Analysis on Impact of River Bottom Membrane Bag Sand on River Flood Discharge Based on MIKE21
In order to analyze the impact of river bottom membrane bag sand on the river flood discharge during the construction period of the Ningwu Railway Tunnel undercrossing Qinhuaixinhe River,the MIKE21 is used to build the hydrodynamic model to numerically simulate the flow field of river in the engineering section,and to analyze the impact of membrane bag sand on river water level,flow velocity and flow direction.The results show that the impact of upstream water level backwater caused by membrane bag sand is limited.The changes in river flow field are mainly limited to the vicinity of the tunnel.The flow velocity increases,and the flow direction changes little.On the whole,the overall flow regime in the engineering section during the construction is smooth,and the membrane bag sand has little impact on river flood discharge safety.The analysis results can provide some technical references for the design,construction and flood control evaluation of the Ningwu Railway Tunnel.
membrane bag sandMIKE21backwaterflood discharge impactQinhuaixinhe River
NETL
NSTL
万方数据
