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LANGAN <br />SERVICES: <br />Pre- Tender and Proposal Support <br />• Support During Contract <br />Negotiations <br />• Geotechnical Engineering <br />• Geotechnical Interpretative Report <br />GBRJGDR Comparison Report <br />Support During Differing Site <br />Conditions Claim and Disputes <br />Observation and Monitoring During <br />Support of Excavation Installation <br />Observation and Monitoring During <br />Foundation Element Installations <br />Observation, Monitoring and Post- <br />Treatment Testing During Grouting <br />Trials for Pre- Treatment <br />LOCATION: <br />Miami, Florida <br />CLIENT: <br />Florida Department of Transportation <br />STRATEGIC PARTNERS: <br />Bouygues Travaux Publics <br />Jacobs Engineering Group <br />Hybfid,Mixed Face Tunnel Boring Machine <br />�TBM) <br />PORT OF MIAMI TUNNEL <br />J <br />pi <br />P= <br />The purpose of the Port of Miami Tunnel (POMT) will be to <br />relieve traffic congestion in downtown Miami by diverting car, <br />truck, and bus traffic from nearby highways directly to the Port <br />of Miami through twin 42-ft diameter tubes extending below <br />the main ship channel. This project will be the first large- <br />diameter tunnel constructed in Florida's challenging soft <br />sedimentary geology using a tunnel boring machine (TBM). <br />Project procurement utilized a concession approach in which <br />the concessionaire would be responsible for financing, <br />designing, building, and operating the tunnel. <br />As a consultant to the concessionaire's design and <br />construction team, Langan evaluated the subsurface data to <br />develop the geotechnical engineering parameters required for <br />design of the bored tunnel and the TBM. Additionally, Langan <br />provided recommendations for cut-and-cover construction, <br />temporary retention systems, tie-down anchors, bridge <br />foundation support and retrofit, roadway construction, and <br />TBM spoil disposal. Langan also provided support during the <br />pre-tender phase, assisted with technical proposal <br />preparation, and assisted with contract negotiations. <br />Subsequent to contract award, Langan observed and <br />monitored early-phase testing consisting of foundation load <br />testing and Cutter Soil Mixing for the U-wall and cut-and- <br />cover portions of the project, as well as numerous grouting <br />trials for the bored tunnel portion of the project to densify, <br />modify or reinforce the ground to facilitate tunneling with the <br />selected hybrid TBM system. <br />Cutter Soil Mix System for SCE Grouting Trial for Pre-Treatment <br />r7i <br />