Report on behalf of CLIC Civil Engineering and Services (CES) WG

1. CTC 19 May 2009 Tunnel Cross Section Studies Report on behalf of CLIC Civil Engineering and Services (CES) WG

2. 4.5m tunnel used as baseline for 2007 costing exercise

3. Tunnel Cross Section • Original 4.5m internal diameter tunnel was developed by C.Wyss study in 2007 : CLIC-Tech-Note-003 20 August 2007

4. The tunnel diameter were initially dimensioned for the following items : • The CLIC machine, with their drive and main beam machine components. • The 2.4 GeV and 9 GeV transfer lines for the drive and main beams, respectively • An Installation corridor for the transportation of machine modules for installing and/or replacement.

5. Machine Services (1) : • Supply and return manifolds for demineralised water cooling. • Raw water supply and return. • Drainage pipe embedded in concrete invert for any water seepage • Compressed air for PETS on/off mechanism • Nitrogen distribution, if any • One or two 40mm duct(s) for optical fibre links • Two or three 500mm wide cable trays for dc power cables.

6. Machine Services (2) : • A free section of at least 70cm width by 200cm for personnel passage between a module and the tunnel wall. • One 500mm wide cable tray for low power and signal cables for the RF system • One 500mm wide cable tray for beam instrumentation, survey and vacuum systems • One 300mm wide cable tray for the power cables of the transfer lines

7. Machine Services (3) : • One 200mm wide cable tray for the cables of the vacuum and beam instrumention systems of the transfer lines • The Low-Voltage (400V) distribution • 5 Cables for Medium Voltage (36KV). These cables will bring power from Prevessin Site central Area to other sites • Secure Low Voltage Electricity • Power for the transport vehicles • No mono-rail type transport included for the moment

8. Tunnel Services : • Normal Lighting • Leaky feeder for mobile telephones • Public address system

9. Safety Systems : • Panels with emergency lighting, emergency stops, red telephones • Evacuation push-buttons (break glass type) and sirens • Emergency radio communication for fire brigade • Radiation monitors • Oxygen deficiency monitors?

10. Alignment and Tunnel tolerances • Space has been recently allocated for alignment systems • A radial allowance for construction tolerances has been included (10cm)

11. Drive beam from Turnarounds missing from this cross section !

12. What has changed since 2007 : • 3d studies with CATIA integrating services • Cooling and Ventilation studies • Transport studies • Machine developments….

13. Five machine beams in this cross section Catia Studies

14. Extract from CLIC Technical Committee : G. Riddone, D. Schulte, 2008.007.14

15. To dump Drive beam

16. Beginning Of turnaround loop End of turnaround loop Main beam

17. Transport Studies

18. 4.5m tunnel Main beam Drive beam 2 CV pipes 250mm Turnaround loop Monorail 3 cable trays 520mm 2 CV pipes 600mm Turnaround & transport Studies Safe passage Transport train Drive beam Main beam RIGHT VIEW TYPICAL CROSS SECTION CLIC TUNNEL

19. Possible Ventilation Systems for road tunnels Extracted courtesy of ‘French Tunnelling Association : AFTES : Tunnels routiers : resistance au feu Jan 2008’

20. Ventilation Concepts • Advantages of transversal ventilation : • Safety (see CLIC note from F.Corsanego EDMS 827669) • Much better control of temperature & humidity gradient along the tunnel CLIC

21. 6.0m diameter needed to accommodate 3m2 ducts !

22. Main beam Drive beam Extraction 1m2 Air supply 1m2 3 cable trays 520mm Monorail Transport train CV pipes 600 & 700mm Circuit A Safe passage CV pipes 250 & 700mm Circuit B Drive beam Main beam RIGHT VIEW TYPICAL CROSS SECTION CLIC TUNNEL – CV 2x1m2

23. CLIC WORKSHOP - 2008 COOLING AND VENTILATION IN THE TUNNEL J. Inigo-Golfin - C. Martel CERN TS/CV Wednesday 15th October 2008

24. CLIC WORKSHOP - Ventilation Tunnel section SUPPLY DUCT EXTRACTION DUCT Circuit C : Fire Fighting Circuit B : general cooling Circuit D : compressed air Circuit A : Module cooling

25. CLIC WORKSHOP - Ventilation Safety considerations Extraction Air supply Extraction Air supply SHAFT POINT • Control of the pressure from both ends of a sector. • Control of the pressure (overpressure or underpressure in each area). • Fire detection per sector compatible to fire fighting via water mist.

26. CLIC Cooling Study • Proposed 1.5m diameter micro-tunnel for Cooling Pipes : • Approx. cost for CE works 250MCHF • Intermediate caverns would be needed for construction of micro tunnel • Integration for cooling pipes is complicated • Major impact on civil planning (excavated spoil through ‘completed’ structures) J.Osborne

27. Drive beam from Turnarounds missing from this cross section ! 4.5m tunnel

28. Drive beam from Turnarounds missing from this cross section ! 5.0m tunnel

29. Herrenknect Visit June 2008 Herrenknect are one of the worlds biggest TBM manufacturers. They advised that the most common diameter for TBM’s (metro etc) is 5.6 finished internal diameter.

30. Cross Section Studies 4.5m compared to 6.0m diameter

32. 5.6m tunnel

33. Summary • With a 4.5m diameter tunnel, it appears difficult to accommodate all equipment • 5.6m recommended by CES working group • More TBM’s of this diameter available will help with Project planning • Reduction in other costs due to more additional working space ? Space for future requests…. • Additional CE cost in the region of 150M CHF Barcelona Metro under construction 6.6m machine external, inner 5.8m. With 0.1m tolerance on radius = 5.6m internal diameter.