CENF CIVIL ENGINEERING UPDATE : - SITE INVESTIGATION - CALL FOR TENDER FOR DESIGN & CONTRACT ADMINISTRATION SERVICES - 3D VISUALS FOR SURFACE STRUCTURES John Osborne GS/SE 6 June 2013

Site investigation for Near Detector and Target Area will be complete (pumping tests on-going)

Pumping tests on cores C8,C10 & C12 Report expected by early July

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 Call for tender for CE Design and Contract Administration documents ready for issue

3D Visualisations for Near, Far and Taget Areas These artist impressions are essential for Impact Study and Building Permit submissions Offer from a company for : Site visit and take base photographs Prepare 3D wire-frame models from 2D Autocad drawings Existing ground survey files to be prepared by CERN Deliver images for Near, Far and Target Area by mid July Same company prepared all 3D images for CERN MasterPlan2030 Estimate = 9200CHF

3D Visualisations – Example from MasterPlan : Bld 54 and Bld 30 extensions

SPARES

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

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)

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) Key Dates (2) (+1 month ?) November

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

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