The initial solution considered by the client was
-either to carry out a drain and surcharge solution, but this solution , to be applied very slowly due to very poor soil characteristics , was incompatible with the schedule for part of the plant and was rendered expensive by the need to haul the sand from 200 km away
-or to have all structures, including roads, drains, founded on RC square piles (40 to 50 m long): that solution was costly, and did not solve fully the problem of long term settlements (estimated at 1.5 m over the lifetime of the plant).Phase I did represent an area of 90 000 m² and phase II , 70 000 m². |