Design calculation sheet of a power generation diversion tunnel
According to the original xxx design, the power generation and water diversion system is arranged on the right bank, with a design quotative flow of 57m3/s. The power generation diversion tunnel is connected to the pressure forebay, which is directly connected to the powerhouse (equivalent to the riverbed powerhouse). The reference tunnel for power generation is a non pressure tunnel, designed as an automatic regulating channel (i.e. the forebay is not provided with an overflow weir), with an axis azimuth of N73.24 ° E. The tunnel length L=450m, bottom slope i=1/2000, the inlet tunnel bottom elevation 405.3m, and the outlet tunnel bottom elevation 405.07m. The tunnel section is of round arch straight wall type (city gate tunnel type), and the section size after lining is B × H=5.5 × 8.188m (straight wall height 6.6m).