Géogrilles monoaxiales

Le nœud autoroutier au nord de Chambéry permet de relier la voie rapide urbaine (VRU) de Chambéry allant vers Aix les Bains au nord aux autoroutes A43 et l'A4. Afin de fluidifier le trafic, les travaux ont inclus un élargissement de certaines voies, la création de nouvelles bretelles et voies d'insertion. L'emprise au sol étant réduite, des ouvrages de soutènement sont nécessaires pour la retenue des remblais (bretelle 13. 10 sur 210m de longueur, bretelle d'accès A43 de 230m de longueur et surtout la voie d'insertion A41 vers Annecy sur près de 300m de longueur). Cette dernière comprend une section en rampe avec des murs de chaque côté et une section où le remblai s'appuie contre l'autoroute A41 et est soutenu par un mur côté Chambéry.

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A 12 000m² warehouse for storage of thousands of tons of soya had to be built on of low bearing, silty, fine hydraulic fills which are up to 4m in depth at the Durban Harbour area. These hydraulic fills are underlain by silty sand horizons which are interspersed by sandy clay and sandy clayey silts, which vary from 2m to about 20m in thickness. Calcareous sandstone, soft shale and siltstones were also found at depths of between 25-27m below ground. The water table was at 1. 6m below natural ground. The client needed the structure to be finished as quickly as possible. The challenge was to provide a suitable foundation to carry such huge loads, on such poor founding conditions, in the quickest time.

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The access road of a new retail center has been planned in Mechelen, Belgium, to let customers easily drive to the new shopping mall. Initially, the retaining wall for the ramp leading to the bridge abutment had been planned as a concrete L-retaining wall, but, thanks to the technical support of Maccaferri, the design has been changed in favour of 530 sqm MacRes System with 12. 000 lm of ParaWeb reinforcement. Due to the bad foundation soil characteristics, the contractor asked Maccaferri´s support also for the calculation and delivery of 1. 100 sqm of ParaLink 950 as basal reinforcement over piles. Smooth standard panels have been chosen.

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