Helical piles offer a versatile, economic deep foundation solution for applications in weak or looser soils that do not require high resistance to lateral movement. They produce low environmental impact and are successfully used in wetlands or lakes for boardwalks, utility towers, pedestrian bridges, and docks. They are also used to underpin or repair existing foundations with settlement damage. Because they don’t require concrete to set, they can be installed relatively quickly and in smaller spaces.
Installing helical piles is like twisting a large screw into the earth. The helical flights along the main shaft are designed to penetrate soil and achieve a specific torque in order to achieve the desired load bearing performance. Installation relies on geotechnical reports to correctly calculate the torque conversion needed.
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