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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. - PowerPoint PPT Presentation
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Stormwater Management and Road Tunnel A “SMART” Solution
Transportation Research Board Committee ADC60Sustainable and Resilient Infrastructure WorkshopRandall J. Essex, P.E., Executive Vice President
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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
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But monsoon rains have created severe flooding and devastating destruction for decades
World’s Largest Flood Control Tunnel
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Initial Challenge: Divert the Flooding
Intercept upper river, and convey flows under city to lower river (blue)
During dry periods, use central third of tunnel to convey traffic (red)
Upper River
Lower River
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Discovery Channel Special: “Extreme Engineering”
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Major Hydraulic ComponentsUpstream water diversion structure and holding pond
Inlet structure
North Junction gates
Downstream detention pond
South Junction gates and pump station
Downstream diversion structure
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Physical Hydraulic Features
· Storage, surge shafts, and pumping
Sur
ge S
haft
0
10
20
30
40
50
-2000 0 2000 4000 6000 8000 10000 12000
Distance (approx scale)
Leve
l m d
atum
Upstream Tunnel (Upper Barrel)
DownstreamTunnel (Lower Barrel)
UpstreamHolding Pond
DownstreamStorage
Pond
Upper
Lower
Lower
Tunn
el In
let
Ground Levels
N J
unct
ion
Box
S J
unct
ion
Box
&
Pum
p S
tn
Upstream water gates
Road Gates in branch tunnels to exits
upstream and downstream
Downstreamwater gates
N V
ent S
haft
S V
ent S
haft
Sg K
lang
Sg K
eray
ong
Culvert
Rd Deck
Rd Deck
Out
let c
ulve
rt an
d ga
tes
Tunn
el O
utle
t Gat
esan
d P
ump
Stn
TWL
TWL
Min WL
Min WL
Div
ersi
on g
ates
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Gatehouses
North Ventilation
Shaft
North Gate House
Lower Deck Road Gate (rising flap)
(Upper Gate Above)
North Junction Box
Surge Shafts above
Plan on Lower Road Deck
To South Junction Box
Road entrance and Exit
Flood Flow
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Hydraulic Operation
NO STORM
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Hydraulic Operation
NO STORM
MOST STORMS (7-10/YR)
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Roadway Tunnel Operation
MAJOR STORMS (2 EVERY 5 YRS)
NO STORM
MOST STORMS (7-10/YR)
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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
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Flood water entrance
Video of Tunnel Flooding
Maximum diversion capacity: 280 m3/sec = 4.4 M gals/min)
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Bored Tunnels
· Twin 43 ft diameter TBMs· Pressurized face slurry shields· One-pass bolted and gasketed
segmental lining
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Bored Tunnels
· Twin 43 ft diameter TBMs· Pressurized face slurry shields· One-pass bolted and gasketed
segmental lining
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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
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Construction
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Construction
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Toll Plaza
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Entrance Ramp
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Lower Roadway Deck
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Upper Roadway Deck
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Exit Ramp
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M2 M3 M2 M3 M2 M3 M2 M3 M2 M3 2007 2008 2009 2010 2011
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50
0
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100
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Annual events2007 - 2011
Year
Annual eventM2 = invert onlyM3 = Lower deck
Cumulative events
2 2 1
Current Use
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Client Satisfaction
“With SMART under our belt we can be confident that we’ll be ready when a big flood arrives”
Contractor: MMC/ Gamuda JVEngineer: Hatch Mott MacDonald – sub to Gamuda