deep foundations contractors inc

By: Deep Foundations  09-12-2011
Keywords: Anchors, Underpinning, Piles

Our fleet of powerful drills are able to install caissons to 4.9 metres (16 feet) diameter to depths of 40 metres (131 feet), in soil or rock.

Driven H-piles, pipe piles and timber piles provide a time-tested and economical deep foundation element for the support of a wide range of structures, including power plants, houses, bridges, factories and office buildings.

Micro piles are small diameter steel piles or rods that are drilled and grouted in place. They provide an excellent solution for soil stabilization problems as well as support for structures in soft soils and areas sensitive to vibration. Ideal for low-headroom conditions.

Conventional Underpinning

Supporting adjacent structures directly permits new construction to the property line, thus maximizing building area. Underpinning with reinforced concrete panels is done typically to depths of 4 metres (14 feet)

Drilled Underpinning

Using special techniques, our drills are able to install structural members directly under buildings to increase the depth of underpinning to over 15 metres (50 feet)

CFA piles provide a deep foundation where the noise and vibrations of driven piling cannot be tolerated and ground conditions prove challenging for the installation of drilled caissons. Up to 600 mm (24 inches) diameter CFA piles can typically carry loads up to 875 kn (100 tons) per pile. In 1989, we developed the first North American computerized monitoring system for CFA piles. The computer displays information to the operator to ensure quality control.

Load tests are required to confirm design assumptions and measure performance. Tests up to 9750 kn (1,100 tons) have been completed. That's over 2 million pounds!

Helical piles consist of a straight section of pipe that has helical flights welded to it. These piles are advanced using hydraulic equipment which literally screws the helical flights into the ground.

Uplift forces can be exerted on structures in the form of buoyant forces, wind forces creating overturning, and cantilevered loads on structures.

Water storage tanks constructed below the ground water table, wind turbines and cantilevered bridge decks are examples of these structures.

To resist these uplift forces tie down anchors are often used. These anchors typically consist of a steel-reinforcing member anchored into a soil or rock medium, and grouted into place with cement grout.

The anchors can be either post stressed of left as passive anchors depending on design requirements.

Keywords: Anchors, cfa piles, Piles, Underpinning,