCSB moved backward along the main wind direction. The sediment thickness at the edge of the RCSB was larger than that in the center of the wind direction along the vertical section. During the monitoring period， the thickness of sand accumulation inside the whole RCSB could be well described by the Rotion Tayor surface function， and the surface was concave along the main wind direction. The structural parameters of the RCSB， wind speed， wind direction and wind percentage were responsible for shaping the complex sand accumulation patterns inside the RCSB. Above results were of great significance to the understanding of the evolution of sediment accumulation in the RCSB under the natural state in the field.

Key words: reeds checkerboard sand barrier, sand accumulation morphology, sand transport, railway safety

中图分类号:

S151

韦朝. 芦苇方格沙障内部积沙形态演化的野外观测[J]. 中国农业科技导报, 2024, 26(11): 204-209.

Chao WEI. Field Observation on Evolution of Sand Accumulation Pattern in Reeds Checkerboard Sand Barrier[J]. Journal of Agricultural Science and Technology, 2024, 26(11): 204-209.

图/表 6

图1 仪器布置A：气象站；B：插钎布置方式；C：真实的芦苇方格

Fig. 1 Instrument arrangementA：Anemometer station；B： Arrangement of insert markers； C： Actual reeds checkerboard barrier

图2 芦苇方格沙障附近位置的风速玫瑰图

Fig. 2 Wind speed rose diagram near reeds checkerboard sand barrier

图 3 芦苇方格沙障附近的风速廓线分布

Fig. 3 Wind speed profile near reeds checkerboard sand barrier

图 4 芦苇方格沙障内部沙子的粒径分布

Fig. 4 Sand particle size distribution in reeds checkerboard sand barrier

图 5 芦苇方格沙障的积沙厚度分布

Fig. 5 Sediment thickness distribution in the reeds checkerboard sand barrier

图6 芦苇方格沙障积沙形态对比A：积沙初始状态；B：最终展现的积沙形态；C：最终流向的积沙形态

Fig. 6 Comparison of sand accumulation patterns in the reeds checkerboard sand barrierA：Initial state of sand accumulation； B：Final sand accumulation pattern at horizontal direction；C：Final sand accumulation pattern at main wind direction

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芦苇方格沙障内部积沙形态演化的野外观测

Field Observation on Evolution of Sand Accumulation Pattern in Reeds Checkerboard Sand Barrier

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