摘要
西北漫流区铁路桥涵在雨季易发生冲刷灾害的问题,对铁路的正常运营构成威胁。基于西北地区铁路桥涵冲刷的实际情况,通过缩尺试验、Fluent数值模拟相结合的方法,对西北漫流区铁路通洪小桥涵冲刷机理进行分析,并提出了相应的消能优化措施。结果表明:3种消能方式中三级挑坎式通洪效果最好,波浪式次之,挑流式最差;在消能效果方面挑流式最好、波浪式次之、三级挑坎式相对较差。西北漫流区铁路桥涵采用三级挑坎后铺设一定长度的铺砌能够有效地改善水流形态,减少局部冲刷。
The problem that railway Bridges and culverts in the northwest overflow area are prone to erosion disasters during the rainy season poses a threat to the normal operation of the railway.Based on the actual situation of railway bridges and culverts in Northwest China,this study analyzes the scouring mechanism of railway flood bridges and culverts in the Northwest Flood Area by combining scaling experiment and Fluent numerical simulation,and proposes corresponding energy dissipation optimization measures.The results show:among the three energy dissipation methods,the three-level ridge type has the best flood effect,followed by the wave type,and the flow type is the worst.In terms of energy dissipation effect,the flow type is the best,the wave type is the second,and the three-level challenge type is relatively poor.In addition,laying a certain length of pavement after the three-stage ridge can effectively improve the water flow form and reduce local erosion.
作者
熊利锋
王成斌
李盛
王顺平
秦龙
XIONG Lifeng;WANG Chengbin;LI Sheng;WANG Shunping;QIN Long(Institute of Soil and Water Conservation of Gansu Province,Lanzhou730020,China;Civil Engineering Department,China Railway LanzhouGroup Co.,Ltd.,Lanzhou730030,China;School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou730070,China)
出处
《兰州工业学院学报》
2025年第5期74-79,共6页
Journal of Lanzhou Institute of Technology
基金
国家自然科学基金(72261024)
甘肃省交通运输厅科技项目(2024-31)
甘肃省科技计划资助项目(23ZDF)
甘肃省重点人才项目(2023RCXM27)
甘肃省教育厅高等学校产业支持计划项目(2022CYZC-32)。
关键词
漫流区
冲刷深度
试验研究
铁路桥涵
数值计算
自由出流
floodplain
scour depth
experimental study
railway bridge and culvert
numerical calculation
free outflow
