Case Study #01346
Minnetonka Wetland Nature Preserve boardwalk project.This design build development required a quick, vibration-free solution that would not disturb the wetland surroundings. PierTech® Systems helical piers were brought in to satisfy the project demands.
The PierTech® helical piles consisted of: 230 2 7/8” (0.260wt) X 8”, 10”, 12” Helix 3/8”thk 20’ long. Pile design 20 kips compression load.
The PierTech® helical piles were installed in pairs of two over 1600 linear feet. These vibration free helical piles were installed to an average depth of 20 feet and terminated in load bearing strata. 230 piles were installed using a 12k PierTech® drive head. Once the pile installation was complete, cross bracing was attached to each pair and the boardwalk was assembled on top.