Arch Engineers Ltd. delivered specialized geotechnical and geostructural engineering services for over 200 slope stabilization and shoring projects along the Trans Mountain Expansion (TMEP) and Coastal GasLink (CGL) pipeline corridors within 12 months. Working directly with general contractors handling excavation, grading, and blasting, Arch designed systems that ensured safe working conditions and long-term stability across complex, high-risk terrain.
To begin, our team analyzed borehole logs, test pit data, and geotechnical reports to evaluate site-specific soil and rock conditions. These assessments then informed structural designs of temporary and permanent shoring systems—ranging from mechanically stabilized earth (MSE) walls to sheet pile and shotcrete-faced slope retention systems. Each design matched the location’s unique geologic and hydrologic profile.
Many projects sat in steep, unstable terrain or near critical infrastructure like overpasses, temporary access bridges, and public roadways. Therefore, this required precision in both design and execution. Arch modeled slope behavior under static and dynamic loads. Additionally, we developed slope grading plans and designed cut-and-fill systems that considered safety factors for equipment loading, blasting vibration, groundwater, and weather variability.
Beyond stabilization, Arch provided constructible solutions to support worksite access and excavation in confined or geotechnically sensitive zones. By combining geotechnical data with structural modeling, our designs supported safe trenching, pipeline installation, and bridge abutment preparation. These solutions minimized risk and kept progress steady for pipeline spreads.
Overall, this extensive work demonstrates Arch Engineers’ ability to deliver high-volume, precise geostructural solutions under accelerated schedules. Consequently, our efforts support Canada’s most significant energy infrastructure projects.