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John Osborne GS/SE 16 May 2013

CENF Civil engineering update : - Site investigation - Call for tender for design & Contract Administration services. John Osborne GS/SE 16 May 2013. Site investigation for Near Detector and Target Area will be complete by end of May.

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John Osborne GS/SE 16 May 2013

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  1. CENF Civil engineering update :- Site investigation - Call for tender for design & Contract Administration services John Osborne GS/SE 16 May 2013

  2. Site investigation for Near Detector and Target Area will be complete by end of May

  3. Pumping tests have indicated that C12 (Near Detector) is in liaison with the ‘Lion’ Stream.

  4. Call for tender for CE Design and Contract Administration Tender documents : • Updated list of firms from MS • Instruction to Bidders • Technical Spec including : • Descriptive • Deliverables for the phases • Safety Rules • Drawings • Geology • Risk Matrix • Conditions of Contract • Tender Form • “Best Value for Money” Questions & Criteria (50%/50%) • etc

  5. Phases of Services Lump Sum • Phrase added top have a ’hold’ point after each phase to allow contract termination after any Phase

  6. Key Dates (1) • Specification Committee Monday 29 April. HSE & Legal Service consulted at the same time. Second meeting held Friday 3 May. • Technical documents complete • Documents will be send around for final comments this week • Target date for Bidders Conference is Mon 10 June • Target closing date for receiving bids is day 28 June • Special FC Approval in July (Accelerated Procedure required including Peers Review)

  7. Key Dates (2) (+1 month ?) Near and Far Buildings : • Tender Design (Phase 1) complete by October 2013 (over summer months !) • Construction Design (Phase 2) complete by end of 2013 • CE construction works early 2014 – early 2015 Target area Tender Design (Phase 1) complete by March 2014 • Construction Design (Phase 2) complete by July 2014 • CE construction works mid 2014 – early 2016 *Junction cavern, extraction tunnel and service bld dates to be confirmed *Input from all CERN services needed to allow this firm to do detailed civil design (CV,EL, Access, Cranes etc) November

  8. SPARES

  9. CATIA CE model of North Hall nearly complete for Integration Bld 887 L.Faisandel GS/SE

  10. CENF geological survey findings • Completed borings up till 30 April 2013: C11-C14 (near detector area) Stratigraphy C11 and C12 • 0.2m-1.2m topsoil and backfill • 1.2m to 8.0m Wurmian Moraine (clays, silts) • Consolidated • Intra-moraine units (marly, sandy, gravely), maximum thickness of 2.2m • Partially saturated → excavation in wet conditions • Between 6.0m and 13.0m gravels • Compacted • Aquifer → pumping tests will be carried out to determine the properties of the aquifer • From13.0m up to 20m Rissien Moraine Stratigraphy C13 • Entire borehole consists of Moraine, except for an intra-moraine marly and gravely unit at 5.0 – 7.2m depth • Marly unit partially saturated → excavation in wet conditions • Aquifer in gravels Stratigraphy C14 • Entire borehole consists of Moraine, except for an intra-moraine marly and gravely unit at 5.0 – 7.2m depth • Partially saturated → excavation in wet conditions • No well defined aquifer, but some water inflow has been noted Initial conclusions • Geology is very heterogeneous • Groundwater levels are variable

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