Project Overview
The Valley Line LRT is an ambitious 13-kilometer rail project awarded to TransEd Partners with a budget of approximately 1.8 billion. This design-build endeavor includes a 30-year operational commitment, with the initial lines marking a significant milestone in modern urban transit development.
The Challenges
Urban rail demands stringent vibration control, particularly between sensitive receptors such as the Winspear Theatre, Winspear Studio, and Citadel Theatre. Additional challenges included:
- Stringent Vibration Criteria: Achieving N-1, PNC-15, and 25 dBA thresholds.
- Extreme Conditions: Operating reliably in temperatures as low as -40°C.
- Corrosion Resistance: Managing de-icing salt impacts while maintaining low corrosion rates.
The Solution
GERB engineered an innovative Floating Slab Track system featuring:
- A 0.7-meter thick slab with a 5.2 Hz vertical support frequency.
- Over 150 meters of dual track segmented into effective floating and transition sections.
- 500+ GSI elements for enhanced vibration isolation.
Rigorous testing, finite element analysis, and certification by an Alberta Licensed Engineer ensured the design met North American standards.
Overcoming Installation Challenges
Successful installation was achieved through:
- Collaboration: Tight coordination with design engineers, contractors, and authorities.
- Adaptability: On-site adjustments to meet variable conditions and extreme low temperatures.
- Adaptation to Extreme Conditions: Specific measures were implemented to ensure reliable installation even under severe weather challenges.
- Quality Control: Continuous oversight ensured each component met technical specifications.
The Outcome
GERB’s solution delivered significant vibration reduction, enhancing passenger comfort and protecting sensitive structures. The advanced design ensures long-term durability and reliability, setting a new standard in urban rail transit innovation.
