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A New Approach to Constructing Underground Stations

Learn about the innovative jacked arch and jacked deck methods used in the construction of underground metro stations, offering advantages such as reduced soil exposure, minimal surface settlement, and the use of high-quality precast units.

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A New Approach to Constructing Underground Stations

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  1. A New Approach to Constructing Underground Stations James Thomson C. Eng Jacked Structures SA www.jackedstructures.com JACKED STRUCTURES SA

  2. Jacked Installations for Large Structures Some Early Projects • Modular installation of foundations, abutments and piers • Box Jacking JACKED STRUCTURES SA

  3. Modular Concept JACKED STRUCTURES SA

  4. Wandsworth- 1969 JACKED STRUCTURES SA

  5. The Box Jacking Concept JACKED STRUCTURES SA

  6. Brent Cross -1974 JACKED STRUCTURES SA

  7. New Concepts The Jacked Arch The Jacked Deck JACKED STRUCTURES SA

  8. The Jacked Arch Concept JACKED STRUCTURES SA

  9. The Jacked Deck Concept JACKED STRUCTURES SA

  10. Cliffsend Underpass A 20m wide 126m long road underpass below rail tracks Client: East Kent CC Contractor: Volker Fitzpatrick Hochtief JV JACKED STRUCTURES SA

  11. Cliffsend Underpass Tender Scheme a a Volker Fitzpatrick Hochtief JV JACKED STRUCTURES SA

  12. Cliffsend Underpass Final Scheme Volker Fitzpatrick Hochtief JV JACKED STRUCTURES SA

  13. Cliffsend Road Underpass –Aerial View JACKED STRUCTURES SA

  14. Cliffsend Road Underpass Jacked Deck Face Excvation JACKED STRUCTURES SA

  15. Cliffsend Road UnderpassDeck Jacking Installation JACKED STRUCTURES SA

  16. Underground Metro Stations Installation by Jacked Arch and Jacked Deck Methods JACKED STRUCTURES SA

  17. Metro Stations-Arch Configurations Top Box with Piles Modular foundations and Walls JACKED STRUCTURES SA

  18. Metro StationsArch Configurations Foundation Box Foundation Tunnel JACKED STRUCTURES SA

  19. Four Platform Arrangement JACKED STRUCTURES SA

  20. Alternative Four Platform Arrangement JACKED STRUCTURES SA

  21. Jacked Deck Concepts JACKED STRUCTURES SA

  22. An underground station – piled abutments from a high level box and a jacked arch JACKED STRUCTURES SA

  23. Application of Jacked Deck to Launch Boxes Typically: 22m -24 m span Around 200m long Depth varying from 6m-10m JACKED STRUCTURES SA

  24. Advantages of the Jacked Arch and Deck Approach 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 JACKED STRUCTURES SA

  25. 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 JACKED STRUCTURES SA

  26. JACKED STRUCTURES SA

  27. JACKED STRUCTURES SA

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  29. JACKED STRUCTURES SA

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