The supporting system of self-drilling soil-nail with sealing wall made by SMW construction machine,is discussed through foundation pit of Xuanwu Lake tunnel project.

• 南京玄武湖隧道工程垂直支护段采用自钻式土钉与SMW机械施工止水帷幕相结合复合土钉支护技术,本文介绍了该技术的设计、施工方法,并结合现场试验分析了其受力及变形机理。