Post on 21-Dec-2015
transcript
JAMES THOMSON C. ENGJACKED STRUCTURES SA
WWW.JACKEDSTRUCTURES.COM
JACKED STRUCTURES SA
A New Approach to Constructing Underground
Stations
Jacked Installations for Large Structures
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Some Early Projects
Modular installation of foundations, abutments and
piersBox Jacking
Modular Concept
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Wandsworth- 1969
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The Box Jacking Concept
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Brent Cross -1974
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THE JACKED ARCH THE JACKED DECK
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New Concepts
The Jacked Arch Concept
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The Jacked Deck Concept
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A 20M WIDE 126M LONG ROAD UNDERPASS BELOW RAIL TRACKS
CLIENT: EAST KENT CCCONTRACTOR: VOLKER FITZPATRICK
HOCHTIEF JV
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Cliffsend Underpass
Cliffsend Underpass
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Tender Scheme
aa
Volker Fitzpatrick Hochtief JV
Cliffsend Underpass
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Final Scheme
Volker Fitzpatrick Hochtief JV
Cliffsend Road Underpass –Aerial View
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Cliffsend Road Underpass Jacked Deck Face Excvation
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Cliffsend Road UnderpassDeck Jacking Installation
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INSTALLATION BY JACKED ARCH AND
JACKED DECK METHODS
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Underground Metro Stations
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Metro Stations-Arch Configurations
Top Box with Piles Modular foundations and Walls
Metro StationsArch Configurations
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Foundation Box Foundation Tunnel
Four Platform Arrangement
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Alternative Four Platform Arrangement
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Jacked Deck Concepts
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An underground station – piled abutments from a high level box and a
jacked arch
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TYPICALLY: 22M -24 M SPAN
AROUND 200M LONG DEPTH VARYING FROM 6M-10M
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Application of Jacked Deck to Launch Boxes
• By breaking down the process into elements reduces the exposed soil face • Minimises jacking forces and reaction arrangements.• Continuous support of the excavation with a full structural lining • Surface settlement is minimal • Use of precast units allows higher quality construction
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Advantages of the Jacked Arch
and Deck Approach
• A wide range of geometry and configurations • Installation to very close line and level tolerances• Methods are applicable to both shallow and deep structures• Provides greater clear spans over much longer drive lengths.• Small launch platform area
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Advantages of the Jacked Arch
and Deck Approach
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