Geotechnical, Underground Structures and Tunneling

STV’s nationwide team of geotechnical, underground structures and tunneling experts supports the full breadth of the firm’s infrastructure and development projects, providing value with a combination of local knowledge and national expertise.

The team provides design, project management, and construction support services for new and rehabilitated infrastructure projects including tunnels (transit, roadway and water/wastewater); underground stations and structures; highways, railways, bridges, dams, levees, dikes, ports and dredging; airports; buildings; utility substations and transmission projects, and energy projects (solar, onshore and offshore wind).

STV’s engineers are skilled in a wide array of applications for geotechnical design, tunnels, underground structural design including rehabilitation solutions, ventilation, and fire life safety. With an understanding of the theory behind these programs, our team infuses proven techniques with innovative solutions to deliver projects to our clients and communities.

Other expertise includes:

• Onshore and offshore subsurface investigations
• Shallow and deep foundations
• Slope stability
• Natural and cut slopes – Rock and Soil
• Pavements and subgrades
• Excavation support, dewatering and underpinning
• Earth retaining structures
• Dredging, marsh enhancement and land reclamation
• Shoreline stabilization and coastal protection
• Ground improvement
• Geotechnical instrumentation and monitoring
• Marine geotechnical design
• Geotechnical earthquake engineering
• Geotechnical numerical modeling
• Cable routing studies and feasibility analyses
• Cut and cover structures
• Slurry walls and jet grout walls
• Secant/tangent piles
• Rock and soft ground tunneling
• Drill and blast
• Tunnel boring machines (TBM)/roadheader
• NATM/SEM
• HDD
• Microtunneling
• Tunnel liner design
• Tunnel ventilation and fire life safety