TUNNEL DESIGN & CONSTRUCTION

ASC wrote the “Road Tunnel Design Guidelines” for the Federal Highway Administration (FHWA), used, nation-wide, in the design of Road Tunnels; and sold, world-wide, by the US Department of Commerce. Analysis & Solutions Consultants (ASC) is your partner for cost effective and innovative tunnel design. Special expertise is available for the design of new tunnel and station structures, waterproofing of underground structures, and rehabilitation of existing tunnels and other underground structures. With over 40 years of experience in Design, Retrofit, Value Engineering, Peer Review, and Construction Management/Monitoring of tunnels, transit and highway structures; Dr. Dots Oyenuga has consulted on over twenty tunnel projects Past project experience include: design, engineering, and construction support services for a portion of the H3 Tunnels in Hawaii; technical review of seismic retrofit design of the Posey/Webster Street immersed tube tunnels in Oakland/Alameda; the Point Loma Tunnel Outfall Onshore; the Point Loma Tunnel Outfall Offshore; Tunnel Value Engineering for VTA/BART on the $4.2 billion BART to Milpitas, Santa Clara and San Jose project, involving numerous bridges and 4.5 miles of bored tunnels in downtown San Jose.

Construction methods include:

• Mined Tunneling Methods (e.g. NATM, SEM, Shotcrete Method, SES),
• Mechanized Tunneling Methods (e.g. TBM, EPBM, Shield Tunneling)
• Open Cut Methods (e.g. Cut & Cover, Top-Down).
• Doorframe Slab Method: for tunnels with shallow overburden
• Barrel Vault Method: for tunnels in soft, loose ground
• Caisson Method: for mined tunnels under water, e.g. river crossings

Design Services include:

• Feasibility Studies
• Comparative Studies of Tunneling Methods
• Conceptual and Preliminary Design
• Final Design
• Cost Estimates
• Value Engineering
• Waterproofing Design
• Tunnel Ventilation and Emergency Evacuation Design.
• Waterproofing System for all underground structures