引水发电隧洞洞径选取的数值方法

The Numerical Method of Diameter Selection for the Hydropower Tunnel

如要选取适当的发电隧洞洞径，则要寻求在隧洞计算期内的总费用最小值，即只有当隧洞的总费用达到最小时的洞径才是最佳的，此时对应的洞径即是经济洞径。本文以某水电站引水发电隧洞为例，介绍了发电隧洞洞径选取的数值方法。

If the suitable tunnel diameter to be selected, one should seek the minimum value of the tunnel total expense in computation. Namely when the tunnel total expense is the minimum,the corresponding tunnel diameter is the best, this diameter is considered as economical tunnel diameter. A tunnel of certain hydroelectric power project is taken as example ; numerical method of diameter selection for the tunnel is introduce.