GZA is routinely engaged in the design of support of underground construction. For both temporary and permanent support systems, GZA uses modeling and other analytical tools to prepare complete design packages from simple cantilever systems to deep cuts with multiple support levels including:

• Internally Braced Excavations
• Tieback Supported Excavations
• Soldier Pile and Lagging Walls
• Secant and Tangent Pile Walls
• Soil-Mix Walls
• Sheet Pile Walls
• Slurry Walls
• Soil Nail Wall
• Mechanically Stabilized Earth Walls
• Retaining Walls