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Roterra was engaged by a developer for a residential complex in the Rocky Mountains that included town homes, apartment buildings and amenities facilities.
Typically, helical piling is not a suitable deep foundation for mountainous terrain but Roterra was engaged by a long-term client to perform a feasibility analysis on various deep foundation technologies. Upon initial review of the geotechnical report and structural drawings by our team of geotechnical and structural engineers, we felt helical piling could be feasible. After a thorough probing and load testing program, Roterra worked with the owner to optimize the foundation system across the development with a mix of deep and shallow foundations.
Roterra Installs (664) Large Capacity Helical Piles in the Rocky Mountains to Start 2021
Roterra Piling (Canada)
25420 - 114 Avenue
Acheson, AB T7X 6M4
780-948-8556 or 877-503-9796
Roterra Piling (U.S.)
1095 Evergreen Circle, Suite #468
The Woodlands, TX 77380
713-948-8556 or 877-503-9796
The end solution was (664) helical piles supporting un-factored pile loads up to 800 kN. The helical piles themselves ranged in size from 114mm to 273mm (4 ½” to 10 ¾”) in shaft diameter with single and multi-helix configurations up to 32mm (1 ¼”) in thickness and 711mm (28”) in diameter. Final embedment depths ranged from 4 meters to more than 12 meters (13 to 40 feet) with the changing subsurface conditions. Only 8 piles required termination depths different than our original projections from the testing program, an example of the depth of our experience. Final installation torques were as high as 190,000 kN-m (140,000 ft-lbs).