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Home : Services : Deep Foundations : Barrettes

BARRETTES

Nicholson Construction Company is continually at the forefront in utilizing innovative foundation techniques to meet the major geotechnical challenges of static soil-structure interaction problems in relation to deep foundation building techniques. To accomplish this, we use our state-of-the-art design and build capabilities to provide high-quality, cost-effective solutions.

One of these pioneering techniques that Nicholson employs involves the use of barrettes, also known as load bearing elements, which are excavated rectangular piles that are increasingly being used as foundations to resist large vertical and significant horizontal loads that can accompany the construction of diaphragm walls.

Diaphragm walls are most commonly used in areas with dense and historic urban infrastructure, where a very rigid earth retention system is required, where noise and vibration must be limited, where the geology and groundwater preclude the use of conventional earth retention systems and/or where dewatering is not practical.

The same techniques utilized in diaphragm wall construction can be used to form individual barrettes of various shapes including I, T, X or L to accommodate top-down construction.

For more information on Nicholson barrettes or any other specialty techniques, please call 412-221-4500 or contact us today.




Abingdon Heights, Arlington, VA
Nicholson designed and constructed a unique permanent earth retention system with barrettes and post-tensioned vertical anchors for a new condominium tower.

THE FACTS

Benefits of Barrettes

• Resistance to horizontal stress and to bending moments better than circular piles of the same section.
• Easy adjustment to structures, so that one single pile is sufficient under each column or bearing unit.
• Improved mobilization of lateral friction than a circular pile of the same section, because of a larger perimeter.
• The preferential application field is that of high bearing capacities: from 5 000 kN (Kilonewton) upwards.
• Starting from these dimensions, bigger or more rigid piles can be formed: bars, crosses, H-shaped piles, T-shaped piles.