1 / 23

Kansai International Airport (Phase-I) Foundation Case Study

Kansai International Airport (Phase-I) Foundation Case Study. By Rajul Teredesai CE 5333-Foundation Engineering Spring 2005. Overview. Kansai International Airport (KIA). Key Features. Located on a biggest man-made island in Osaka Bay, Japan Constructed cost over $14 billion

jacob
Download Presentation

Kansai International Airport (Phase-I) Foundation Case Study

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Kansai International Airport (Phase-I) Foundation Case Study By Rajul Teredesai CE 5333-Foundation Engineering Spring 2005

  2. Overview Kansai International Airport (KIA)

  3. Key Features • Located on a biggest man-made island in Osaka Bay, Japan • Constructed cost over $14 billion • The island of 4 X 1 km, constructed in around 18m of water, entirely from landfill • Project Started in 1986 • Opened for flights in 1996 • The ASCE named KIA the #2 civil engineering project of the 20th century, second only to the Panama Canal

  4. Kansai Airport Aerial View

  5. Construction of Airport

  6. Bore Hole Locations

  7. Subsurface of the Kansai Airport Foundation

  8. Seawall Construction • Up to 40 ft. above sea level • Tripod blocks on seaward side for dissipation of wave energy

  9. Seawall After Completion Seawall Construction

  10. Mechanism of Sand Drains

  11. Advantage of Sand Drains The weight of the piled sand forces the water in the clay to move outward along the sand piles.

  12. Application of One Million Sand Drain at KIA

  13. Reclamation • Three distinct grades of sand, gravel and rock from nearby mountains • Four years and 750 million cubic feet of fill • Transportation on • Ground: Conveyor • Water: Barges

  14. KIA Terminal Building Architect: Renzo Piano

  15. Settlement Predictions • Lack of experience with construction on deep deposit of diluvial clay • Expected settlement = 19 to 25 ft • Actual settlement = 27 ft (by the end of island construction in 1990) • It continued at the rate of 2 in/month

  16. Settlement Calculations • Consolidation Settlement: • Time Rate of Consolidation (Terzaghi 1925):

  17. What Went Wrong in Predictions? • Un-conservative estimation of consolidation settlement • Wrong estimate of the time required for completion of consolidation settlement • Ineffectiveness of the sand drains in achieving the required success 100%

  18. Incomplete Consolidation

  19. Underestimation of Excess Pore Water Pressure Airport Started Settlement Continued

  20. Coping With The Problem of Continued Settlement • Basement of the terminal was lined with a quarter of a million tons of iron ore. • Result: Island sank faster than the building it is trying to hold • Installation of hydraulic jacks under the colums • Result: No differential settlement between the columns of entire building

  21. Learning From Mistakes • Using data actual settlement data obtained from 1st phase of project • Analysis of 400-m-deep boring exploration • State-of-the-art soil test methods • Expected Settlement = 18 m • http://www.kald.co.jp/eindexframe.html

  22. References • A report by Justin Phalen, UC-Davis, 2002 • The official website of KIA http://www.kald.co.jp/eindexframe.html

  23. Questions?

More Related