Tunnel Cross Section Studies CES 8 July 2009 Tunnel Cross Section Studies

4.5m tunnel used as baseline for 2007 costing exercise

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

CTC 19 May Proposal : 5.6m tunnel 2270mm

Further to CTC of 19 May : Drain reintroduced into tunnel invert to collect any water ingress from surrounding rock 3 ‘missing’ cable trays re-introduced Machine height for installation reduced to 2100mm (from 2270 = -170mm) Transport studies advanced with new machine details Local tunnel enlargements proposed where turnaround re-enters the main Linac Transversal ventilation has been retained for this study, pending CTC decision

Option B selected for this study

4.5m tunnel Machine height reduced, but still a conflict

Catia Studies Could re-position the tunnel enlargement to where the turnaround re-enters the Main Linac Catia Studies

4.5m tunnel Tunnel enlarged at Turnarounds

4.5m tunnel Move transfer lines to side of tunnel ?

BACK-UP slides

Five machine beams in this cross section Catia Studies

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

To dump Drive beam

Beginning Of turnaround loop End of turnaround loop Main beam

Transport Studies

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

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

CLIC 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

6.0m diameter needed to accommodate 3m2 ducts !

TYPICAL CROSS SECTION CLIC TUNNEL – CV 2x1m2 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

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

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.

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

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.

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

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

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

5.6m tunnel

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.