浅析银江水电站F_(24)、f_(143)断层破碎带帷幕灌浆施工技术  

Construction Technology of Curtain Grouting Construction in the F_(24) and f_(143) Fault Fracture Zones of the Yinjiang Hydropower Project

作　　者：李波 严瑞平 周绍冰 LI Bo;YAN Ruiping;ZHOU Shaobing(Panzhihua China Resources Hydropower Development Co.,Ltd.,Panzhihua Sichuan 617000)

机构地区：[1]攀枝花华润水电开发有限公司,四川攀枝花61700

出　　处：《四川水力发电》2025年第1期53-56,共4页Sichuan Hydropower

摘　　要：银江水电站5号、6号坝段建基面开挖时揭露出顺河向断层F_(24)、f_(143),其断层破碎带性状差,透水性强,压水试验不起压,个别部位存在承压水,对坝址区渗漏及渗透稳定影响较大。针对断层区帷幕灌浆施工过程中主要存在的孔底沉渣严重、涌水量大、吸浆量与灌前压水成果不匹配、芯样获取率低等问题,通过更换浆液配比、调整灌浆方式、加注特殊材料等措施解决了现场施工存在的问题,达到了质量检测合格的要求。结合银江水电站断层破碎带现场帷幕灌浆施工实例,对施工过程中存在问题产生的原因进行了分析,提出了具有针对性的技术方案和措施并予以实施,取得了较好的成果。The excavation of the foundation face of the No.5 and No.6 dam sections of Yinjiang Hydropower Project revealed that the faults F_(24) and f_(143) along the river direction,the fault fracture zone has poor characteristics,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,adjusting 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 

分 类 号：TV7[水利工程—水利水电工程] TV51TV52