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February 17, 2011

U-LINK LIGHT RAIL TUNNELS. Los Angeles MTA, Metro Gold Line Eastside Extension, Boyle Station. February 17, 2011. U-LINK LIGHT RAIL TUNNELS. OVERVIEW OF U220 PROJECT SLURRY WALL INSTALLATION CROSSOVER EXCAVATION TUNNEL EXCAVATION CROSSPASSAGE EXCAVATION QUESTIONS.

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February 17, 2011

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  1. U-LINK LIGHT RAIL TUNNELS Los Angeles MTA, Metro Gold Line Eastside Extension, Boyle Station February 17, 2011

  2. U-LINK LIGHT RAIL TUNNELS • OVERVIEW OF U220 PROJECT • SLURRY WALL INSTALLATION • CROSSOVER EXCAVATION • TUNNEL EXCAVATION • CROSSPASSAGE EXCAVATION • QUESTIONS Los Angeles MTA, Metro Gold Line Eastside Extension, Herrenknecht Shop

  3. U-LINK LIGHT RAIL TUNNELS 1. OVERVIEW OF U220 PROJECT Traylor Frontier-Kemper Joint Venture Bid Date March 25, 2009 Bid Price $309,175,274 NTP January 4, 2010 Four Interim Milestones Final Completion October 2, 2013 Liquidated Damages up to $20,000 per day

  4. U-LINK LIGHT RAIL TUNNELS 1. OVERVIEW OF U220 PROJECT RECONFIGURE SOUTH STANDS PARKING UTILITY RELOCATIONS AND DEMOLITION SITE SHORING AND MASS EXCAVATION SLURRY WALL EXCAVATION CROSSOVER BOX EXCAVATION AND BRACING

  5. U-LINK LIGHT RAIL TUNNELS 1. OVERVIEW OF U220 PROJECT • TWIN BORED TUNNELS EACH 11,400 FT LONG • 2 EA EARTH PRESSURE BALANCE TBMs WILL BE UTILIZED • BOLTED GASKETED PRECAST TUNNEL LINING • 16 EA CROSSPASSAGES EXCAVATED USING SEQUENTIAL EXCAVATION METHODS • GEOLOGY • Primarily stiff clay • Valleys of silt and sand • Groundwater table ranging from 55 ft to 200 ft above tunnel

  6. U-LINK LIGHT RAIL TUNNELS 1. OVERVIEW OF U220 PROJECT • MAJOR SUBCONTRATORS • OMA Construction • Site Excavation and Paving • Underground Utilities • Fencing and Construction Walls • Condon Johnson / Nicholson JV • Temporary Shoring • Slurry Walls • Hayward Baker • Jet Grout Block for North Link

  7. U-LINK LIGHT RAIL TUNNELS 1. OVERVIEW OF U220 PROJECT • TRAYLOR / FRONTIER-KEMPER JV SELF PERFORM • Shaft Excavation • Slurry Wall Bracing • Station Invert • TBM Tunnels • Crosspassage Excavation • Tunnel Sidewalk and Invert Concrete

  8. U-LINK LIGHT RAIL TUNNELS 2. SLURRY WALL INSTALLATION

  9. U-LINK LIGHT RAIL TUNNELS 2. SLURRY WALL INSTALLATION EQUIPMENT – MECHANICAL CLAMSHELL

  10. U-LINK LIGHT RAIL TUNNELS 2. SLURRY WALL INSTALLATION EQUIPMENT – HYDROFRAISE

  11. U-LINK LIGHT RAIL TUNNELS 2. SLURRY WALL INSTALLATION EQUIPMENT – DESANDING PLANT

  12. U-LINK LIGHT RAIL TUNNELS 2. SLURRY WALL INSTALLATION GUIDEWALLS

  13. U-LINK LIGHT RAIL TUNNELS 2. SLURRY WALL INSTALLATION EXCAVATION

  14. U-LINK LIGHT RAIL TUNNELS 2. SLURRY WALL INSTALLATION REBAR INSTALLATION

  15. U-LINK LIGHT RAIL TUNNELS 2. SLURRY WALL INSTALLATION CONCRETE POURING

  16. U-LINK LIGHT RAIL TUNNELS 3. CROSSOVER BOX EXCAVATION & BRACING

  17. U-LINK LIGHT RAIL TUNNELS 3. CROSSOVER BOX EXCAVATION & BRACING BRACING PRE-FIT UP AT SHOP

  18. U-LINK LIGHT RAIL TUNNELS 3. CROSSOVER BOX EXCAVATION & BRACING BOX EXCAVATION ADD PHOTO OF BOX EX

  19. U-LINK LIGHT RAIL TUNNELS 3. CROSSOVER BOX EXCAVATION & BRACING BOX EXCAVATION

  20. U-LINK LIGHT RAIL TUNNELS 3. CROSSOVER BOX EXCAVATION & BRACING BRACING INSTALLATION

  21. U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION • OVERVIEW OF TUNNELING TECHNIQUES • Rock: • Drill and Blast • TBM – Gripper and Shielded • SoftGround: • Digger Shield • Sequential Excavation Method • Compressed Air Shield • Earth Pressure Balance TBM • Slurry Pressure Balance TBM SDCWA, San Vicente Pipeline Tunnel, Reach 4 East, Slaughterhouse Shaft

  22. U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION DRILL AND BLAST MINING SDCWA, San Vicente Pipeline Tunnel, Reach 5 East, Muck Bay

  23. U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION DRILL AND BLAST MINING SDCWA, San Vicente Pipeline Tunnel, Reach 5 East, Muck Bay

  24. U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION DRILL AND BLAST MINING

  25. U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION HARD ROCK TBM MINING SDCWA, San Vicente Pipeline Tunnel, Reach 6, San Vicente Portal

  26. U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION HARD ROCK TBM MINING SDCWA, San Vicente Pipeline Tunnel, Reach 6, San Vicente Portal

  27. U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION HARD ROCK TBM MINING SDCWA, San Vicente Pipeline Tunnel, Reach 6

  28. U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION – EPB METHOD WHAT DOES EARTH PRESSURE BALANCE MINING MEAN? In basic terms, it means providing tunnel face support, by using excavated material, to prevent over-excavation and surface settlement. The excavated earth in the excavation chamber is used to balance the combined earth and water pressure acting on the face of the tunnel.

  29. 1 9 5 8 2 7 4 6 U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION – EPB METHOD WHAT ARE THE IMPORTANT PARTS OF AN EPB TBM? Tunnel face Cutterhead EPB Cells Excavation chamber Pressure bulkhead Thrust cylinders Screw conveyor Erector Tunnel lining 3 Courtesy Herrenknecht AG

  30. U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION – EPB METHOD HOW DO YOU “DO” EPB MINING? • Balance the chamber pressure with the ACTUAL earth and water pressure

  31. U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION – EPB METHOD HOW DO YOU “DO” EPB MINING? • KEEP THE CHAMBER FULL Void space Partially Full Chamber

  32. U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION – EPB METHOD HOW DO YOU “DO” EPB MINING? • KEEP THE CHAMBER FULL Void space Partially Full Chamber

  33. U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION – EPB METHOD WHERE IS EARTH PRESSURE BALANCE MINING UTILIZED? • SOFT GROUND i.e. SAND, SILT, AND CLAY • BELOW THE GROUNDWATER TABLE • “SPECIAL” GROUND CONDITIONS • IN PLACE OF COMPRESSED AIR TUNNELS

  34. U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION – EPB METHOD SHIELD AND TRAILING GEAR (see paper drawing)

  35. U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION – EPB METHOD SHIELD AND TRAILING GEAR

  36. U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION • CUTTING TOOLS • Cutters – 18 ea • Scrapers – 48 ea • Bucket lips – 16 ea • Rimbar tool – 1 ea • Rippers (optional)

  37. U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION TBM MAN LOCKS

  38. U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION TBM MAN LOCKS

  39. U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION

  40. U-LINK LIGHT RAIL TUNNELS 4. TUNNEL EXCAVATION

  41. U-LINK LIGHT RAIL TUNNELS 5. CROSSPASSAGES Los Angeles MTA, Metro Gold Line Eastside Extension, Crosspassage Excavation

  42. U-LINK LIGHT RAIL TUNNELS 5. CROSSPASSAGES Los Angeles MTA, Metro Gold Line Eastside Extension, Holed-Through Crosspassage

  43. U-LINK LIGHT RAIL TUNNELS 6. QUESTIONS? Los Angeles MTA, Metro Gold Line Eastside Extension, East Portal

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