多诺水电站重建放空洞渗漏涌水封堵技术研究

Study on Leakage and Gushing Sealing Technology for theReconstructed Venting Tunnel of Duonuo Hydropower Station

重建的多诺水电站放空洞上平段钢衬背后出现渗漏现象,对上、下弯段的施工及洞室稳定造成不利影响。采用沉箱引排形成盖重再灌注特种材料的方法实现了封堵目标。系统叙述了封堵施工的情况以及渗漏水封堵后取得的效果。

Leakage occurs behind the steel lining of the upper flat section of the reconstructed venting tunnel of Duono Hydropower Station,which has an adverse impact on the construction of the upper and lower curved sections and the stability of the tunnel.Caisson drainage is applied to form cover weight first followed by grouting of special material to seal the leakage.This paper systematically describes the construction of sealing and the sealing effect of water leakage.