In order to improve the anti-seepage effect of the cofferdam project of the Ghana Bui Hydropower Station,grouting is used for anti-seepage reinforcement.Combined with engineering experience,it is proposed to use high-pressure rotary jet grouting for grouting reinforcement.Comprehensively considering the results of high-pressure jet grouting of the entire cofferdam,the average unit consumption is 543.25 kg/m,of which the average unit consumption of the first-order holes and the second-order holes are 639.22 kg/m and 429.43 kg/m respectively.After the anti-seepage grouting construction of the first-order holes,the large leakage channels in the earth-rock cofferdam were basically blocked,and the high-pressure rotary jet grouting of the second-order holes was able to return grout normally,meeting the predetermined anti-seepage reinforcement requirements.
维普
万方数据