Northwest Technical Luncheon – Calgary, AB
Date: Thursday, November 28
Time: 11:30 AM – 1:30 PM
Location: Danish Canadian Club | Tivoli Room
727 11 Ave SW Calgary, AB T2R 0E3
Cost: Free for Members | $20** for Non-Members
Join the NASTT Calgary Chapter for a luncheon on Strategies for Investigating Subsurface Challenges and Evaluating Geotechnical Risk for Complex Crossings.
Through the review of three case studies, this presentation will describe multiple best practices to consider when customizing a geotechnical investigation program, evaluating trenchless methodology feasibility and communicating project risk for complex trenchless crossings. A horizontal directional drill case study examines a crossing with significant elevation difference that crossed protected land parcels a highway and a sensitive river containing thick gravel deposits below the river that extended to the exit at the valley uplands. This urban microtunneling case study handles swelling shales with bentonite and coal seams containing buried glacial valley gravel deposits and a curved microtunnel for a railway crossing evaluates feasibility of several trenchless technologies through a risk assessment of challenging subsurface conditions comprising till with frequent cobbles and boulders having high strength and abrasivity.
About the speakers:
Lawrence Onwude is a civil and geotechnical engineer with Stantec Construction Ltn. with over 14 years of experience as a project and construction trenchless engineer. Lawrence has overseen over 60 major trenchless crossings and more than 400 conventional trenchless crossings, specializing in horizontal directional drilling, direct steerable pipe thrusting, microtunneling, and conventional techniques such as auger bores, pipe rams, down-the-hole hammers, and horizontal directional bores based on geohazard assessments for projects across western Canada.
Carrie Murray is a geotechnical trenchless leader with Stantec Construction Ltn. with over 25 years’ experience specializing in feasibility and risk assessment, design and construction of complex crossings using horizontal directional drilling (HDD), direct steerable pipe thrusting (DSPT), microtunneling, pipe jacking, auger bore and pipe ramming methods having completed hundreds of trenchless crossing projects.
