Project: Country Club of the Rockies Addition
Dealer: Techno Metal Post Pikes Peak Region
Location: Edwards, Colorado
Partner: RA Nelson
Engineer Involved: JAC Engineering, CTL Thompson
Project Goals and Challenges: Commercial helical pier projects in Colorado come with a higher level of prep work and pre-construction documentation than for residential projects. At this site, numerous technical aspects had to be performed to properly bid this project and to justify pier capacity including 4 test pier installations with recorded data, full-scale load testing, and extensive submittals and shop drawings of piers. After completing the extensive pre-construction process, we were able to complete the installation of the 79 piers in a total of 3 days. The soil profile had large amounts of cobble and rock at 8-10’ depth that required relocating a few piers. Engineers were also required to witness and record the installation of every pier installed as well as witness the dynamic impact testing using a TMP PJR impact hammer.
Type of Soil: Silty Clay, fill with large amounts of rock 3-12” in size.
Advantages using TMP: The TMP installation equipment was a perfect fit for this extremely small and confined mountain town construction site. We were able to maneuver with ease throughout the foundation excavation. Rough sloped mountain terrain was not a problem for the R2D, EM1, and ET1 machines. All 3 machines were crucial in the execution of this project. Our dual 10” and 12” helix piers allowed each pier to reach the required design load at the depth specified by the engineer. With higher torque being implemented on these piers, the reinforced coupling fully allowed this project to go smoothly without any product failures.
Materials used: (79) P3 10’ - 10”/12” dual helix, HD shop welded coupler, (79) ½”-6”x6” flat cap with P3 hole fully welded to piers, 7’ P3 HD coupler extensions where required.
Equipment used: EM-1, ET-1, R2D with PJR for hit testing, x2 Lincoln welders with 5/32” 7018 welding rod, Skid steer for material handling, mini excavator for removing surface-level boulders.
Bearing capacity: The required loads for this job at each pier cap location ranged from 29kips to 55 kips. Each reinforced concrete pier cap location had either 2, 3, or 4 piers installed to meet the required load as called out by the engineer.
Depth: Depths ranged from 10’-15’ deep depending on the location of the helical pier within the excavation. Some of the pier cap locations were stepped up at a higher elevation.
Structure Details: The structure was a large 2-story addition to the existing golf course Country Club. A reinforced concrete grade beam was then poured on top of the pier caps throughout the footprint of the building to complete the foundation. 8 of the 79 helical piers were also used in the concrete foundation of the elevator shaft.
Testimonials: The General Contractor was very pleased with our timeliness, professionalism, and efficient install. They had never seen installation equipment like ours and were blown away at how quickly we were able to complete the scope of work.