针刺法化学灌浆技术在地下隧洞衬砌接缝止水缺陷修补中的应用  

Application of Needling Chemical Grouting Technology in Sealing Defect Repairing of the Lining Joints of Underground Tunnels

作　　者：屈高见 田科宏 Qu Gaojian;Tian Kehong(Investigation and Design Institute of Sinohydro Bureau 3 Co.,Ltd.,Xi'an,Shaanxi 710016,China)

机构地区：[1]中国水利水电第三工程局有限公司勘测设计研究院,陕西西安710016

出　　处：《中国建筑防水》2021年第7期41-44,共4页China Building Waterproofing

摘　　要：根据兰州水源地工程隧洞特点开发了针刺法化学灌浆技术,通过专用灌注针头穿刺橡胶止水垫进行化学灌浆。施工时,灌浆材料通过钢针内部的孔注入到橡胶止水垫背面,形成一道弹性防水,达到封堵漏水、修补缺陷的目的,且对管片无损、可有效缩短工期、避免材料浪费与环境污染。灌浆施工后的隧洞管片接缝渗漏全部消失,满足了隧洞通水条件。According to the tunnel characteristics of Lanzhou water source project,needling chemical grouting technology is developed,and carries out by special grouting needle puncturing on rubber sealing pad.During construction,the grouting material is injected into back of the rubber water-stop pad through the hole inside steel needle to form an elastic waterproofing layer,so as to achieve the purpose of plugging water leakage and repairing defects,without damage to the segment,effectively shorten the construction period,avoid material waste and environmental pollution.After grouting construction,the leakage of tunnel segment joints disappears completely,which meets the water supply conditions of the tunnel.

关 键 词：针刺法化学灌浆 盾构管片 接缝 橡胶止水垫 针头 

分 类 号：TV67[水利工程—水利水电工程] TV543.2