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Subsidence causes and solutions A technical briefing Ian Kavanagh - PowerPoint PPT Presentation

Subsidence causes and solutions A technical briefing Ian Kavanagh BScEng(Structural) CEng MIEI Dip(Proj Man) PGradDip(Applied Building Repair & Conservation) To be discussed Subsidence: A. What it is B. What it isnt C. How its


  1. Subsidence causes and solutions A technical briefing Ian Kavanagh BScEng(Structural) CEng MIEI Dip(Proj Man) PGradDip(Applied Building Repair & Conservation)

  2. To be discussed Subsidence: A. What it is B. What it isn’t C. How it’s caused D. How it’s diagnosed E. How it’s repaired

  3. Escape of water…

  4. … from a plumbing system

  5. a. Firm consistency

  6. b. Soft consistency

  7. c. Very soft consistency

  8. c. Very soft consistency

  9. 1. Crack Patterns

  10. Secondary 1. Crack Patterns Subsidence Plane Primary Subsidence Plane Point of Rotation Downward Movement of Foundations

  11. Settlement of Fill Material or Made-up Ground

  12. Pyrite in stone:

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