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BALANCE CANTILEVER BALANCE CANTILEVER BRIDGEBRIDGE --CONSTRUCTIONCONSTRUCTION
Dr. Amorn PimanmasSirindhorn International Institute of Technology, Thammasat UniversityNorconsult Civil Engineering
Balanced Cantilever Construction
-Construction method for several bridges across the Chao Praya River
-Good for medium to long span bridge, from 60-150 m.
-No scaffolding required in the river.
Rama V Bridge: Main span = 130 m, 2 side spans each 95 m.
สภาวศิวกร
TromsoTromso Bridge, NorwayBridge, Norway80 m Span, Built in 195880 m Span, Built in 1958
RaftsundetRaftsundet Bridge, NorwayBridge, Norway298 m Span, Built in 1998298 m Span, Built in 1998
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NangklaoNangklao Bridge, ThailandBridge, Thailand84 m Span, Built in 198384 m Span, Built in 1983
PinklaoPinklao Bridge , Thailand Bridge , Thailand 114 m Span, Built in 1971114 m Span, Built in 1971
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Rama III Bridge , Thailand Rama III Bridge , Thailand 226 m Span, Built in 1996226 m Span, Built in 1996
Rama V Bridge , Thailand Rama V Bridge , Thailand 130 m Span, Built in 1999130 m Span, Built in 1999
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NewNew NonthaburiNonthaburi Bridge , Thailand Bridge , Thailand 160 m Span160 m Span
NewNew NangklaoNangklao Bridge , Thailand Bridge , Thailand 229 m Span229 m Span
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Existing Nangklao bridge
New Nangklao bridge
FREE CANTILEVER METHODFREE CANTILEVER METHODสภาวศิวกร
THE PRINCIPLE OF FREE CANTILEVERINGTHE PRINCIPLE OF FREE CANTILEVERING
PROCEDURE OF BALANCED CANTILEVERINGPROCEDURE OF BALANCED CANTILEVERING
1) ASSEMBLY OF FIRST TRAVELLER
2) FIRST TRAVELLER READY FOR CONCRETINGASSEMBLY OF SECOND TRAVELLERS
3) SECOND TRAVELLER READY FOR CONCRETING
4) STRESSING OF CABLES5) ADVANCING OF TRAVELLERS CONCRETING OF THIRD SEGMENT
FIRST TRAVELLERS READY FOR CONCRETING OF FOURTH SEGMENT1
2
3
4
5
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TYPICAL CABLE LAYOUT
TWIN WALL TYPE PIER
CROSS CROSS -- SECTIONSECTION
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BOXBOX--GIRDERGIRDER
Jetty Jetty
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สภาวศิวกร
Platform Platform PrecastPrecast Element Element
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PierheadPierhead
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PierheadPierhead
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11
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Segment Segment
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Segment Segment
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Concrete BarrierConcrete Barrier
Aphetic Topping Aphetic Topping
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CANTILEVERING ON ONE PIERCANTILEVERING ON ONE PIER
VIEW VIEW OF BRIDGE DURING OF BRIDGE DURING CANTILEVERINGCANTILEVERING
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MID SPAN CLOUSUREMID SPAN CLOUSURE
CONNECTED AT MIDSPANCONNECTED AT MIDSPAN
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