摘要
在铁路建设过程中,突涌水风险日益成为最严重最频繁的水文风险.针对突涌水从隧道口涌出后形成的地表径流,利用HEC-RAS水文模型对径流的排放演变规律进行模拟.水文模型模拟结果表示,隧道涌水径流的流速显示出上下波动的变化趋势,在径流末段平均流速为6.16 ft/s,流速较慢,在隧道口流速最快,最大值达到18.04 ft/s.径流的流动面积最大值出现在径流中段.同时,径流的水面宽度与流速和流动面积呈现出相同的变化趋势,水面宽度从隧道口涌出后先增加后减少,最大值出现在2号横断面.
In the process of railroad construction,the risk of sudden surge of water is increasingly becoming the most serious and frequent hydrological risk.In this paper,for the surface runoff formed after the sudden surge of water from the tunnel entrance,the HEC-RAS hydrological model is used to simulate the evolution of the discharge pattern of the runoff.Hydrological model simulation results indicate that the flow velocity of tunnel surge water runoff shows the trend of up and down fluctuations,the average flow velocity at the end of the runoff section is 6.16 ft/s,the flow velocity is slow,in the tunnel mouth flow velocity is the fastest,the maximum value reached 18.04 ft/s.The maximum flow area of the runoff appears in the middle section of the runoff.At the same time,the water surface width of runoff showed the same trend with the flow velocity and flow area,the water surface width increased first and then decreased after the emergence from the tunnel mouth,and the maximum value appeared in cross section No.2.
作者
李琦
杨旭
由丹丹
刘威
Li Qi;Yang Xu;You Dandan;Liu Wei(Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University)
出处
《哈尔滨师范大学自然科学学报》
CAS
2021年第6期71-76,共6页
Natural Science Journal of Harbin Normal University
基金
国家自然科学基金(71942006)
哈尔滨师范大学研究生创新项目(HSDSSCX2021-19)。
