France - Railway tunnel construction work

Description

The works in this Lot 1 include the transfer of existing structures (in particular the Maddalena 1 gallery and its installations, as well as all areas and installations at the Chiomonte site) and the construction of all future structures for the base tunnel, each tube being approximately 9,5 km long, from the boundaries of operational worksite 5 (CO5: boring of the base tunnel from the Villarodin-Bourget/Modane drift) up to the East entrance of the base tunnel in Susa.The works that may be carried out by means of purchase orders are as follows:— preparatory site works in the Colombera zone to extend the present La Maddalena area on the left bank of the Clarea river (fences, security installations, earthwork, backfilling, interface development, electric power supply, site ventilation, ancillary installations, living quarters, areas for temporary storage of excavation materials, etc.),— construction surveys for tunnel structures,— construction surveys and performance of all environmental surveillance and materials checking services,— work systems and security costs according to the legislative decree 81/08,— construction of the structures at the entrance to the Maddalena 2 decline,— boring of the Maddalena 2 decline by TBM,— construction by conventional method of the cavern used to assemble the TBM to excavate the odd line of the base tunnel,— excavation by conventional method of the Maddalena 1 — Clarea security area interconnection tunnel, and of the Maddalena 2 — Clarea security area interconnection tunnel,— excavation by TBM of the 2 base tunnel tubes (even and odd lines),— construction of the Clarea security area and of the caverns to assembly the TBMs for the CO5 operational worksite,— transport of excavated materials to the Salbertrand reclamation site,— construction of the facility to prefabricate tunnel segments in the Salbertrand area, prefabrication and transportation of segments to line the 2 tubes of the base tunnel,— construction of the Maddalena 1 bis tunnel to store the greenstone,— final securing of the excavated greenstone for the construction of the base tunnel, in the Maddalena 1 and Maddalena 1 bis tunnels,— construction of the structures at the East entrance of the base tunnel in Susa,— winding down of the work site and renovation of the sites in the La Maddalena and Salbertrand areas.The works that may be performed by means of follow-on contracts (launched or not depending on the CO5 completion date) consist of so-called ‘counter-attack’ services for the excavation of the base tunnel on the La Clarea site towards France, which may include all or part of the following services:— construction surveys for the counter-attack operation, including moving the caverns to dismantle the TBMs used for the CO5 operational worksite,— excavation of the base tunnel as part of the counter-attack.Follow-on contracts may as well allow for civil works to be carried out to construct tunnel structures that will interface with future equipment contracts.The scope of this ‘Operational worksite 3/4’ lot may undergo minor changes at the limits of ‘Operational worksite 5’ to the West, based on the actual progress of each worksite and the need to comply with the projected project implementation programme schedule.The duration mentioned in II.2.7) is the period of time during which the purchase orders and follow-on contracts may be issued. The tentative duration for the execution of works (outside the preparation and warranty periods) is of 81 months for Lot 1. A contractually binding performance deadline will be set for each purchase order or follow-on contract. The works in this Lot 2 include the transfer of existing structures, construction of the railway platforms to load and unload excavation materials for transportation by rail, and the construction of reclamation installations for the materials excavated from operational worksites 1, 3 and 4, to produce:— CE aggregates for concrete to be reused in operational worksite 1 (CO1: Bussoleno tunnel), operational worksite 2 (CO2: Susa plain) and operational worksite 3/4 (CO3/04: base tunnel),— backfill materials to be mainly reused for CO2,— environmental requalification materials (Caprie and Torrazza sites).The works that may be carried out by means of purchase orders are as follows:— construction surveys for all platforms, installations and structures concerning this operational worksite 10,— construction surveys and performance of all environmental monitoring and materials checking services,— work systems and security costs according to legislative decree 81/08,— construction of the railway platforms at Salbertrand, Caprie and Torrazza,— construction of reclamation installations,— full management of excavation materials according to Italian legislation,— railway transportation of the reclaimed materials from Salbertrand to the Caprie and Torrazza depots,— storage of reclaimed materials.The works that may be performed by means of possible follow-on contracts (launched or not depending on the date pollution clean-up operations are carried out by third parties) consist of designing and executing pollution clean-up work on any contaminated zones required for the project.The scope of this ‘Operational worksite 10’ lot may undergo minor changes at the limits of ‘Operational worksite 4’ to the West, based on the actual progress of each of the worksites and the need to comply with the projected project implementation programme schedule.It is to be noted that transportation of materials by rail must be managed by authorised companies in Italy in line with the ASNF directive.The duration mentioned in II.2.7) is the period of time during which the purchase orders and follow-on contracts may be issued. The tentative duration for the execution of works (outside the preparation and warranty periods) is of 81 months for lot 2. A contractually binding performance deadline will be set for each purchase order or follow-on contract.

Opportunity closing date

16 September 2019

Value of contract

to be confirmed