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- Title
Study on Design of Mechanical Sand Prevention Measures in Different Sand Damage Areas Along Railway.
- Authors
LI Xuanmin; XIN Guowei; SONG Yanhong; ZHANG Jie; HUANG Ning
- Abstract
In order to solve the hazard of wind-sand for railways in desert, the corresponding mechanical sand prevention measures were designed. This paper took Etuokeqianqi-Shanghaimiao Railway as the research background, based on the field measurement of the wind speed and sediment transport in the area of moderate and severe sand damage, a three-dimensional numerical simulation study on the sand barrier setting and optimization to meet the needs of sand control were carried out, and the measures were verified by the wind tunnel experiment. The results show that, the amount of flowing sand in the moderate sand damage area is less and the sand-prevention efficiency is high, and the combination of single sand barrier and straw checkerboard barrier on its leeward side can meet the needs of sand control. In the serious sand damage area, there is a large amount of flowing sand and the sandprevention efficiency of single sand barrier is reduced, so it is necessary to set double sand barrier and straw checkerboard barrier together to meet the needs of sand prevention. The main conclusions are as follows: (1) The sand-prevention efficiency of a single 30% porosity sand barrier and 10m straw checkerboard barriers can reach 60%, which can meet the needs of sand control in the area. (2) The sand-prevention efficiency of double sand barriers and 10m straw checkerboard barriers can reach 62%, which can meet the needs of sand prevention in the serious sand damage area. (3) The reasonable distance between double sand barriers should be 10H, and the reasonable distance between 10m straw checkerboard barriers and double sand barriers should be 15H in the serious sand damage area. The results indicate that the sand-prevention efficiency is affected by many factors in the actual setting of sand barrier. The width of straw checkerboard barrier can be appropriately increased, and the design allowance of sand-prevention efficiency can be increased to reduce the influence of wind sand.
- Subjects
WIND speed measurement; FREIGHT trucking; LONG-span bridges; EXPERIMENTAL design; WIND tunnels; SEDIMENT transport
- Publication
Railway Investigation & Surveying, 2023, Vol 49, Issue 4, p82
- ISSN
1672-7479
- Publication type
Article
- DOI
10.19630/j.cnki.tdkc.202211260001