Construction of the base tunnel of the Lyon-Turin railway link cross-border section from the french side - Operational worksites 5, 6/7 and 8

Description

Under the new Lyon-Turin railway link project, TELT society, as a contracting entity, is the public developer in charge of building and managing the cross-border section of the future infrastructure. The aim of this public procurement contract is to carry out construction works under operational worksites n. 5 (digging the base tunnel from the Villarodin-Bourget/Modane decline), n. 6/7 (digging the base tunnel from the La Praz and Saint-Martin-la-Porte declines) and n. 8 (digging the base tunnel from the Villard-Clément gates). Each lot of this public procurement contract is a mixed single-contractor framework contract, i.e. a framework contract with purchase orders and follow-on contracts. Lot 1: Operational Worksite 5 : Construction of the tunnel from the Villarodin-Bourget/Modane decline The activities of this lot n. 1 include the transfer of existing facilities (especially declines and Avrieux shaft) and the construction of all future base tunnel facilities over a distance of roughly 21.9 km for each tube, running from Modane up to the adjoining section in Italy. The works to be carried out by means of purchase orders may especially include : - construction of the Villarodin-Bourget platform (fence, earthworks, dikes, power supply, site ventilation, pit water treatment, other site facilities); - civil engineering works on the Modane safety site and the related service galleries (digging using conventional methods, supports, waterproofing and surfacing/paving) from the foot of the Villarodin-Bourget/Modane decline; - civil engineering works on the base tunnel (digging using conventional methods and/or tunnel boring machine, supports, waterproofing and surfacing/paving) as well as the related intertube galleries and service/utility rooms; - civil engineering works to reconstruct the Villarodin-Bourget/Modane decline in its final dimensions; - construction of all facilities needed to provide site logistics and backup (temporary or permanent facilities, underground works, utilities, etc...); - construction of sites for preclassification of excavated materials for subsequent reuse and of sites for the temporary or permanent storage of materials deriving from underground earthworks and excavations (Moulin and Tierces sites); - the stocking and transportation of excavated materials via conveyor belt. Works to be carried out through follow-on contracts (initiated or not depending on the operational date of the lot in charge of testing, sorting and reusing the excavation materials) involve the management and use of excavation materials, which may include all or some of the following services : - testing, sorting and final classification of excavation materials; - transfer of excavation materials to temporary or permanent disposal sites; - earthworks to allow for permanent storage on the Tierces site. Follow-on contracts may also allow for civil engineering works to be carried out to construct tunnel structures that will interface with future equipment contracts. The scope of this "Operational Worksite 5" lot may undergo limited changes in relation to the perimeters of "Operational Worksite 4" to the east and "Operational Worksite 6" to the west, based on the actual progress of each of the worksites and the need to keep the project implementation programme within the expected timeframes. The framework contract of this lot n. 1 shall be concluded without any minimum or maximum amount. The estimated amount mentioned in II.2.6. above is not contractually binding. This is merely a rough guide calculated on a base tunnel section length of approximately 21.9 km. Each purchase order or follow-on contract shall contain a contractual period of execution. Lot 2: Operational worksite 6/7 : Construction of the tunnel from the La Praz and Saint-Martin-la-Porte declines The activities of this lot n. 2 include the transfer of existing facilities (especially declines) and the construction of all future base tunnel facilities over a distance of roughly 23.1 km, running from Saint-Martin-la-Porte up to Modane. The works to be carried out by means of purchase orders may especially include : For operational worksite 6 (CO6) : - construction of the La Praz platform (fence, earthworks, dikes, power supply, site ventilation, pit water treatment, other site facilities); - civil engineering works on the La Praz safety site and the related service galleries (digging using conventional methods) from the foot of the La Praz decline; - civil engineering works on the base tunnel section of approximately 9 km long between the La Praz caverns and the Modane safety site (digging using conventional methods and/or tunnel boring machine) as well as the related intertube galleries and service/utility rooms; - additional civil engineering works on the tube running between the La Praz safety site and the Operational Worksite 7 (waterproofing and surfacing/paving). For operational worksite 7 (CO7) : - construction of the Saint-Martin-la-Porte platform (fence, earthworks, dikes, power supply, site ventilation, pit water treatment, other site facilities); - civil engineering works at the foot of the Saint-Martin-la-Porte decline for construction of the second tube, including the tunnel boring machine assembly cavern as well as the related intertube galleries and service/utility rooms; - civil engineering works on the second tube of the base tunnel of approximately 8 km long between the foot of the Saint-Martin-la-Porte decline and the foot of the La Praz decline (digging using conventional methods and/or tunnel boring machine) as well as the related intertube galleries and service/utility rooms; - additional civil engineering works on the existing tube running between Saint-Martin-la-Porte and La Praz (surfacing/paving, drainage, clean-up, laying of grouted-aggregate concrete); - additional civil engineering works on the existing tube running between the two branches of the Saint-Martin-la-Porte decline (reboring where needed, supports, waterproofing and surfacing/paving), partly going through productive coal strata; - civil works on the base tunnel (digging using conventional methods) towards Saint-Julien-Montdenis up to the junction with the adjacent work item. For operational worksites 6 and 7 (CO6/7) : - construction of all facilities needed to provide logistics and back-up (temporary and/or permanent facilities, underground works, utilities, etc.); - construction of sites for the pre-sorting of excavated materials for future reuse, as well as temporary and permanent disposal sites for materials deriving from earthworks and underground excavation. - the stocking and transportation of excavated materials via conveyor belt. Works to be carried out through follow-on contracts (initiated or not depending on the operational date of the lot in charge of testing, sorting and reusing the excavation materials) involve the management and use of excavation materials, which may include all or some of the following services : - testing, sorting and final classification of excavation materials; - transfer of excavation materials to temporary or permanent disposal sites. Follow-on contracts may also allow for civil engineering works to be carried out to construct tunnel structures that will interface with future equipment contracts. The scope of this "CO 6/7" lot may undergo limited changes in relation to the perimeters of "Operational Worksite 5" to the east and "Operational Worksite 8" to the west, based on the actual progress of each of the projects and the need to keep the project implementation programme within the expected timeframes The framework contract on this lot n. 2 shall be concluded without any minimum or maximum amount. The estimated amount mentioned in II.2.6. is not contractually binding. It is merely a rough guide calculated on a base tunnel section length of approximately 23.1 km. Each purchase order or follow-on contract shall contain a contractual period of execution. Lot 3: Operational worksite 8 : Construction of the tunnel from the Villard-Clément gates The activities of this lot n. 3 include the transfer of existing facilities (especially the cut-and-cover tunnel of Saint-Julien-Montdenis and related facilities) and construction of all future base tunnel facilities over a distance of roughly 1.8 to 4 km in the immediate vicinity of Villard-Clément. The works to be carried out by means of purchase orders may especially include : - construction of the Villard-Clément worksite platform (fence, earthworks, dikes, power supply, site ventilation, pit water treatment, other site facilities); - temporary supports needed for earthworks to construct the attack point of the base tunnel; - earthworks needed to construct the attack point of the base tunnel and the cut-and-cover tunnel linked with the one already completed. - civil engineering works on the two tubes of the base tunnel over a distance of 1.8 to 4 km (digging, supports, waterproofing and surfacing/paving), as well as the related intertube galleries and service/utility rooms; - civil engineering works on the cut-and-cover tunnel linked with the one already constructed under Operational Worksite 9a and the base tunnel entrance, over roughly 150 m, plus the permanent backfilling on the facility itself; - construction of all facilities needed to provide logistics and back-up (temporary and/or permanent facilities, underground works, utilities, etc...); - construction of sites for the pre-sorting of excavated materials for future reuse and temporary disposal; - the stocking and transportation of excavated materials via conveyor belt. Works to be carried out through follow-on contracts (initiated or not depending on the operational date of the lot in charge of testing, sorting and reusing the excavation materials) involve the management and use of excavation materials, which may include all or some of the following services : - testing, sorting and final classification of excavation materials; - transfer of excavation materials to temporary or permanent disposal sites. Follow-on contracts may also allow for civil engineering works to be carried out to construct tunnel structures that will interface with future equipment contracts. The scope of this "Operational Worksite 8" lot may undergo limited changes within the perimeters of "Operational Worksite 7" to the east, based on the actual progress of each of the worksites and the need to keep the project implementation programme within the expected timeframes. The framework contract on this lot n. 3 shall be concluded without any minimum or maximum amount. The estimated amount mentioned in II.2.6. is not contractually binding. It is merely a rough guide calculated on a base tunnel section length of approximately 4 km. Each purchase order or follow-on contract shall contain a contractual period of execution