Gabbro Terminal

The subsoil in the port consists of very soft clay that makes an unsuitable foundation for heavy machinery. For this reason, BESIX decided to follow the soil survey, a task that is outsourced, in real time. In this way, it could adapt its design to the findings much more quickly and – if necessary – commission a further survey right away. The advantage of this turned out to be so great that BESIX also decided to opt for its own soil survey in other projects.

BESIX not only had to allow for the delicate state of the soil and the weight of the machinery, but also the tonnes of building materials piled up on the site. The weight of the raw materials exerts so much pressure on the subsoil that the foundation would be pushed aside. So BESIX designed a network of asymmetrically reinforced foundation piles.

Each pile is one and a half metres wide and was given extra reinforcement on the side on which the building materials are stored. A successful solution: it hasn’t been necessary to align the stackers and the conveyors - previously an annual task - for the last two years.

In order to ensure smooth communication between the engineers in Brussels and the site supervisors in Qatar, a design coordinator was appointed. He was present on site and made sure that everyone had the necessary information in good time. ‘Even more than elsewhere, a lot of importance was placed on follow-up meetings. The design coordinator was literally our eyes and ears on the site’, says project manager engineering Werner Vits.

Every step in the foundation works was carefully analysed and documented. ‘We’ve learnt lessons from this experience as a team. We can apply the new skills we’ve acquired from this to other projects’, says Werner Vits.

BESIX also remains available for advice, if required.