Less noise – Auger Cast in Place Grouted Piles are a drilled and pumped pile, not a driven pile. This eliminates the hammer impact noise created by driving piles.
No objectionable vibration – The elimination of a pile-driving hammer allows the installation of Auger Cast in Place Grouted Piles adjacent to existing structures without the danger of settlement or damage to existing footings, walls, other structural components, or nearby equipment caused by vibrations.
Auger Cast in Place Grouted Piles in many situations can offer a considerable cost savings to an alternate pile type. The total cost of the grout and reinforcing steel per linear foot can be considerably less than material for an alternate pile with the same load bearing capacities.
The length of Auger Cast in Place Grouted Piles is totally variable up to the maximum length that can be installed with the pile rig that is mobilized. On projects with variable pile bearing lengths, the material waste can be reduced because the material placement stops at the drilling grade. The pile contractor doesn’t have to try to select the appropriate material length for each pile location.
The size of the Auger Cast in Place Grouted Piles can be quickly changed using the same pile rig by simply changing the auger flighting and guide devices, allowing the installation of various sizes for load testing to determine the most efficient size or the installation of different sizes for different capacities on the same project.
An Auger Cast in Place Grouted Pile has a very irregular shape and rough surface in most soil conditions, maximizing the friction capacity of the pile.
Since an Auger Cast in Place Grouted Pile is cast in place there are no concerns with the shipment of over length pile material or handling or moving piles around the jobsite.
No casing required – During the installation of an Auger Cast in Place Grouted Pile, the earth filled auger maintains the shape of the pile hole during the drilling phase. The pressures produced by the head of grout in the auger during the withdrawal and grouting phase exceed the lateral pressures exerted by the soil, and while the gout is still fluid, the lateral pressures per foot of depth of the grout exceed those pressures per foot of depth of the soil.
An Auger Cast in Place Grouted Pile can be installed in limited headroom conditions – Auger sections can be manufactured to accommodate installation of Auger Cast in Place Grouted Piles inside existing buildings with a minimum clearance of 7 to 10 feet.
Soil at each pile hole can be inspected – The grout that is pumped into the pile displaces the existing soil for the entire length of the pile. This displacing action allows the soil along the length to be available for visual inspection and testing.
In varying soil conditions, prior to test pile installation probe holes can be drilled at different locations with the pile rig around the site. This allows the inspecting engineer to evaluate the soil conditions and determine the most effective test pile location at a very low cost since no material is wasted.