Design and construction of tunnels in Lot A of the highspeed rail link Cologne-Frankfurt

摘要

The twin-track tunnels of the high-speed railway line between Cologne and Frankfurt on Main with their large excavation section of up to 160 m~2 and shallow cover posed great challenge for contractors and designers. The paper describes the geotechnical problems and their solutions during the design and construction of the six tunnels in the north section of the alignment. The paper also touches on issues relevant to the design-build practice in the project.