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Pipe Umbrella Support System

AT - Pipe Umbrella Support System

Field of application
■ Tunneling in heterogeneous, soft, or subsidencesensitive
■ Tunneling through fault zones
■ Unstable ground conditions at the working area
■ Shallow tunnels in urban areasAdvantages

Advantages AT - Pipe Umbrella System
■ Support of the tunnel wall in the region of the face
■ Distribution of loads in the longitudinal direction
■ Ground improvement ahead of the tunnel face by grouting
■ Reduction of subsidence due to ground improvement
  and load distribution
■ Drainage and ground support also by non-injected
  casing tubes