The Technique of Shield Tail Brush be Repaired Inside During Long Tunnel Building

The shield tunnel be abroad application in the subway engineering in China by it's advantage of superior quality,construction safety,building speediness, small effect to environment etc. But the weakness of the easy damage and difficult repaired of shield tail brush restrict the shield long advance. How to repair the shield tail brush inside tunnel is one of the key techniques of long tunnel building. The article summarizes the experience of success repaired shield tail brush inside tunnel in the Guangzhou subway No.3 line construction process, has reference value to similar engineering.