集束可控高喷防渗墙技术在洞庭湖区堤防加固应用试验研究  

Application of concentrative and controllable high-pressure cut-off wall in the reinforcement of embankments in Dongting lake area

作　　者：王导勇 谢为江 郑建平 刘达 WANG Daoyong;XIE Weijiang;ZHENG Jianping;LIU Da(Hunan Water Resources and Hydropower Survey,Design,Planning and Research Co.,Ltd.,Changsha Hunan,410007,China;Jiangxi Academy of Water Science and Engineering,Nanchang Jiangxi,330029,China;Jiangxi Zhongheng Underground Space Technology Co.,Ltd.,Nanchang Jiangxi,330000,China)

机构地区：[1]湖南省水利水电勘测设计规划研究总院有限公司,湖南长沙410007 [2]江西省水利科学院,江西南昌330029 [3]江西中恒地下空间科技有限公司,江西南昌330000

出　　处：《江西水利科技》2024年第4期262-267,共6页Jiangxi Hydraulic Science & Technology

基　　金：江西水利科技项目(202324YBKT04、202425TGKT01).

摘　　要：集束可控高喷防渗墙施工技术与传统高喷工艺相比,其地层适应能力更强,成墙质量更可靠,与其他工艺相比,其在砂卵石地层且堤顶宽度狭窄时有明显优势。为了更好地解决洞庭湖区深厚砂卵石层和堤顶施工场地受限等问题,拟引入江西省水利科学院研发的该项新技术。本次试验研究旨在进一步验证集束可控高喷防渗墙技术在洞庭湖区的适应性,通过试验获取关键技术参数,为后续大面积应用提供技术依据。试验研究表明:与其他传统工艺分析对比,该工艺所建造的防渗墙不存在开叉、漏喷、沉渣、断墙等质量缺陷,质量保证度高,施工作业面占用宽度相对较小,适应能力强,工效快,成本低,弃浆弃渣排放少,无塌槽塌孔风险,技术工艺优势明显,可在洞庭湖区推广使用。Concentrative and controllable high-pressure cut-off wall is a new type of high-pressure jet grouting construction method that combines long spiral drilling with traditional high-pressure jet grouting technology.Compared with traditional high-pressure jet grouting technology,it has stronger geological adaptability and more reliable wall quality.Compared with other technologies,it has obvious advantages in sandy gravel formations and narrow embankment top widths.In order to better solve the problems of deep sand and gravel layers,as well as the limited construction sites on the top of embankments in the Dongting lake area,this new construction method developed by Jiangxi Academy of Water Science and Engineering is introduced in the study.Aimed at further verifing the adaptability of the concentrative and controllable high-pressure cut-off wall in the Dongting lake area,this study provides technical basis for subsequent large-scale applications by obtaining key technical parameters.The results showed that compared with other traditional technologies,the cut-off wall constructed by this method does not have the quality defects such as forks,leakage jetting,sedimentation,and broken walls.Meanwhile,it also has the technical advantages of high quality assurance,relatively small width of work surface,strong adaptability,fast work efficiency,low cost,less discharge of slurry and slag,no risk of collapse of grooves and holes,which can be used and promoted in the Dongting lake area.

关 键 词：防渗墙 高喷 长螺旋 集束可控 

分 类 号：TV543.82[水利工程—水利水电工程]