LOCATION: Memphis, TN
The Project
Memphis International Airport (MEM) is embarking on the Terminal Modernization and Seismic Program (TMSP), which includes a critical assessment of its sub-basement transit tunnels. Originally designed in the early 1970s to support a tram system and potential subway connections, these tunnels have remained abandoned as expansion plans evolved, and their structural integrity has significantly deteriorated over the decades.
Located within the New Madrid Seismic Zone, MEM’s original structures, including the tunnel system, are vulnerable to seismic activity. As such, addressing these tunnels is essential for ensuring compliance with modern building codes and enhancing overall safety during potential earthquakes.
To effectively seal the tunnels and enhance seismic resilience, Class II cellular concrete has been selected as the material of choice. This innovative concrete variant offers several advantages:
- Lightweight Composition: Class II cellular concrete is significantly lighter than traditional concrete, reducing the load on existing structures while maintaining strength and stability.
- Superior Insulating Properties: Its cellular structure provides excellent thermal insulation, contributing to energy efficiency in the surrounding areas.
- Enhanced Flowability: The material’s flowability allows for easier placement and filling of irregular spaces within the tunnel, ensuring a comprehensive seal.
- Durability and Longevity: Class II cellular concrete exhibits high resistance to environmental factors, making it ideal for long-term applications in infrastructure.
By utilizing Class II cellular concrete to fill the abandoned transit tunnels, MEM not only addresses immediate structural concerns but also preserves a fascinating aspect of the airport’s history. This project exemplifies a forward-thinking approach to modernizing infrastructure while ensuring safety and resilience in the face of potential seismic challenges.
