Jo Stanyard SMB Site Engineering FAS Section FCC Workshop FIMLCERN 3rd May 2017 Summary from 7 th March meeting John Osborne Joanna Stanyard CERNSMBSE Baseline layout 9775 km single tunnel design experiments located at point L A B and G 4 larger magnet delivery sha ID: 788492
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Slide1
FCC Civil Engineering
John Osborne & Jo Stanyard (SMB - Site Engineering - FAS Section)FCC Workshop FIML-CERN3rd May 2017
Slide2Summary from 7
th March meeting
John Osborne, Joanna Stanyard (CERN-SMB-SE)
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
Slide3Updated schematic
John Osborne, Joanna Stanyard (CERN-SMB-SE)
Slide4Layout position development
John Osborne, Joanna Stanyard (CERN-SMB-SE)
New layout design
4 variations produced with small differences in the short arcs.
Slide5Layout position development
John Osborne, Joanna Stanyard (CERN-SMB-SE)
Draft Position
Inclined alternatives:
14.9 % slope = 2560m
6% slope =
4800m
Slide6Spoil Volume
John Osborne, Joanna Stanyard (CERN-SMB-SE)
Approximately 8 million m
3
of spoil from single tunnel option (unexpanded quantity).
Typical proportions along tunnel length:
91%
molasse
– sedimentary rock, potential use: general fill below road construction layers.
6% limestone – potential use: concrete.
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.
Slide7Baseline Schedule -
DRAFT
John Osborne, Joanna Stanyard (CERN-SMB-SE)
1
2
3
4
5
6
7
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.
Slide8Optimised Schedule -
DRAFT
John Osborne, Joanna Stanyard (CERN-SMB-SE)
1
2
3
4
5
6
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.
Slide9FCC Tunnel 6m diameter fani.valchkova@cern.ch
Machine cryostat DN 1480QRL DN 1200
Warm He recovery DN 250
He DN 100
Compressed air DN 80
Demineralized water filling DN 65
SC link DN 250
Cable trays
(
Fiber
optics, LV distribution, control cable)
Survey
Smoke/He Extraction
Demineralized water DN250
HV transmission
Cable trays
(General services/secured network,
MV distribution)
Radiating cable
Raw water/firefighting
First aid eqpt.
Electrical box
Transport vehicle
Fresh air duct
Drain
Slide10fani.valchkova@cern.chFCC Tunnel and Alcove
Top view User racks: 28 m²UPS and Secure systems:
31 m²CV equipment: 18.1 m²
MV to LV switchgear: 31
m²
Transformer
02/05/2017
Slide11fani.valchkova@cern.ch
FCC Shaft 12.5mVentilation Duct Machine Area DN1200(In)Ventilation Duct UAsUnderground Cavern(In/Out)Pressurization Duct Shaft and Lift CageEmergency Extraction Ducts
DN1200QRL Pipes:DN 100 - Helium ring lineDN 250 - Warm recovery line
DN 400 – Quench buffer line
QRL Vertical transfer line
DN 1000
Transmission Line
&
Cable Trays
Pipes:
DN 200 - Primary water coolingDN 240 - Chilled waterDN
150 - Fire fightingDN200 - Make up waterDN80 - Compressed airDN80 - Demineralized waterDN100 - Waste water
DN200 - Clear
water
drain
Ventilation Duct Dump DN 500
DN 1000 Ventilation Duct
Collimation (In/Out)
Open Space
02/05/2017
Slide12fani.valchkova@cern.chFCC Shaft 12.5m
02/05/2017
Slide13PREVIOUS SLIDES13
Slide14Baseline layout – 97.75 km
John Osborne, Joanna Stanyard (CERN-SMB-SE)
Slide15Baseline layout - Dimensions
A
B
C
D
E
F
G
H
I
J
K
L
Approximate Sector lengths:
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
John Osborne, Joanna Stanyard (CERN-SMB-SE)
18
m Ø shaft for magnet delivery.
18
m Ø shaft for magnet delivery.
18
m Ø shaft for magnet delivery.
18
m Ø shaft for magnet delivery.
Slide16Basic structure dimensions
Pre-Alps Mountains
John Osborne, Joanna Stanyard (CERN-SMB-SE)
Structure Type
Points
Basic
internal dimensions
Standard
Service Shafts
D,F,H,J
Diameter 12 mMagnet lowering service shaftsC,E,I,KDiameter 18 mExperimental ShaftsL,A,B,GDiameter 15 mStandard 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
Slide17Double Tunnel
John Osborne, Joanna Stanyard (CERN-SMB-SE)
A
B
C
D
E
F
G
H
I
J
K
L
Structure
Dimension
Machine
tunnel
5 m ID
Safety tunnel
3 m ID
Connection tunnel and alcove layout:
Slide18Geology of chosen layout for Phase 1 Cost & Schedule study
Length = 97.75 kmMinimises 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 (CERN-SMB-SE)
John Osborne, Joanna Stanyard (CERN-SMB-SE)
Slide19Possible TBM launch locations
John Osborne (CERN-SMB-SE)
John Osborne, Joanna Stanyard (CERN-SMB-SE)
Excavation proposal:
2 sectors Drill & Blast (H-I and K-L)
8
TBMs for the remaining 10 sectors
Mined excavation for remaining by-passes and auxiliary tunnels.
Slide20Inclined Access Study
Pre-Alps Mountains
John Osborne, Joanna Stanyard (CERN-SMB-SE)
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
Inclined tunnel
Slide21Inclined Access Tunnels at access points
John Osborne, Joanna Stanyard (CERN-SMB-SE)
Slide22Inclined Access Tunnels between access points
John Osborne, Joanna Stanyard (CERN-SMB-SE)
Examples with maximum 15% slope:
1
2
3
1:
2
:
3:
Slide23Lake Crossing: Tunnelling Considerations
Open Shield TBM
Slurry TBM
Immersed Tube Tunnel
Superficial sediments
Moraine
Molasse
Medway Tunnel Immersed Tube Tunnel
Slide24Moraines Shallow Option
John Osborne, Joanna Stanyard (CERN-SMB-SE)
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.
Slide25False Floor Option
John Osborne, Joanna Stanyard (CERN-SMB-SE)
Slide26