Avoiding breakouts in HDD

Avoiding breakouts in HDD

Avoiding breakouts is one of the biggest challenges in HDD work, especially in rural and protected environments. Ensuring the drill path is adapted to both the geology of the site and the pipe being installed is key. OPTIMUM engineers model ground behaviour before...
610m long microtunnel under the Seine

610m long microtunnel under the Seine

Immensely proud to have accompanied BESSAC and SADE during the now completed 610-metre-long, up to 30-metre-deep, AVN2500 microtunnel crossing under the River Seine in the centre of Paris. In a complex geological environment, the gravity-flow tunnel had to cross not...
Railway crossing Pont VII to Sainville

Railway crossing Pont VII to Sainville

Proud to have accompanied RTE throughout the Pont VII to Sainville trenchless crossing, now successfully installed. Drilling the curved 240m long HDD under an SNCF freight line in a heavily congested overground and underground environment called for the highest levels...
DCA annual congress

DCA annual congress

Last week’s DCA congress, held in the UK, was a truly pan-European event and a great knowledge sharing opportunity. In the “Role of drilling mud in the borehole” workshop, facilitated by François Gandard (OPTIMUM), Marco Reinhard (LEONARD WEISS), Henning Söker (AMC...
La Ciotat, Côte d’Azur

La Ciotat, Côte d’Azur

Sunny skies last week on the Côte d’Azur for the successful HDD installation of GRTgaz’s DN100 gas pipeline under the Marseille to Ventimiglia railway line in La Ciotat. Finding the right drill path was the key challenge for this project, since the crossing is in a...