19 February 20151

Summary:

• Updating on the activities completed (Done) since the last meeting• List activities on going (Next steps) and related Actions

CENF – Civil Engineering Extension B887

Extension of Building 887 - 14th EHN1 Extension Integration Meeting N.Lopez – M.Manfredi

19 February 20152

(5th week) Concrete blocks removal, cores for water and electrical connections inside EHN1 completion

(4th week) “Visite d’Inspection Commune” (VIC), for the earthworks and worksite installation, Permit to dig issued by CERN to the contractor. Earthworks contractor on site

Done (1/4): Site work side

CENF – Civil Engineering Extension B887

Extension of Building 887 - 14th EHN1 Extension Integration Meeting N.Lopez – M.Manfredi

19 February 20153

(5th week) Ground surveys to determine its profile (top soil thick, water table depth..). Septic tank survey and site entrance area arrangement

(5th week) Existing networks research. Valve installation by SIG on the potable water network.

Done (2/4): Site work side

CENF – Civil Engineering Extension B887

Extension of Building 887 - 14th EHN1 Extension Integration Meeting N.Lopez – M.Manfredi

19 February 20154

(6th week) All week snow. Site Activities stopped due to the weather conditions

Done (3/4): Site work side

(7th week) Snow removal, start top soil excavation (about 50cm), platform for site barracks creation.

CENF – Civil Engineering Extension B887

Extension of Building 887 - 14th EHN1 Extension Integration Meeting N.Lopez – M.Manfredi

19 February 20155

(7th week) Existing drainage network research, concrete manhole installation, trench for service connection and top soil excavation completion (Transport toward storage area completed this week)

Done (4/4): Site work side

CENF – Civil Engineering Extension B887

Extension of Building 887 - 14th EHN1 Extension Integration Meeting N.Lopez – M.Manfredi

19 February 20156

Done (1/1): Design and study side

Final comments on the execution docs (issued 05/02) sent by CERN to the consultant. Awaiting for the updated version before the EDMS uploading.

RP issue, additional soil thickness needed above the tunnels. Structural evaluation due to the overload and reference plan with new requirements provided to the Contractor (issued 12/02)

“Etat des lieux” on the existing facilities (i.e. EHN1, underground tunnels TT84-TT85-TDC85, Roads and Storage Area). (completed 16/02)

..

Weekly site meeting + Coordination and Neutrino General meeting

CENF – Civil Engineering Extension B887

Extension of Building 887 - 14th EHN1 Extension Integration Meeting N.Lopez – M.Manfredi

Extension of Building 887 - 14th EHN1 Extension Integration Meeting N.Lopez – M.Manfredi

Next Steps

Analyse Plan and Execution Method about the existing facilities instrumentation (i.e. topographic and cracks monitoring, vibration measure and inclinometers) and TG portion in front the TDC85 enlargement (on going and awaiting submission)

Analyse Plan and Calculation Notes received for the Diaphragm Walls and Sheet Piles execution (on going)

(foreseen 8th 11th week)

• Topsoil excavation removal

• General Site installation and access road completion

• Mass earthworks until the DW level upper part

• Site installation for the Special works contractor (DW +SP)

• Guide walls construction for DW excavation purpose

• Start DW excavation (drilling west side)

CENF – Civil Engineering Extension B887

19 February 20157

Overloads on the horizontal elements (1/2):

CENF – Civil Engineering Extension B887

Extension

• Pits, levels -7.35m; -9.00m

300 KN/m2

• Technical gallery, level -3.45m

PIT A

PIT B

GHN106

-7.35m-3.45m

19 February 20158

10 KN/m2

UPDA

TED!!

Extension of Building 887 - 14th EHN1 Extension Integration Meeting N.Lopez – M.Manfredi

CENF – Civil Engineering Extension B887

19 February 20159

Extension of Building 887 - 14th EHN1 Extension Integration Meeting N.Lopez – M.Manfredi

Pannels for Diaphragm walls execution:

Numerations in plan: Panel Type:

N°47 must be modified for technical needs:(execution method, watertightness)

48

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