导流洞进口残埂对过流能力的影响数值模拟研究

Numerical Simulation Study on the Influence of Residual Residues in the Diversion Tunnel on the Capacity

施工导截流是目前水利工程施工中最常用的方法,该方法是使水利工程能够在干地面上施工且保证后期工程开展的关键技术,对于导流洞进口残埂一般在修建水利建筑物后予以拆除。为研究导流洞进口残埂对过流能力的影响,采用Flow-3d软件以某实际工程为基础建立数学模型,研究导流洞进口残埂对导流洞进口水位和流速的影响。结果表明,随着导流洞进口残埂围堰高度的增加,相对进口水位就越高,且进口流速也随之增加,尤其是在围堰残埂处值为9 m/s,这也进一步降低过流的能力。因此,导流洞进口围堰残埂对导流洞的进口流速和水位有一定的影响。建议在下游截流时拆除,以保证导流洞进口流速和水位相对稳定。

Construction diversion is the most commonly used method in the construction of water conservancy projects. This method is a key technology to enable water conservancy projects to be constructed on dry ground and to ensure the subsequent development of the project. The diversion tunnel inlet residues are generally given after construction of water conservancy buildings Demolition,in order to study the influence of the diversion tunnel inlet residue on the flow capacity,this paper mainly uses Flow-3 d software to build a mathematical model based on an actual project to study the diversion tunnel inlet residue to the diversion tunnel inlet water level and velocity. influences. The results show that as the height of the cofferdam at the inlet of the diversion tunnel increases relative to the inlet water level and the velocity of the inlet also increases,especially at the cofferdam residual value,which further reduces the ability of overcurrent. Therefore,the residual cofferdam of the diversion tunnel has a certain effect on the inlet velocity and water level of the diversion tunnel. It is recommended to remove the diversion tunnel to ensure that the inlet velocity and water level of the diversion tunnel are relatively stable.