1994 Volume 4 Pages 423-428
single-track railway tunnel with old brick lining. The work was to install the new lining instead of the brick lining after increasing the height of the cross section by 80cm was performed during 270 minutes of the train service interval at night.
The ground around the tunnel was loose terrace deposit with high water content, Furthermore the new lining had to be the final support. The authors used an improved load header for smooth excavation and introduced “A NEW Support System”, which consisted of steel rib with hight-performance precast concrete plate and thixotropical special light weight mortar as backfill material.
