Abstract:  The 397th ring segment of the right line of the Wangjing tunnel of the BeijingShenyang highspeed railway was penetrated by piling. To guarantee the normal construction and operation of the tunnel, the tunnel clearance, structural safety, and waterproof, especially the safety of 110 kV high piezoelectric iron tower adjacent to the surface, a comprehensive comparison among three repairing schemes is conducted for the shield tunnel. A series of repairing techniques such as temporary steel frame support and welded segment to tighten the channel steel, isolation pile construction on ground, fullsection highpressure jet grouting pile and surface tracking compensation grouting, and auxiliary vertical shaft excavation to completely repair the concrete structure and waterproof of damaged segments have been employed, which successfully repaired the damaged segments adjacent to high piezoelectric iron tower with various difficulties such as narrow space, large formation water inflow, strict settlement and deformation requirements, high safety risk and difficult construction.

Key words: shield tunnels, segment, broken down, vertical shaft, isolation pile, high pressure jet grouting pile