Inspeksjon av kummer, Sandfang (BLIX)

Kommentar:
Maintenance shall be performed according to list of less critical
and more critical areas. A preliminary list of less critical and more
critical areas can be found in the FMECA report. Maintenance routine
and interval cannot be finalized until the results from the flushing
process and testing of tablets for the drainage system are ready.

As the drainage system is different than other drainage systems
used in railway tunnels today, generic routines cannot be used.
Therefore, experience from testing of tablets and flushing is critical.

 
Dok.ref:
 Specific areas should be detailed when new information is available, but the areas identified so far are:

- Manholes in CPs except from CP Km 4.1450, CP Km 10.6620, CP Km 11.1420, CP Km 12.3550, CP Km 12.8350, CP Km 13.3150, CP Km 18.1150 and CP Km 19.0750.

- Manholes in TBM tunnels, TBM tunnels, Escape Tunnel, RA and Access tunnels.

According to UFB-30-Q-65503_rev.01E The Follo Line project, EPC TBM. FMECA report for the Drainage System ¿[R4]:

- Section 5.3. Overview of preventive maintenance activities with 

optimized intervals.