FCC Civil Engineering John Osborne Jo Stanyard SMB

FCC Civil Engineering John Osborne & Jo Stanyard (SMB - Site Engineering - FAS Section) FCC Workshop FIML-CERN 3 rd May 2017

Summary from 7 th March meeting • Baseline layout – 97. 75 km single tunnel design, experiments located at point L, A, B and G, 4 larger magnet delivery shafts. • Double tunnel layout – 5 m ID and 3 m ID tunnels replace the single 6 m ID. • Baseline location including shaft depths – maximum 450 m deep. • Inclined access study including potential locations. • Shallow option • False floor study John Osborne, Joanna Stanyard (CERN-SMB-SE)

Updated schematic John Osborne, Joanna Stanyard (CERN-SMB-SE)

Layout position development • New layout design • 4 variations produced with small differences in the short arcs. John Osborne, Joanna Stanyard (CERN-SMB-SE)

Layout position development t f a r D ion t i s o P Inclined alternatives: 14. 9 % slope = 2560 m 6% slope = 4800 m John Osborne, Joanna Stanyard (CERN-SMB-SE)

Spoil Volume • Approximately 8 million m 3 of spoil from single tunnel option (unexpanded quantity). Typical proportions along tunnel length: Ø 91% molasse – sedimentary rock, potential use: general fill below road construction layers. Ø 6% limestone – potential use: concrete. Ø 3% moraines – fluvial deposits, minimal use. • Future study to provide the time and location of quantities of each type of spoil delivered to the surface. John Osborne, Joanna Stanyard (CERN-SMB-SE)

Baseline Schedule - DRAFT • Single tunnel, no inclined access tunnels. • Some potential for optimisation. • First sectors delivered in approximately 6 year, 10 months. • Construction complete in 7. 5 years. 1 2 3 4 5 6 7 John Osborne, Joanna Stanyard (CERN-SMB-SE)

Optimised Schedule - DRAFT • Single tunnel, with inclined access tunnels in sectors I -J, J-K & K-L. • First 2 adjacent sectors delivered in approximately 4 year, 8 months. • Construction complete in 6 years, 8 month. 1 2 3 4 5 6 John Osborne, Joanna Stanyard (CERN-SMB-SE)

FCC Tunnel 6 m diameter Survey Smoke/He Extraction Demineralized water DN 250 Cable trays (Fiber optics, LV distribution, control cable) HV transmission Cable trays (General services/secured network, MV distribution) SC link DN 250 Demineralized water filling DN 65 Radiating cable Compressed air DN 80 Raw water/firefighting Warm He recovery DN 250 He DN 100 First aid eqpt. QRL DN 1200 Electrical box Machine cryostat DN 1480 Transport vehicle Fresh air duct Drain fani. valchkova@cern. ch

FCC Tunnel and Alcove CV equipment: 18. 1 m² Transformer MV to LV switchgear: 31 m² Top view User racks: 28 m² 02/05/2017 fani. valchkova@cern. ch UPS and Secure systems: 31 m²

Ventilation Duct Dump DN 500 FCC Shaft 12. 5 m Ventilation Duct Machine Area DN 1200 (In) Open Space Transmission Line & Cable Trays Emergency Extraction Ducts DN 1200 Ventilation Duct UAs Underground Cavern (In/Out) DN 1000 Ventilation Duct Collimation (In/Out) QRL Vertical transfer line DN 1000 QRL Pipes: DN 100 - Helium ring line DN 250 - Warm recovery line DN 400 – Quench buffer line Pressurization Duct Shaft and Lift Cage 02/05/2017 Pipes: DN 200 - Primary water cooling DN 240 - Chilled water DN 150 - Fire fighting DN 200 - Make up water DN 80 - Compressed air DN 80 - Demineralized water DN 100 - Waste water DN 200 - Clear water drain fani. valchkova@cern. ch

FCC Shaft 12. 5 m 02/05/2017 fani. valchkova@cern. ch

PREVIOUS SLIDES 13

Baseline layout – 97. 75 km John Osborne, Joanna Stanyard (CERN-SMB-SE)

Baseline layout - Dimensions 18 m Ø shaft for magnet delivery. K Approximate Sector lengths: L A 18 m Ø shaft for magnet delivery. B J 18 m Ø shaft for magnet delivery. C I D 18 m Ø shaft for magnet delivery. H G John Osborne, Joanna Stanyard (CERN-SMB-SE) F E Section Total Length (m) A-B 5400 B-C 8800 C-D 10300 D-E 10300 E-F 8900 F-G 5300 G-H 5300 H-I 8900 I-J 10300 J-K 10300 K-L 8900 L-A 5300

Basic structure dimensions Structure Type Points Basic internal dimensions Standard Service Shafts D, F, H, J Diameter 12 m Magnet lowering service shafts C, E, I, K Diameter 18 m Experimental Shafts L, A, B, G Diameter 15 m Standard Service caverns D, F, H, J 15(w) x 15(h) x 100(l) Magnet lowering service caverns C, E, I, K 22(w) x 15(h) x 100(l) Service caverns at experimental points L, A, B, G 20(w) x 15(h) x 120(l) Experimental caverns L, A, B, G 30(w) x 35(h) x 70(l) Beam tunnel - Diameter 6 m John Osborne, Joanna Stanyard (CERN-SMB-SE) e. Pr A lps o M s ain t un

Double Tunnel L K A Structure Dimension Machine tunnel 5 m ID Safety tunnel 3 m ID B J C I D H G John Osborne, Joanna Stanyard (CERN-SMB-SE) F E Connection tunnel and alcove layout:

Geology of chosen layout for Phase 1 Cost & Schedule study • • • Length = 97. 75 km Minimises length of tunnel in the limestone, apart from the unavoidable location between H & I, only a small length of tunnel in Jura limestone. Avoids any tunnel length being in the moraines John Osborne, Joanna Stanyard (CERN-SMB-SE) John Osborne (CERN-SMB-SE)

Possible TBM launch locations Excavation proposal: • 2 sectors Drill & Blast (H-I and K-L) • 8 TBMs for the remaining 10 sectors • Mined excavation for remaining bypasses and auxiliary tunnels. John Osborne, Joanna Stanyard (CERN-SMB-SE) John Osborne (CERN-SMB-SE)

Inclined Access Study • Inclined access tunnels could replace service shafts or be used in addition to the shaft to accelerate the construction programme. • Could be located at the access points to replace shaft or in addition to shafts. • Possibility to locate between shafts to accelerate construction, particularly on long sections. • Feasibility has been confirmed for 6. 0 m ID ring and access tunnel. Machine ring John Osborne, Joanna Stanyard (CERN-SMB-SE) s ain t un Inclined tunnel o M e. Pr A lps

Inclined Access Tunnels at access points John Osborne, Joanna Stanyard (CERN-SMB-SE)

Inclined Access Tunnels between access points Examples with maximum 15% slope: 1 1: John Osborne, Joanna Stanyard (CERN-SMB-SE) 2: 3: 2 3

Lake Crossing: Tunnelling Considerations Immersed Tube Tunnel Superficial sediments Moraine Slurry TBM Molasse Open Shield TBM Medway Tunnel Immersed Tube Tunnel

Moraines Shallow Option • Shallow option passes through moraine under lake and at point E. • Total shaft depth reduced by 744 m compared to baseline. • Possibility for a further shallower option with a submerged tube tunnel under the late. John Osborne, Joanna Stanyard (CERN-SMB-SE)

False Floor Option John Osborne, Joanna Stanyard (CERN-SMB-SE)