硅粉混凝土修补技术在群昌水库输水洞混凝土剥蚀破坏修补中的应用

The application of Silica fume concrete repair technology in Qunchang reservoir water supply tunnel

群昌水库由于经常高水位运行,使输水洞混凝土表面长期受到高速水流气蚀冲刷及冻融破坏,致使混凝土表面剥蚀、脱落、钢筋外漏锈蚀等破坏现象。结合凝土表面破坏现状,通过对修补材料的比选,确定采用硅粉混凝土修补液对竖井段和消力池段进行修补的反感方案。经过8年的运行,证明实际效果良好。

Qunchang reservoir run due to frequent high water level,so that the concrete surface of the water conveyance tunnel has been damaged by a high-speed water flow cavitation erosion and freeze-thaw during long time,which results concrete surface erosion,shedding,reinforced bar exposed and rusty.Combined with the concrete surface damaged status,by comparison and selection of repair materials,the silica fume concrete repair solution was used to repair the shaft segment and stilling basin.After eight years of running,it proves that method is practical and has a good effect.