水利枢纽工程基础处理技术及防渗效果分析  

Basic Treatment Technology of Water Conservancy Project and Analysis of Anti-Seepage Effect

作　　者：郑雪 王春明 ZHENG Xue;WANG Chunming(Yunnan Vocational College of Water Resources and Hydropower,Kunming 650499,China)

机构地区：[1]云南水利水电职业学院,云南昆明650499

出　　处：《河南科技》2022年第15期55-58,共4页Henan Science and Technology

摘　　要：基础渗流是引发水利枢纽工程溃坝事故的主要诱因,因此工程建设中必须要做好地质勘查,如果发现工程范围内存在破碎岩层,需要采取防渗处理,在切实提高工程基础防渗能力的同时,也能起到加固基础的作用。本研究以某水利枢纽工程为例,首先概述了工程基本情况,随后利用帷幕灌浆技术对该工程基础进行防渗处理,并重点从孔位布置、施工准备、钻孔施工、孔口封闭灌浆等方面,介绍了帷幕灌浆施工中的技术要点。最后开展了灌浆压力分析、透水率与耗灰量分析,并对帷幕灌浆质量展开检查。抽样检查结果表明,平均压水透水率为1.27 Lu,防渗效果达到理想预期。Foundation seepage is the main cause of dam failure accidents of water conservancy projects.Therefore,geological investigation must be done well in the construction of the project.If it is found that there are broken rock formations in the project scope,anti-seepage treatment is required to effectively improve the anti-seepage capacity of the project foundation.At the same time,it can also play a role in strengthening the foundation.Taking a water conservancy project as an example,this study firstly out⁃lines the basic situation of the project,and then uses the curtain grouting technology to conduct anti seepage treatment on the foundation of the project,and focuses on the layout of holes,construction prepa⁃ration,drilling construction,orifice sealing grouting,etc.,introduces the technical points in the curtain grouting construction.Finally,the grouting pressure analysis,water permeability and ash consumption analysis were carried out,and the curtain grouting quality was checked.Sampling inspection results show that the average pressure water permeability is 1.27 Lu,and the anti-seepage effect has reached the ideal expectation.

关 键 词：水利枢纽 帷幕灌浆 孔口封闭法 透水率 

分 类 号：TV223[水利工程—水工结构工程]