Micro and Mini Helical Steel Screw Piles description

Micro and Mini Helical Steel Screw Piles

(1) For 14" (36cm) diameter foundation anchors, reduce allowable capacity by 20% per building code requirements. Not applicable to HS.

The nature of the proposed application usually gives a clue to the soil type. By determining the soil classification using geotechnical surveys or the Chance Soil Probe and a knowledge of the expected loads it is possible to decide on the most suitable anchor. In general the 60 round HS screw piles are for soils class 4 to 8.

The SS150 and SS175 square anchors and 89 round HS anchors work with soils from 8 to 3 and the rock version of the 89 round screw pile will penetrate soils up to class 1. Specific rock anchors perform well in class 0 soils but require a pre-drilled hole.

A wide range of termination components are produced to connect the pile to the load.

Micro and Mini Helical Steel Screw Pilesspecification

Micro and Mini Helical Steel Screw Piles

Micro and Mini piles, are a specialised type of piling and include various forms ofdriven pile and screw pile.

Micro Piles

Micro Piles are a form of pile that are drilled into the ground, with a drill head attched to the front end of the pile. As the pile is drilled into the ground, it injects grout into the surrounding soil to make the foundation as strong and supportive as possible. They are usually made of high quality galvanised steel, typically in diameters of 60 to 200mm.

Mini Piling

Mini piles are a form of Micro piles but are often have a smaller diameter than usual piles, they are used to support lighter structures.

Benefits

Micro screw piling has considerable benefits under difficult site conditions such as these:

• Groundborne vibration must be avoided.
• Physical site constraints apply (e.g. low headroom).
• Requirement to operate in temperatures that are unsuitable for concrete piling.
• Ground conditions are unsuitable for other foundations.
• Excavation or removal of spoil is problematic.
• Conventional piles would be too heavy (a mini pile is a lightweight pile).
• Access is restricted for conventional piling equipment.
• The structure may be subject to significant overturning moments.
• Environmental constraints apply (especially noise and fumes).

• Tension loads must be accommodated.