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Large diameter Drilled Shafts

The Large Diameter Drilled Shafts are the solution most commonly used for offshore foundation of ports, bridges, and piers, using lost or recovered metallic casing.

LNG Terminal - Rio de Janeiro/ Brazil
Drilled shafts in soil and rock D=32".

OFFSHORE DRILLED SHAFTS ARE MADE THE USE OF HYDRAULIC DRILLING RIGS AND REVERSE CIRCULATION SYSTEM

In offshore drilled shafts, the mechanical excavation and underwater concreting are preceded by the insertion of a steel casing, generally with the use of a hydraulic or vibratory hammer. The drilling rig, when required, shall be setup on a fixed leg platform or a flat deck barge.

With special equipments, the drilled shafts can reach depths of up to 330ft (100m).

The Brasfond Group conducts special foundations projects in the presence of water depth by Brasfix (Brasfix Fundações de Obras Marítimas e Fluviais), established in 2000 to meet challenging projects with a high level of performance.

3rd Bridge over Orinoco River - Caicara Del Orinoco/ Venezuela
Hydraulic drilling rig with special bits for rock excavation and reverse circulation system.

Learn more about the Offshore foundations for bridges, harbors and piers

Specifications, construction sequences, case studies.

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