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Wind and Structures Volume 22, Number 5, May 2016 , pages 555-571 DOI: https://doi.org/10.12989/was.2016.22.5.555 |
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Effect of hanging-type sand fence on characteristics of wind-sand flow fields |
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Jian-jun Cheng, Jia-qiang Lei, Sheng-yu Li and Hai-feng Wang
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| Abstract | ||
| A hanging-type sand-retaining wall is a very common sand-blocking fence structure used to prevent sand movement. This type of wall is widely used along the Qinghai–Tibet and Gobi desert railways in Xinjiang, Western China. To analyze the characteristics of wind-sand flow fields under the effect of such a sand fence structure, a wind tunnel test and a field test were carried out. The wind tunnel test showed the zoning characteristics of the flow fields under the effect of the hanging-type sand-retaining wall, and the field test provided the sediment transport data for effective wind-proof interval and the sand resistance data in the front and behind the sand-retaining wall. The consistency of the wind-sand flow fields with the spatial distribution characteristic of wind-carried sand motion was verified by the correspondences of the acceleration zone in the flow field and the negative elevation points of the percentage variations of the sand collection rate. The spatial distribution characteristic of the field sand collection data further showed the spatial structural characteristic of the sandy air currents under the action of the hanging-type sand-retaining wall and the sand resistance characteristic of the sand-retaining wall. This systematic study on the wind-sand flow fields under the control of the hanging-type sand-retaining wall provides a theoretical basis for the rational layout of sand control engineering systems and the efficient utilization of a hanging-type sand-retaining wall. | ||
| Key Words | ||
| wind-sand environment; wind-sand disaster; hanging-type sand-retaining wall; wind-sand flow fields; wind-blown sand prevention and control | ||
| Address | ||
| Jian-jun Cheng: Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang, 830011, China; College of Water Resources and Architectural Engineering, Shihezi University, Shihezi Xinjiang 832003, China Jia-qiang Lei, Sheng-yu Li and Hai-feng Wang: Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences,Urumqi, Xinjiang, 830011, China | ||