The construction time of TBM (Tunnel Boring Machine) depends on multiple factors, including the length of the tunnel, geological conditions, equipment performance, and the experience of the construction team. Specifically:
1. * * Assembly outside the hole * *: It will take approximately 3 months. This stage may be affected by factors such as weather, especially during the rainy season.
2. * * Sliding into the tunnel * *: It will take approximately 20 days. This stage includes sliding the TBM into the tunnel and conducting necessary assembly and debugging.
3. * * Excavation * *: This is the main stage of TBM construction, and the time will vary depending on the length of the tunnel and geological conditions. For example, in the CCS project in Ecuador, the maximum daily footage during TBM1 construction reached 27 rings (48.6 meters), and the entire excavation process took 2 years and 6 months.
4. * * Sliding out of the hole * *: The duration of this stage is relatively short, usually between a few days to a few weeks.
5. * * Demolition outside the hole * *: This stage also takes relatively short time, usually completed within a few weeks.
In summary, the total time for TBM construction can range from several months to several years, depending on the scale and complexity of the project.
