foundations 21 three cut-and cover sections of the marseille l2 bypass the marseille l2 bypass north-east of the city spie fondations is working on three cut-and-cover sections each requiring different techniques tailored to the specific challenges encountered in each section of this monumental multidisciplinary special foundations project the l2 bypass is a triple carriageway road that will bypass the centre of marseille and link the a7 motorway to the north with the a50 heading east the work is scheduled for completion in 2018 spie fondations is responsible for the retainment work and special foundations underpinning the construction site which spans a wide geographical area and presents specific complexities owing to its urban location the three covered sections require different techniques depending on the different levels of the water table and rock substratum including a diaphragm wall for the saint-jérôme interchange butt-jointed secant and lutetian piles for the florian interchange and the sainte-marthe section for the trench the spie fondations teams are required to adapt not only to geological constraints but also to a complex works schedule designed to allow traffic to circulate on either side of the future kilometre-long structure whilst maintaining a work rate sufficient to comply with the demanding overall project timetable the technical resources deployed are in keeping with the scale of the project and have been selected in order to meet the challenges posed by the geological structure complex schedule and work volume from engineering department through to technical teams over 50 people are committed to ensuring the successful completion of this complex project 3 cut-and-cover sections 2,680 piles 8,000 m 2 of diaphragm walls 34,000 m of drilling export the key to success netherlands with mast grundbau middle east french overseas territories spie fondations extended its operations far and wide in 2015 but without the least sacrifice to quality and responsiveness although staff in france provides support for overseas projects it is at local level that success is won as shown by the acquisition of turnkey excavation and soil treatment contracts in qatar and abu dhabi in the overseas territories after projects in martinique in 2014 last year reunion island was the setting for a complex project masterminded by spie fondations on difficult ground in order to lay the foundations for the grande chaloupe viaduct on the coastal road on the basis of this success the subsidiary was awarded another similar contract this time for the abutments of the main viaduct
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