The basic principle of the screw pile was first developed in England by an Irish engineer, Alexander Mitchell in the 19th century. The first recorded use of helical piles was in the river moorings for ships, in 1836. Since then, they have been an industry staple when anchoring structures in place, such as lighthouses and piers.
Fast forward to today and helical screw pile, along with driven piling, are now recognised as the preferred method for the majority of construction. The classic screw design of a central column and fitted steel plates are what make the helical screw pile so sturdy and trusted.
Utilising the same idea, we at Advanced Mini Piling Systems start off with a lead section, screwing the Pile down, until the permitted torque kN is attained. If this is not the case, we continue to add sections via bolting, screwing the pile down into the underlying strata until our design torque kN or depth is reached.
| 60mm Round Shaft |
Maximum installation torque kN | 2.0 |
Ultimate material strength for axially loaded foundations | 80 |
Pile capacity at maximum permitted torque kN | 60 |
Torque limited kN with 2.0 safety factor | 30 |
Ultimate strength per helix Tension/Compression kN | 45 |
Working capacity per helix Tension/Compression kN with 2.0 safety factor | 23 |
| 60mm Round Shaft Heavy Duty |
Maximum installation torque kN | 4.0 |
Ultimate material strength for axially loaded foundations | 155 |
Pile capacity at maximum permitted torque kN | 120 |
Torque limited kN with 2.0 safety factor | 60 |
Ultimate strength per helix Tension/Compression kN | 90 |
Working capacity per helix Tension/Compression kN with 2.0 safety factor | 45 |
38mm Square Shaft | |
Maximum installation torque kN | 9.5 |
Ultimate material strength for axially loaded foundations | 300 |
Pile capacity at maximum permitted torque kN | 300 |
Torque limited kN with 2.0 safety factor | 150 |
Ultimate strength per helix Tension/Compression kN | 180 |
Working capacity per helix Tension/Compression kN with 2.0 safety factor | 90 |
45mm Square Shaft | |
Maximum installation torque kN | 13.5 |
Ultimate material strength for axially loaded foundations | 440 |
Pile capacity at maximum permitted torque kN | 440 |
Torque limited kN with 2.0 safety factor | 220 |
Ultimate strength per helix Tension/Compression kN | 220 |
Working capacity per helix Tension/Compression kN with 2.0 safety factor | 110 |
89mm Round Shaft | |
Maximum installation torque kN | 25 |
Ultimate material strength for axially loaded foundations | 700 |
Pile capacity at maximum permitted torque kN | 560 |
Torque limited kN with 2.0 safety factor | 280 |
Ultimate strength per helix Tension/Compression kN | 220 |
Working capacity per helix Tension/Compression kN with 2.0 safety factor | 110 |
| 60mm Round Shaft | 60mm Round Shaft Heavy Duty | 38mm Square Shaft | 45mm Square Shaft | 89mm Round Shaft | |
|---|---|---|---|---|---|
| Maximum installation torque kN | 2.0 | 4.0 | 9.5 | 13.5 | 25 |
| Ultimate material strength for axially loaded foundations | 80 | 155 | 300 | 440 | 700 |
| Pile capacity at maximum permitted torque kN | 60 | 120 | 300 | 440 | 560 |
| Torque limited kN with 2.0 safety factor | 30 | 60 | 150 | 220 | 280 |
| Ultimate strength per helix Tension/Compression kN | 45 | 90 | 180 | 220 | 220 |
| Working capacity per helix Tension/Compression kN with 2.0 safety factor | 23 | 45 | 90 | 110 | 110 |
Advanced Mini Piling Systems can install a varied range of helical screw pile systems across London and Southern England. We provide sizes ranging from 38 mm square shaft and 60 mm round shaft, which are installed manually, micro digger or any other hydraulically powered equipment. These are installed into larger diameters exceeding 600 mm, which needs a 30T excavator with a torque head of over 300kNM.
Depending on the foundation system required and the impact on the surrounding environment, our highly skilled and qualified engineers can install helical screw piles with machines as small as 750 kg and as large as 30T. This depends on the compression and tension of the required load.
Each project is individually designed by our engineers and the screw piles are designed and manufactured to suit your project’s criteria. When designing your project, our experienced team will visit the site in either Wiltshire or Somerset and factor in access, schedule, ground conditions and cost, which will provide you with the most economical solution to your foundation requirements.
Applications for helical screw pile systems include underpinning, new build foundation support, roadside structures, rail side structures, LV/HV power industry and telecom industry.
Our Piling Systems services include basement construction and piled retaining walls, driven piling, piled foundations, and more.
We are always happy to talk through our services in more detail so for more information please get in touch.