Presented by: Frank Guyamier

Transcription

1 FTBA Orlando Tuesday, March 20, 2012 Presented by: Frank Guyamier Project Engineer

2 P3 PROJECT PARTNERS Public Sponsors 90% Equity Partner Design/Build Contractor 10% Equity Partner VMS Operator Federal Support

3 Tunnel Experts Bouygues TP specializes in underground works, complex civil engineering projects, structural works as well as public highways, port and transport infrastructures. Currently 15,000 workforce at 18 projects around the world, including the Port of Miami Tunnel Project. Globally known for building The Chunnel (The English Channel Tunnel), completed in 1994, Bouygues extensive tunneling experience includes: 71 Tunnels around the world since Tunnels currently under construction (Hong Kong, Cairo and Miami) 45 (57%) of those tunnels built by shield TBMs

4 POMT Project

5 TWIN TUNNELS

6 Tunnels are 4200 ft. long (Previous 3900ft) +40 ft. under the bottom of Government Cut 5% Grade 5 cross passages Ground Improvement Required

7 Ground Improvement Watson & Dodge Island SOEs/Ground Improvement: CSM SOE Walls SOE Tie-backs Type I Tie-downs (Minipiles) Type II Tie-downs (Drilled Shafts) TBM Break In/Out Plug (CSM with Secant Pile Infill) SSM Column Ground Improvement CSM Barrettes

8 SOIL TREATMENT The complex and challenging Geology of South Florida required specific treatment to receive the TBM due to the shallowness and proximity of the twin tunnels: Overburden Barrettes Shallow Soil Mixing (SSM) CSM Barrettes Panels Shallow Soil Mixing 9 diameter SSM Tool deep

9 Overburden CTB Production for Overburden CTB up to elevation (1400cy) Overburden Construction: Assembling Concrete Panels

10 BCWF S EXTENSIVE COMPLEMENTARY GEOTECHNICAL INVESTIGATION The Complementary Geotechnical Investigation included: Standard penetration tests Cone penetration tests Sonic cores Wells for permeability and water flow testing Large diameter shafts On Watson Island, Dodge Island and in the Channel 152 holes in CGI, in addition to FDOT s 87 holes Equates to an average spacing, portal to portal, of one investigation hole every 32 feet

11 Grout Testing Program Mix Design: A pumpable, stable mix with low strength, high penetrability but high thixotropy, and excellent filtrate resistance (very difficult combination to achieve). Most unusual mix design which satisfies all criteria and has clearly performed well. This is indeed the optimum grout mix called for in the Geotechnical Baseline Report.

12 FORMATION GROUTING OPTIMUM MIX

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14 Break-out and ground improvement elevation PLUG LEGEND OVERBURDEN TUNNEL SOIL SHALLOW SOIL MIXING (SSM) Shallow soil mixing Overburden Plug

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16 WATSON ISLAND

17 WATSON ISLAND Shift of MacArthur Causeway and Expansion of Bridge necessary to build: The TBM Launching Pit on MacArthur Causeway: 400ft x 100ft x 50ft. The Tunnel access lanes. TBM assembled inside the pit. 42 diameter/410 ft. long. 12,000 lining segments TBM Break-In 11/11/11 Mines 20 hours a day Tunnel Support Operations under the bridge Tunnel Soil Management

18 Bridge Widening 10ft on each side 15 Sea Piers, and 6 Land-Based

19 Excavation of SOE

20 Tremie Concrete Pour

21 Dewatering Step Tremie Pour

22 PRECAST SEGMENTS 12,000 concrete segments will line the POM Tunnel 5,000+ produced to date! TBM Excavates and Erects Thickness: 2 Feet Width: 5 Feet / 7 Inches Length: 14 Feet / 6 Inches Weight: 12 U.S. Tons 150-Year Durability Req.

23 TBM Assembly / Break-In

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27 TBM Break-In

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35 TUNNEL OPERATIONS

36 TUNNEL SUPPORT OPERATIONS: Under MacArthur Bridge Batch Plant Water Treatment Plant Cooling and power systems Mechanical Storage TBM Access Ramp

37 Tunnel Operations The TBM started boring November 11, TBM runs 7 days a week, 20 hours a day = 14 months. TBM maintenance = 4 hours: 7:00 am to 11:00 am. Tunnel Spoil Management Area on Watson Island. To minimize impact to vehicle traffic, about 75% of spoils removal occurs between non-peak hours: 6:00pm and 7:00am. Street sweepers and water spray trucks operate daily to ensure roads remain clean. TBM is approximately 1,200 feet into its voyage.

38 Tunnel Excavation Approximately 400,000 cubic yards of material will be excavated during the construction of the two tunnels. As the TBM bores, the excavated material is evacuated from the tunnel using a conveyor belt or a piping system. The conveyor and piping systems transport the soil out of the tunnel to the Soil Management Area (SMA) on Watson Island. The excavated material traverses across MacArthur Causeway Eastbound and Parrot Jungle Trail by means of a fully enclosed overhead steel support structure.

39 Tunnel Spoils Management Conveyor System

40 Tunnel Spoils Management Spoils Basin

41 DODGE ISLAND

42 DODGE ISLAND Roadway reconfiguration ongoing on Dodge Island TBM Receiving Pit SOE and Excavation now complete. Tremie Concrete Pour and Dewatering next. Pit is similar in size to Watson: About 400ft wide, 100ft long, 40ft deep. TBM to break-through Summer SOE Box

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44 PROJECT HIGHLIGHTS

45 SAFETY FIRST BCWF s Zero Tolerance Total Man Hours to date 1,380,972 Total Work Days to date 800 Days Total Lost Time Accidents ZERO» SafetyStream

46 The Future

47 QUESTIONS?