摘要
Abstract
The excavation of the foundation face of the No.5 and No.6 dam sections of Yinjiang Hydropower Project revealed that the faults F24 and f143 along the river direction,the fault fracture zone has poor characteris-tics,strong permeability,no pressure in the pressurized water test,and confined water in some parts,which has a great impact on the leakage and permeability stability of the dam site area.In view of the problems of serious sediment in the hole,large water inflow,mismatch between the grouting amount and the results of pressurized water before filling,and low core sample acquisition rate in the process of curtain grouting construction in the fault area,the problems existing in the on-site construction were solved by replacing the grouting ratio,adjus-ting the grouting method,and adding special materials,so as to meet the requirements of quality inspection.Combined with the example of curtain grouting construction in the fault fracture zone of Yinjiang Hydropower Project,this paper briefly analyzes the causes of the problems existing in the curtain grouting construction process of the fault fracture zone,and puts forward targeted technical solutions and measures based on the site situation,achieving good results.关键词
断层破碎带/帷幕灌浆/孔底沉渣/涌水/压水试验/银江水电站/施工技术Key words
Fault fracture zone/Curtain grouting/Sediment at the bottom of the hole/Water gushing/Pressur-ized water test/Yinjiang Hydropower Project/Construction technology分类
建筑与水利
