Tenders Are Invited For Construction Work For Bridges And Tunnels, Shafts And Subways – Site 5: Works Contract For Extension Works Of The Network Of Galleries Of The Underground Research Laboratory And Associated Works.

Construction Work For Bridges And Tunnels, Shafts And Subways – Site 5: Works Contract For Extension Works Of The Network Of Galleries Of The Underground Research Laboratory And Associated Works.. Andra Plans To Carry Out A New Extension Of The Network Of Underground Galleries As Well As Carrying Out Development Work In Existing Galleries Known As “Site 5”, The Subject Of This Consultation. This Project 5 Consists Of: - The Continued Development Of The Network Of Galleries At – 490 M Over Approximately 530 M With: O The Digging And Supporting Of 3 Galleries In Curved Section S4 (Ø 5.70 M) O The Digging And Supporting Of An X-Shaped Crossroads In Section With Compressible Wedges S9 (Ø 6.70 M); O Excavation In Full Section And Support Of The Extension Of The Ggs Gallery (Ø 10.50 M); O Excavation In Full Section And Support Of An X-Shaped Intersection In Section With S12 Compressible Wedges (Ø 10.50 M); O Carrying Out Civil Engineering Works To Cover (Approximately 50 Cm Thickness) The Ggs Gallery, Two X-Shaped Intersections And The Existing Gha Gallery With The Installation Of Compressible Materials Beforehand; O Carrying Out Civil Engineering Works In The Existing Grd6 Gallery; O The Carrying Out Of Ancillary Works, Such As The Construction Of Works Linked To The Ha Cell Demonstrator Program In The Ger2 And Gha Galleries (Opening Of The Retaining Walls, Support Blocks And Berthing Blocks O The Carrying Out Of Civil Engineering Works Linked To The Experimentation And Demonstration Test Program (Other Than The Ha Cells), And In Connection With The Fire Studies (Such As The Installation Of Fire Partitions For Example) - The Continuation Of The Development Of The Network Of Underground Galleries At - 445 M Over Approximately 40M, As Well As Possibly Related Civil Engineering Works For Andra Needs With: O The Digging And Supporting Of 2 Galleries In Ø5.70 M O The Digging And Supporting Of An Enlarged Section In Ø6.70 At The End Of One Of The 2 Galleries. Other Preparatory Tests May Be Requested. Take Place In The Underground Laboratory, On The Surface Installations, On One Of The External Sites Attached To The Cmhm Or Any Other External Site At The Request Of Andra