关键词: 固结灌浆, 全孔壁数字成像检测, 钻孔取芯, 声波测试, 糯扎渡水电站

Abstract:

Most of the pressure section of the diversion tunnel of Nuozhadu Hydropower Station is lower than the reservoir level, the stageⅡlining of the tunnel body was crushed under the long-term water pressure and the defect of the tunnel was formed. The construction method and technique for consolidation grouting was applied to the transition section repairing behind the service gate of the diversion tunnel on right bank, and the feasibility of construction parameters of consolidation grouting under complex conditions was proved. Meanwhile, the means of digital imaging technology of borehole-wall, borehole coring and acoustic measure were used to detect the cementing condition of concrete and surrounding rock after grouting, ensuring the scientific organization of rescue in the next stage.

Key words: consolidation grounding, digital imaging technology of borehole-wall, borehole coring, sound wave test, Nuozhadu Hydropower Station