Numerical simulation on the influence of the distance between snow fence and subgrade on the snow distribution on subgrade
LIU Qingkuan1，2，3, HE Shuyong3, JIA Yaya1,2,3, LI Haifei3, FENG Yaoheng3, LI Feiqiang3
1.State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University, Shijiazhuang 050043, China;
2.Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province, Shijiazhuang 050043, China;
3.School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
Abstract：Snow fence is currently the main protection facility in road snowdrift disaster areas.Numerical simulation and field measurement were combined to study the influence of the distance between the snow fence and subgrade on the distribution of snow around the subgrade, and then the mechanism of snow deposition was analyzed.The results show that there is a good correspondence between the numerical simulation results and the field measurement results, which verifies the correctness of the results.The tendency is that as the distance between the embankment and snow fence increases, the wind speed reduction areas at the two slope toes of the embankment firstly increase，and then decrease.The shear velocity at each part of the embankment surface firstly increases, then decreases and finally increases.The most unfavorable combined distance between the snow fence with a porosity of 60% and the embankment is 16.67 times the height of the snow fence.As the distance between the cutting and the snow fence increases,it is not easy to eliminate the snow inside the cutting, so the snow fence has a poor snow-blocking effect on the cutting.The application of shear velocity can clearly judge the snow deposition and erosion on the subgrade surface.It is suggested that the method can be used to pre-judge the snow deposition and erosion on the engineering surface before building a railway in areas with frequent snowdrift disaster, which can reasonably determine the location of the snow fence in the project.
刘庆宽1,2,3，何书勇3，贾娅娅1,2,3，李海飞3，冯耀恒3，李飞强3. 防雪栅与路基间距对路基积雪分布影响规律的数值模拟研究[J]. 振动与冲击, 2021, 40(6): 227-234.
LIU Qingkuan1，2，3, HE Shuyong3, JIA Yaya1,2,3, LI Haifei3, FENG Yaoheng3, LI Feiqiang3. Numerical simulation on the influence of the distance between snow fence and subgrade on the snow distribution on subgrade. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(6): 227-234.
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