铁道标准设计2018，Vol.62Issue(4)：62-67,6.DOI:10.13238/j.issn.1004-2954.201705080003
沙漠地区道路涵洞周围流场规律及积沙特征研究
Study on Flow Field around Culvert of Desert Road and Characteristics of Sand Accumulation
摘要
Abstract
The culvert is one of the important parts in road engineering and an important infrastructure to ensure the safety of the road. Because the desert culvert is more prone to wind-sand disaster, it is necessary to carry out a systematic and comprehensive research on it. The three-dimensional numerical simulation of the culvert under different inflow velocity and direction is carried out to compare and analyze sand accumulation characteristics around the culvert under different wind speed and different inflow direction. And relevant conclusions are summarized. Research findings and conclusions show that the comparison of the characteristics of the flow field under different flow direction demonstrates that when the angle between the flow and the culvert is 20 degree,the influence of the culvert on the flow field is maximum;there is a large area of the speedup region before the hole and velocity decreases most rapidly after the hole. The comparison of highway culvert sediment accumulation rule under different wind speed and direction shows that with the increase of wind speed, the sand accumulation in front of the culvert increases and then decreases. The sand accumulated inside the highway culvert increases with the increase of wind speed, and the sand accumulated after the hole increases significantly with the increase of wind speed. At the same wind speed, the sand accumulated before the hole increases with the increase of angle, and the greater the angle, the more obvious the sand sideway before the hole; after the hole the sand accumulation decreases with the increase of angle.关键词
道路工程/积沙特征/数值模拟/道路涵洞/流场规律/沙漠道路Key words
Road engineering/Sediment accumulation characteristics/Numerical simulation/Road culvert/Flow field law/Desert road分类
交通工程引用本文复制引用
智凌岩,程建军,王连,辛林桂..沙漠地区道路涵洞周围流场规律及积沙特征研究[J].铁道标准设计,2018,62(4):62-67,6.基金项目
国家自然科学基金应急管理项目(51641808) （51641808）
国家自然科学基金地区项目(51568057,51268050) （51568057,51268050）
