Culvert Lining Replacement

The conventional solution would be to hard armor the culvert headwalls with rip rap. Rip rap is extremely hard to find in Saskatchewan. In addition it is very expensive and does not perform well.

The Titan Solution

Titan recommended non woven geotextile be placed in bottom of trench and Titan Earth Grid™ be laid on top of the non woven. Sand was then laid on top as a bedding that was compacted. The culvert was placed in the trench, with backfill put around the culvert and the entire area was compacted.

The RM put the 6oz non woven geotextile with the Titan Earth Grid™ on top of the compacted fill above the culvert approximately 450mm under the roadway top, making sure to extend past the trench into the solid roadway. Providing excellent ground stabilization for vehicle traffic. Both ends of the culvert slopes were prepared for the Concrete Canvas® (CC), keeping in mind the 4 key installation principles. Twenty-five square meters of CC8 batch rolls were installed on both ends of the culvert outfalls. The CC edges were all anchored and fixed into an anchor trench. Hydration was completed using an onsite water source. The anchor trenches were then back filled.

Concrete Canvas® general installation guidance, generic drawings of the installation process, along with fixing and jointing details were provided.

The RM did the entire installation with out any further questions or issues.

Concrete Canvas® (CC) is a Geosynthetic Cementitious Composite Mat (GCCM), a factory-produced material combining cement within geosynthetic layers that hardens when hydrated for erosion control and weed suppression.

Achievement

The RM of Bengough successfully completed the culvert replacement and headwall reinforcement without further assistance, achieving long-term durability and cost savings compared to conventional rip rap.