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 isn’t
• C. How it’s caused
• D. How it’s diagnosed
• E. How it’s repaired

Escape of water…

… from a plumbing system

a. Firm consistency

b. Soft consistency

c. Very soft consistency

c. Very soft consistency

• 1. Crack Patterns

• 1. Crack Patterns

Secondary Subsidence Plane Primary Subsidence Plane Point of Rotation Downward Movement

• f Foundations

Settlement of Fill Material or Made-up Ground

Pyrite in stone: