New Cologne - railway line Rhine/Main
The underpass and the simultaneous reconstruction of the Frankfurt Cross without stopping traffic was one of the biggest challenges in the section south of the new railway line Cologne - Rhine/Main. The sophisticated design and tender planning by KREBS+KIEFER resulted in the contract for the execution phase, which included specific "client tasks" such as project and appointment coordination as well as post-contract work.
Because the construction site was expected to make as little impact on the flow of traffic as possible, the engineers at KREBS+KIEFER divided the tunnel work into several sections, continually monitoring the stability of the road above, so that the above-ground road systems remained unaffected.
The open-ended tunnel segments were built using the cut and cover method. Which is why up to 20 m long bored piles were made in the road surface. This was followed by the construction of the tunnel cover, protected by the excavation pit.
- General planning
- Design planning
- Structural Engineering
- Project management
- Tender & Contracting
- Site supervision