Download presentation
Presentation is loading. Please wait.
Published byJasmine Joy Thornton Modified over 6 years ago
1
East Hall renovation East Hall Renovation : Civil Engineering works
Stewart Mcilwraith – Charly Gasnier (SMB-SE) B /12/2017 SMB-SE
2
Initial baseline : Scope & budget Status following PB #1
Contents Initial baseline : Scope & budget Status following PB #1 Subsidised options: Scope & Costs Budget Skylight Planning Procurement Status Safety Façade composition Conclusions B /12/2017 SMB-SE
3
1. Initial Baseline : Scope & Budget
2 Work zone 1: 260m2 of glazing 4600m2 of suspended ceiling Roof waterproofing verification Work zone 2: 1250m2 of glazing 1200m2 of Eternit façade cladding B /12/2017 SMB-SE
4
1. Initial Baseline : Scope & Budget
Glazing to replace 260m2 Ceiling panels to replace 4600m2 Roof fixations & gutter integrity checks Suspended scaffolding (~5000 m2) B /12/2017 SMB-SE
5
1. Initial Baseline : Scope & Budget
Fibre-cement cladding to be replaced (1200 m2) Glazing to replace(1250 m2) Note: Possibility to reduce mid-level glazing to be investigated B /12/2017 SMB-SE
6
1. Initial Baseline : Scope & Budget
Total CE budget following SMB IPP study (presented in PB#1 and C&S review 08/12/16): 2.48 MCHF (+/- 30%) Available budget (update 06/04/17): 2.24 MCHF (-5% to centralised contingency & -5% due to CVI) No reduction in scope associated with budget reduction B /12/2017 SMB-SE
7
2.1 Status following PB#1 – Discussion topics
Conflict with CLOUD run (Winter 2017): Suspended scaffolding installation order inversed on North-east façade to avoid conflict. Removal of services from facades prior to CE works: Ventilation units on NE façade to be removed in 12/2017 All other items removed during 2017 campaign Safety Coordinator: EN-ACE (M. Bonnet ,EROS team) collaborating since 06/17 and will be responsible for on-site safety coordination throughout the works. O. Prouteau contributing asbestos expertise. Synergy with B156 envelope: SMB preliminary studies (SMB-SE-CEB) on-going Procurement for external architects underway Visual consistency with B157 renovation prioritised B /12/2017 SMB-SE
8
2.2 Status following PB#1 - Roof
Baseline prior to PB#1: Replace ceiling / repair roof Three issues with existing roof / ceiling: 1) Asbestos – health risk – In Baseline 2) High energy loss (uninsulated) – (CHF!!!) – In Baseline 3) Leaks Baseline : punctual interventions (Gutter replacement & fixation / joint checks) Following CE design: not technically / financially advisable to continue to punctually repair roof leaks given age of roof. Leaks reappear and damage new false ceiling. Solution proposed : Replace roof with insulated sandwich panels instead of replacing false ceiling / repairing roof. Proposal confirmed with project team 07/17 B /12/2017 SMB-SE
9
2.2 Status following PB#1 - Roof
1) Remove / replace ceiling + repair roof 2) Remove ceiling / roof + replace roof B /12/2017 SMB-SE
10
3. Subsidised options: Scope & Costs
The East Hall renovation project is eligible for a subsidy from the Office Cantonal de l’ENergie (OCEN) if Uenvelope<0.20 W/(m2.K). - Concrete walls, durasol panels, polycarbonate panels and windows are outside of this criteria. - Sandwich panels are within the criteria Facade materials Gable insulation Lower façade wall insulation B /12/2017 SMB-SE
11
3.1 Façade Materials B.157 - 05/12/2017 SMB-SE
Technical description of the solution: Replacement of central polycarbonate panels with sandwich panels (542m2) Reduction of light in building Financial impact: Not included in IT. Unit prices for material exist in IT. Modification of quantities. Estimation based on contractor’s unit prices: -49k CHF Possible subsidy from OCEN: -38k CHF Estimated return in terms of energy consumption: -6k CHF / y (costs 2016/17) Status: Approved by project team B /12/2017 SMB-SE
12
3.2 Gables Technical description of the solution: Insulation of exposed gable walls Included in IT (with possibility to retract) 660m2 of concrete / durisol walls insulated externally by sandwich panels Financial impact: Contractor price: +80k CHF Possible subsidy from OCEN: -46k CHF Return in terms of energy consumption: -8k CHF / y (costs 2016/17) Status: Retractable option in contractor mandate Sandwich Panels Sandwich Panels B /12/2017 SMB-SE
13
3.3 Lower Façade Walls +950 m2 (total 2 facades) B.157 - 05/12/2017
Technical description of the solution: Insulation of lower longitudinal walls, 950m2 of concrete / durisol walls insulated externally by sandwich panels. Conflict possible with external services (e.g. gas point) Financial impact: Not included in IT. Unit prices for material exist in IT. Modification of quantities. Estimation based on contractor’s unit prices: +92k CHF Possible subsidy from OCEN – 66.5k CHF Estimated return in terms of energy consumption: -12k CHF / y (costs 2016/17) Status: Proposition Sandwich panels Sandwich panels +950 m2 (total 2 facades) B /12/2017 SMB-SE
14
3.4 Subsidies OCEN B.157 - 05/12/2017 SMB-SE
Dossier currently under approval with OCEN (Decision expected 2017) Subsidy received once works are completed (2019) Possible to await confirmation of subsidies prior to engaging extra work from Contractor Item Cost variation contractor Possible subsidy OCEN Estimated annual energy savings (2016 prices) Baseline Roof -392 -250 Main facades (baseline) -82 Total baseline -474 Options Change of façade materials -49 (estimate) -38 -6 Gables 80 -46 -8 Lower walls 92 (estimate) -66 -12 Total Options 123 -150 -26 B /12/2017 SMB-SE
15
4. Budget (k CHF) Baseline Options B.157 - 05/12/2017 SMB-SE Article
IPP Price OCEN subsidies Net total Baseline Architect Yes 110 Installations 931 Façade replacement 984 -82 902 Asbestos removal façades 140 Asbestos removal ceiling No 420 Replacement ceiling + minor works Replacement roof + minor works 831 -392 439 Total baseline 2 480 3 336 -474 2 862 Options Façade materials* (approved) -49 -38 -87 Gables (in contractor mandate) 80 -46 34 Lower walls* (proposition) 92 -66 26 Total with options 2480 3459 -624 2835 Energy savings -15/y* -235/y* -250/y -6/y* -8/y* -12/y* -276/y * Estimated based on contractor’s unit prices / CERN energy calculations (rates 2016/2017) B /12/2017 SMB-SE
16
5. Skylight removal B /12/2017 SMB-SE
17
5. Skylight B.157 - 05/12/2017 SMB-SE Advantage Disadvantage
Reduction of heated volume (3.5% of volume at high point of building) Loss of architectural identity Reduction of thermal bridges (windows & horizontal / vertical joints between panels / windows) Reduction of overall surface of natural light Optimisation of effectiveness of natural light (horizontal skydomes replacing vertical windows) Reduction of envelope material liaisons / risks associated with water ingress Reduction of maintenence needs Improvement of smoke ventilation efficiency Variant Cost Subsidies Net total Energy savings* Baseline 3 336 -474 2 862 -250/y Options 123* -150 -27 -26/y Skylight -75* -75 - (unknown) Total 3 384 -624 2 760 > -276/y B /12/2017 SMB-SE
18
6. Planning Extremely tight planning from December 2016 until now respected with one exception – procurement of suspended scaffolding contractor Result: delay of installation of suspended scaffolding Re-phasing of main contract tasks so suspended scaffolding is not on critical path Modification to take into account for co-activity with exploitation B /12/2017 SMB-SE
19
6.1 Planning - Impact on EA activities
Suspended scaffolding test as of January 15th Test area Shielded Area Area to be condemned Shielded Area Overhead crane to be used as protection B /12/2017 SMB-SE
20
6.1 Planning - Impact on EA activities
T09, T10, CHARM and IRRAD: Mar-18 to Nov-18 T09: very sensitive users (BL4S) in Sep-18 CLOUD users: Sep-18 to Dec-18 Magnet patrol: 05/02/18 Already installed Prioritised before end 03/18 Remaining zones CLOUD users 09 to 12/18 T09-T10 users T09-T10 users 03 to 11/18 Shielded Area Shielded Area CHARM-IRRAD users 03 to 11/18 * If works are delayed, local protections can be installed above CHARM-IRRAD B /12/2017 SMB-SE
21
6.2 Planning - Impact on surrounds
North-East side of the building : Jan-18 to July-18 Sout-West side of the building : July-18 to February-19 Site installations 21 parking places inaccessible during 7 months Envelope renovation works on NE side (façade then roof) Envelope renovation works on SO side (roof then façade) 14 parking places inaccessible during 7 months Site installations B /12/2017 SMB-SE
22
7. Procurement Status Asbestos removal and shell renovation
Technical and commercial analysis completed Letter of intent sent. Execution studies and initial orders underway. Finance Committee 13/12 VIC’s and minor activities on site by January 8th Contractor full mobilisation on site by January 15th Suspended scaffolding Final technical documentation from lowest bidder (December 8th). HSE approval required by December 22nd. Test installation to start by January 15th B /12/2017 SMB-SE
23
7. Procurement Status - Risks
There exists a risk that the documentation submitted by the lowest bidder will be unacceptable. No other response to DO was within the budget attributed to this task The order of contingency for this situation is proposed as follows: 1) Principal contractor to subcontract scaffolder and include in principal work package If not technically acceptable / within budget 2) Principal contractor proposes methodology to remove false ceiling / roof from above with alternative safety / waterproofing measures (external bridge, safety nets, harnesses and safety lines…) 3) Roof / ceiling replacement removed from initial CE work to be carried out during 2018 B /12/2017 SMB-SE
24
8. Safety All activities will be subject to a VIC before works can start. Suspended scaffolding Zone of influence of installation & removal will be enclosed by 2m-high barriers. Façade renovation Welded Polyane will be installed to protect interior of the building from severe weather Roof renovation Welded Polyane will be installed on suspended scaffolding to protect interior of the building from severe weather B /12/2017 SMB-SE
25
8. Safety - Asbestos Users will never be in contact with asbestos containing materials during CE works and do not require protective equipment Zone underneath false ceiling will be confined as an airtight space. Workers inside this space will wear protective equipment Asbestos containing materials will be placed into a decontamination SAS and into protective bags Closed protective bags will leave the SAS and be transported directly to the exterior of the building via personnel doors / open windows Bags will be stored in dedicated area within closed worksite Bags will be checked by RP prior to transport to appropriate waste treatment facility B /12/2017 SMB-SE
26
9. Façade composition Approved by CERN visual identity / colour chart (F. Landua) White sandwich panels : RAL 9010 (TBC) Grey sandwich panels : RAL 9006 (standard CERN) B /12/2017 SMB-SE
27
10. Conclusions Outcomes from PB#1 have been integrated into project
Possibilities to increase scope in CERN’s interest (appearance, energy consumption, lifespan) with negligible extra cost or even reductions in cost Possibility to await outcome of OCEN analysis to ensure informed decisions about such scope increases CE project is over initial budget, but alternatives are available to reduce this overspend CE project critical path is on track Collaboration with exploitants is close and major milestones are planned around exploitation. Day-to-day co-activity to be managed on-site Principal contractor is engaged and ready to begin in January Suspended scaffolding contractor is not yet engaged and presents a project risk All possible measures to ensure safe coactivity and project execution are being taken It is possible to give this important experimental building an architectural identity within the CERN colour chart (almost) and the neighbouring architectural context… at no extra cost B /12/2017 SMB-SE
28
Questions B /12/2017 SMB-SE
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.