Civil Engineering Reference
In-Depth Information
The existing Piccadilly Line Eastbound Tunnel experienced 3 to 5 mm
vertical displacement in the crown, and 5 to 7 mm horizontal displacement
at axis level directed towards the SCL Eastbound Stub, indicating a clear
ovalization. All displacements were limited to the crown and the side of the
lining where the SCL Eastbound Stub passed by (Figure 8.15).
a)
b)
Figure 8.13
a) Existing Piccadilly Line tunnels, SGI-Segments (LHS), Concrete
Segments (RHS), b) existing Piccadilly Line Eastbound Tunnel,
stalactites on the SGI-Segments
