三峡工程二期围堰拆除方式与三期截流关系研究

Influence of removal mode of second-stage cofferdam on TGP's third-stage river closure and retaining generation

阐述了三峡工程二期围堰拆除范围及形式对三期截流的影响。探讨了截流流量Q=9010～10300m3/s时,最大限度满足三期截流需要的二期围堰拆除范围及形式,并探讨了在此拆除情况下,三期导流及三期RCC围堰挡水发电期二期上游围堰拆除范围处的水力学条件。

This paper summarizes the influence of the removed range and configuration of the second?stage cofferdam on the TGPs third?stage river closure. The removal range and form were studied to meet the reqirements of the third?stage river closure for the discharges from 9 010 m3/s to 10 300 m3/s. The hydraulics parameters in original upstream cofferdam?area in third?stage diversion and the influence of this removal scheme on the operation of hydraulic structures in RCC cofferdam?retaining generation period are analysed.