CENF Civil Engineering Extension B887 CERN: An accelerator
complex unique in the world -Prevessin site complex- -EHN1
Extension Area- EHN1 Extension #1 Coordination Meeting N.Lopez,
M.Manfredi (GS-SE) 13 November 2014 1
Slide 2
CENF Civil Engineering Extension B887 CE Design Phases &
Work Supervision: Tender Design phase completed in July-2014
Construction Design phase started in Sept-2014 + 3 months
Construction Supervision phase foreseen in Jan-2015 + 18 months
EHN1 Extension #1 Coordination Meeting N.Lopez, M.Manfredi (GS-SE)
13 November 2014 2 GS-SE Main activities ongoing : Preparation
Works study started in Oct-2014 (trees removal, networks deviation
study, etc..) involves other CERN group.. Execution Drawings (Ref.
EDMS: 1424414) and CE Calculation Notes (Ref. EDMS: 1423448)
received A first EDMS Approval procedure launched. As agreed Ilias
has been notified as person in charge for the integration
coordination.. Analysis of the Technical Documents submitted by the
awarded firms (GC&CM works) after the Tender phase GS-SE
internal evaluation..
Slide 3
Extension Site Installation Area Tunnel TDC85 Experimental Hall
B.887 (EHN1) Technical Aspect: Location CENF Civil Engineering
Extension B887 The EHN1 is a large industrial building situated on
french territory, in Prvessin. The building has to be extended for
the new generation of experiments on the neutrinos. The Extension
will extend northwards from the building for about 70 m in the
direction of the beams. EHN1 Extension #1 Coordination Meeting
N.Lopez, M.Manfredi (GS-SE) 13 November 2014 3
Slide 4
CENF Civil Engineering Extension B887 Technical Aspect: General
info The Extension's dimensions are 72 m long by 50 m wide and 20 m
high. The Extension includes two large pits of 7.35m and 9.0m deep.
The top metallic structure is similar to the existing building,
allowing for an easy continuation of the overhead crane and
services. The technical gallery will be prolonged. Swallow service
trenches will provide the access from the sidewalls to the pits.
72.0 50.0 Extension PIT A: 7.35m deep PIT B: 9.0m deep 19.041.0
20.0 16.5 EHN1 Extension #1 Coordination Meeting N.Lopez,
M.Manfredi (GS-SE) 13 November 2014 4 External concrete slabs for
Cryo and electrical equipment.
Slide 5
Section A-A A A B B The works to be carried out will include:
Construction sheet piles Construction diaphragm wall and final tie
beams Construction of reinforced concrete structure (raft
foundations, slabs, walls, etc.) Demolition of the existing gable
retaining wall Technical Aspect: Civil Engineering main activities
(1/2) CENF Civil Engineering Extension B887 EHN1 Extension #1
Coordination Meeting N.Lopez, M.Manfredi (GS-SE) 13 November 2014 5
Section B-B Plan view
Slide 6
General worksite installation Rerouting and cutting existing
underground networks Mass and ditch earthworks Drawdown of the
water table Road works, car parks and landscaping. Rainwater
treatment structures (worksite and definitive) Notes: Particular
attention should be kept to the extracted cut material within 5.50m
of distance from the TDC85 Radiological Protection: People allow to
enter the technical gallery or inside the existing building 887
should equipped (passive/operational dosimeter) and accredited by
CERN. No special measure need to be planned to work outside
Technical Aspect: Civil Engineering main activities (2/2) CENF
Civil Engineering Extension B887 EHN1 Extension #1 Coordination
Meeting N.Lopez, M.Manfredi (GS-SE) 13 November 2014 6
Slide 7
Structural steelwork and associated components (Main and
Secondary structures, Internal structures, Travelling crane
structures) Metalwork: guardrails, stairs, ladders, doors Removal
of the north gable of the existing building (not before the
extension is water- tight and air-tight) CENF Civil Engineering
Extension B887 Technical Aspect: Structural steel main activities
(1/2) EHN1 Extension #1 Coordination Meeting N.Lopez, M.Manfredi
(GS-SE) 13 November 2014 7
Slide 8
faade roofing doors glazed windows ladders with safety cages
safety barriers rainwater pipes cryogenics roof etc. CENF Civil
Engineering Extension B887 Technical Aspect: Structural steel main
activities (2/2) EHN1 Extension #1 Coordination Meeting N.Lopez,
M.Manfredi (GS-SE) 13 November 2014 8
Slide 9
CENF Civil Engineering Extension B887 Schedule: Start date
(T0): CERN Work order + 15 days Completion date: T0 + 18 months Key
dates: T0 + 11 months: WP1: Civil engineering structure completed
WP2: Access for WP2 contractor to work area T0 + 16 months: WP2:
Structural Steel work completed WP1: Access for WP1 contractor to
work area T0 + 7 months: WP2: Supply of all metal inserts in the
concrete T0 + 4 months: WP2: Provision of WP2 detailed design EHN1
Extension #1 Coordination Meeting N.Lopez, M.Manfredi (GS-SE) 13
November 2014 9
Slide 10
EL -EL: Worksite Power Supply Earthing Design and Installation
for the EHN1 extension and coordination during construction works
CV -CV: Firefighting network work (North Area) Potable Water for
the worksite (from EHN1) Drainage water network from ECN3-TCC8 to
be repaired GS-SE -GS-SE: Trees felling + B.918 storage RP -RP:
Monitoring System removal TSO TT85 -TSO TT85: Access condition for
the TT85 visit 72m 50m Extension Area IT -IT: Internet connection
-Before the start of the works (now Dic-2014) CENF Civil
Engineering Extension B887 EHN1 Extension #1 Coordination Meeting
N.Lopez, M.Manfredi (GS-SE) 13 November 2014 10
Slide 11
CENF Civil Engineering Extension B887 -At the beginning of the
works (Jan-2015), RP -RP: Monitoring System removal IT -IT:
Internet connection GS-SE -GS-SE: Trees felling + B.918 storage TSO
TT85 -TSO TT85: Access condition for the TT85 visit EHN1 Extension
#1 Coordination Meeting N.Lopez, M.Manfredi (GS-SE) 13 November
2014 11 CV -CV: Firefighting network work (North Area) Potable
Water for the worksite (from EHN1) Drainage water network from
ECN3-TCC8 to be repaired (Worksite Area layout) EL -EL: Worksite
Power Supply Earthing Design and Installation for the EHN1
extension and coordination during construction works
Slide 12
CENF Civil Engineering Extension B887 -During the works
(beginning-2015), CV -CV: Firefighting network work (North Area)
Potable Water for the worksite (hydrant?) Temporary drainage water
(ECN3-TCC8) deviation RP -RP: Monitoring System removal TSO TT85
-TSO TT85: Access condition for the TT85 visit IT -IT: Internet
connection GS-SE -GS-SE: Trees felling + B.918 storage Drawing
reference: EP308870038..see also: EP308870001, for the General Plan
View (Existing EHN1 earthing layout) EHN1 Extension #1 Coordination
Meeting N.Lopez, M.Manfredi (GS-SE) 13 November 2014 12 EL -EL:
Worksite Power Supply Earthing Design and Installation for the EHN1
extension and coordination during construction works
Slide 13
-During the works (end-2015), CENF Civil Engineering Extension
B887 (Existing services & platforms removal on the North gable
all groups involves) EHN1 Extension #1 Coordination Meeting
N.Lopez, M.Manfredi (GS-SE) 13 November 2014 13
Slide 14
EHN1 Extension #1 Coordination Meeting N.Lopez, M.Manfredi
(GS-SE) 13 November 2014 14 CENF Civil Engineering Extension B887
Thanks for your attention.. Questions?