Channel Erosion Case-Study_ARMORMAX_Dec 2018

CASE STUDY

Erosion Control Application Drainage Channel

ARMORMAX® Engineered Earth Armoring System

WHAT:

TITAN SOLUTION:

Municipal drainage channel slope erosion.

The RM of Stanley was looking for a superior longer-term erosion control solution and engaged Stantec’s engineering services. After a series of consultations with Stantec, Titan proposed the ARMORMAX® Engineered Earth Armoring System which is an advanced flexible armoring solution designed specifically for severe erosion challenges. Proven to provide up to 75 years of design life ARMORMAX® consists of PYRAMAT®, woven three-dimensional High- Performance Turf Reinforcement Mats (HPTRM) with X3® fiber technology, and Engineered Earth Anchors (EEAs). In this application gabion baskets filled with rock were placed on the base-floor of the channel, and a total of 38,000 m² of ARMORMAX® was installed on the channel slopes. Being a winter installation, the extreme cold conditions made it challenging to penetrate the frozen ground with the system’s B1 Anchors and 5mm 18” spikes. Our installation crew quickly adapted and switched to 10mm- 12” pins which were within the acceptable specification range and allowed for successful installation. The channel was later hydroseeded by another contractor to ensure vegetative growth through the matts—critical to helping lock soil in place and protect against hydraulic stresses. After nearly one year we observed outstanding vegetation growth and continue to monitor the site. As vegetation increases and deeper vegetative root structure forms, we are confident that the system will solidify and perform optimally.

APPLICATION:

The application involved installation of 38,000 m2 ARMORMAX® with gabion baskets for a municipal drainage channel erosion control solution.

CHALLENGE:

The Reinland Drain is a municipal drainage channel in south Eastern Manitoba that holds and drains intermittent water flow from regional spring melt/breakup and peak discharge events. Failing rip rap rock from heavy run-off flows had been causing reoccurring erosion of the channel slopes—an on- going problem spanning 75 years.

CONVENTIONAL SOLUTION:

Rip rap had conventionally been used in this channel for erosion control but was continuously failing after storm/rainfall events causing massive undermining, and unfavourable costly results.

“designed specifically for severe erosion challenges and proven to provide up to 75 years of design life.”

View of channel with gabions at the floor base.

Channel Slopes with PYRAMAT® woven three-dimensional High-Performance Turf Reinforcement Mats and Engineered Earth Anchors.

www.titanenviro.com

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