Services

    There are many types of possible solutions  for foundation support. Finding the right one for your project needs ensures that you get the support that you need. South Jersey Helical Piers and its associated engineering experts select the correct solution from range of available techniques. To view the relationship between our certified techniques and their applications please view our Application Matrix.

The following is a list of foundation support solutions that are used by South Jersey Helical Piers for new construction or already existing structures.

Conventional Helical Piles

A helical pile is an assembly of mechanically connected steel shafts with a series of pitched steel plated welded at specified locations on the lead section. The monitoring of the installation torque provides verification that the design capacity has been attained

These piles are screwed into the ground, like a cork screw, using either machine mounted or hand-held hydraulic drill equipment. Helical pile can carry working load capacities up to 25 tons an can be installed with minimal headroom and in tight spaces.

The benefits of helical piles is that they have low mobilization costs, as well no spoils which allow conventional piles to be extremely competitive for pile loads of less than 25 tons.

Grouted Helical Piles

The patented Pull-down Micro-pile were developed for the soft clays in Western Canada and provide higher working load capacity helical piles. There have been load tests that have verified a 100-ton working load.

Grouted helical piles can be installed with grout diameters of 4-8'' inches. Steel shafts sizes are available in sizes ranging from 1.5''- 2.5'' square inches. Unlike the conventional mini-pile process, there are no spoils with pull-down installations.

The load capacity of Pull-down Micro-piles is attained by either, end bearing on the helixes or friction between the soil and the grout, or a combination of both bearing and bond. The pile shaft can be installed with a casing to minimize down-drag forces.

Helical Tiebacks & Helical Nailing

With a correct soil type, helical tiebacks and soil nails can be more cost effective than grouted tiebacks. Tiebacks and soil nails are installed to a prescribed torque that is correlated to the ultimate tension capacity.
 

Micro/Mini Piles

Micropiles are small diameter piles (up to 300 mm), with the capability of sustaining high loads (compressive loads of over 5000 kN). The drilling equipment and methods allows micropiles to be drilled through virtually every ground conditions, natural and artificial, with minimal vibration, disturbance and noise, at any angle below horizontal. The equipment can be further adapted to operate in locations with low headroom and severely restricted access.

The load is mainly accepted by the steel and transferred via the grout to the surrounding rock or soil by high values of interfacial friction with minimal end bearing components, as in the case for ground anchors and soil nails. The majority of micropiles are between 100 and 250 mm in diameter, 15 to 30 m in length and 250 to 1000 kN in compressive or tensile service load, although far greater depths and much higher loads are also being use.