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

CENF – Civil Engineering Extension B887 CE Design Phases & Work Supervision: Tender Design phase  completed in July-2014 Construction Design phase  started in Sept months Construction Supervision phase  foreseen in Jan months EHN1 Extension #1 Coordination Meeting N.Lopez, M.Manfredi (GS-SE) 13 November 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: ) and CE Calculation Notes (Ref. EDMS: ) 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..

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 Prévessin. 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

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 Extension PIT A: 7.35m deep PIT B: 9.0m deep EHN1 Extension #1 Coordination Meeting N.Lopez, M.Manfredi (GS-SE) 13 November External concrete slabs for Cryo and electrical equipment.

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 Section B-B Plan view

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

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

façade 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

CENF – Civil Engineering Extension B887 Schedule: Start date (T0): CERN Work order + 15 days Completion date: T months Key dates: T months: WP1: Civil engineering structure completed WP2: Access for WP2 contractor to work area T 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

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

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 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

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: EP see also: EP , for the General Plan View (Existing EHN1 earthing layout) EHN1 Extension #1 Coordination Meeting N.Lopez, M.Manfredi (GS-SE) 13 November EL -EL: Worksite Power Supply Earthing Design and Installation for the EHN1 extension and coordination during construction works

-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

EHN1 Extension #1 Coordination Meeting N.Lopez, M.Manfredi (GS-SE) 13 November CENF – Civil Engineering Extension B887 Thanks for your attention.. Questions?