1 / 31

DSI – Ductile Iron Micropiles

DSI – Ductile Iron Micropiles. International Society for Micropiles London, May 2009 Florian Stützel, DSI-TS. Agenda. Introduction Production Installation Load capacity Summary Video. Agenda. Introduction Production Installation Load capacity Summary Video. Introduction.

stevendiaz
Download Presentation

DSI – Ductile Iron Micropiles

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. DSI – Ductile Iron Micropiles International Society for MicropilesLondon, May 2009 Florian Stützel, DSI-TS

  2. Agenda • Introduction • Production • Installation • Load capacity • Summary • Video

  3. Agenda • Introduction • Production • Installation • Load capacity • Summary • Video

  4. Introduction • Driven tube • Ductile cast iron

  5. Agenda • Introduction • Production • Installation • Load capacity • Summary • Video

  6. Agenda • Introduction • Production • Installation • Load capacity • Summary • Video

  7. Production • Centrifugal casting

  8. Production • Heat treatment • Transformation grey  ductile cast iron

  9. Agenda • Introduction • Production • Installation • Load capacity • Summary • Video

  10. Agenda • Introduction • Production • Installation • Load capacity • Summary • Video

  11. Pile head Soft soil Pile tube Soft soil Coupler Medium dense gravel Loose sand concrete Dense sand Pile shoe Rock Installation Drive & grout= skin friction Dry driven= end bearing

  12. Installation - Endbearing piles • Usually non-grouted • Driven until a certain set-criteria is fulfilled (e.g. progress < 20 mm / minute) • If grouted piles are driven to that set, then the pile is basically an endbearing pile with additional load bearing capacity from skin friction

  13. Installation - Endbearing piles Foot for end bearing piles

  14. Installation - Endbearing piles

  15. Installation Friction piles • Simultaneously driven & grouted • Driven into a layer of “good” soil • Steady control and monitoring of driving progress required

  16. Friction piles

  17. Installation - Friction piles

  18. Agenda • Introduction • Production • Installation • Load capacity • Summary • Video

  19. Agenda • Introduction • Production • Installation • Load capacity • Summary • Video

  20. Load capacity • End bearing piles are driven to sete.g. progress less than 20mm / minute • Skin friction piles can be stopped before full set

  21. Load capacity - Friction piles 1st information: soil-expertise

  22. Load capacity - Friction piles 2nd information: penetration test with DPH

  23. Load capacity - Friction piles 3rd information: Actual driving record

  24. Load capacity - Friction piles Comparison

  25. Load capacity - Friction piles • Driving stopped after 6 m protrusion in a layer, where the driving time exceeded 30secs / 1m • 6m x 0.63m²/m x 150 kN/m² = 570 kN

  26. Load capacity - Friction piles Pile test

  27. Load capacity - Friction piles Pile test load / time Verticaldisplacement [mm] load / displacement - curve Load [kN]

  28. Agenda • Introduction • Production • Installation • Load capacity • Summary • Video

  29. Agenda • Introduction • Production • Installation • Load capacity • Summary • Video

  30. Summary • Installation by excavator • Suitable for restricted area • No break down of pile head • Installation into difficult ground condition • No wastage of pile section • Easy & fast

  31. DSI – Ductile Iron Micropiles International Society for MicropilesLondon, May 2009 Florian Stützel, DSI-TS

More Related