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S tormwater M anagement a nd R oad T unnel A “SMART” Solution

S tormwater M anagement a nd R oad T unnel A “SMART” Solution. Transportation Research Board Committee ADC60 Sustainable and Resilient Infrastructure Workshop Randall J. Essex, P.E., Executive Vice President. World’s Largest Flood Control Tunnel.

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S tormwater M anagement a nd R oad T unnel A “SMART” Solution

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  1. Stormwater Management and Road Tunnel A “SMART” Solution Transportation Research Board Committee ADC60 Sustainable and Resilient Infrastructure Workshop Randall J. Essex, P.E., Executive Vice President

  2. World’s Largest Flood Control Tunnel Malaysia is one of the world’s fastest-growing economies. Its capital, Kuala Lumpur (KL), has been the powerhouse of this growth

  3. World’s Largest Flood Control Tunnel But monsoon rains have created severe flooding and devastating destruction for decades

  4. Initial Challenge: Divert the Flooding Upper River Intercept upper river, and convey flows under city to lower river (blue) During dry periods, use central third of tunnel to convey traffic (red) Lower River

  5. Discovery Channel Special: “Extreme Engineering”

  6. Major Hydraulic Components Upstream water diversion structure and holding pond Inlet structure North Junction gates Downstream diversion structure South Junction gates and pump station Downstream detention pond

  7. Physical Hydraulic Features • Storage, surge shafts, and pumping

  8. Gatehouses

  9. Hydraulic Operation NO STORM

  10. Hydraulic Operation NO STORM MOST STORMS (7-10/YR)

  11. Roadway Tunnel Operation NO STORM MOST STORMS (7-10/YR) MAJOR STORMS (2 EVERY 5 YRS)

  12. World’s First Bored Double-Deck Roadway Tunnel • 1.9-mile highway tunnel • Upper and lower decks • 2 x 11 ft lanes • Emergency lane • Design speed 40 mph • Indicated speed 35 mph • 800 ft curve radius • Headroom 8.2 ft • Cars only • 10 MW fire load • Electrical/Systems • full submergence

  13. Flood water entrance Video of Tunnel Flooding Maximum diversion capacity: 280 m3/sec = 4.4 M gals/min)

  14. Bored Tunnels • Twin 43 ft diameter TBMs • Pressurized face slurry shields • One-pass bolted and gasketed segmental lining

  15. Bored Tunnels • Twin 43 ft diameter TBMs • Pressurized face slurry shields • One-pass bolted and gasketed segmental lining

  16. Bored Tunnels • Twin 43 ft diameter TBMs • Pressurized face slurry shields • One-pass bolted and gasketed segmental lining • Mined total of 6.5 miles in two directions from single slot trench workers

  17. Construction

  18. Construction

  19. Toll Plaza

  20. Entrance Ramp

  21. Lower Roadway Deck

  22. Upper Roadway Deck

  23. Exit Ramp

  24. Current Use 2 2 1

  25. Client Satisfaction “With SMART under our belt we can be confident that we’ll be ready when a big flood arrives” Contractor: MMC/ Gamuda JV Engineer: Hatch Mott MacDonald – sub to Gamuda

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