Common applications for augercast piling are supporting and anchoring tanks, high rise buildings, towers and pools.

Augercast Piles are installed by rotating a continuously flighted shaft auger (CFA) into the soil to a predetermined depth. As the auger withdraws, high strength cement grout is pumped in through a hollow shaft. High strength cement grout is pressure pumped through the hollow shaft. The grout column that has formed hardens, and becomes an auger cast pile. If reinforcement is required, it can be installed before the cement grout has set.

Augercast Pile

An augercast pile, often known as a CFA pile, is formed by drilling into the ground with a hollow stemmed continuous flight auger to the required depth or degree of resistance. No casing is required. A high slump concrete mix is then pumped down the stem of the auger. While the concrete is pumped, the auger is slowly withdrawn, lifting the spoil on the flights. A shaft of fluid concrete is formed to ground level. Reinforcement placed by hand is normally limited to 40 feet in depth. Longer reinforcement cages can be installed by a vibrator, or placed prior to pouring concrete if appropriate specialized drilling equipment is used.

Augercast piles cause minimal disturbance, and are often used for noise and environmentally sensitive sites. Augercast piles are not generally suited for use in contaminated soils, due to expensive waste disposal costs. In ground containing obstructions or cobbles and boulders, augercast piles are less suitable as damage can occur to the auger. An alternative to augercast piles in contaminated soils areas would be the (GDP) Grout Driven Pile.

The advantages to augercast piling are:

Augercast Piling is recommended when constructing for large loads, when working with poor soil quality at shallow depth, or when site constraints make other applications impossible.