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Dr Martin Dobson PowerPoint Presentation
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Dr Martin Dobson

Dr Martin Dobson

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Dr Martin Dobson

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  1. Types of investigation and their interpretation Part 1 Dr Martin Dobson

  2. Investigations • Site geology • Crack pattern description and interpretation • Time of development of damage (autumn claims surge) • Tree/shrub information (past and present growth rate) • Root identification including DNA testing • Trial pits (foundation depth) • Drain survey

  3. Investigations • Site geology • Crack pattern description and interpretation • Time of development of damage (autumn claims surge) • Tree/shrub information (past and present growth rate) • Root identification including DNA testing • Trial pits (foundation depth) • Drain survey

  4. Investigations • Site geology • Crack pattern description and interpretation • Time of development of damage (autumn claims surge) • Tree/shrub information (past and present growth rate) • Root identification including DNA testing • Trial pits (foundation depth) • Drain survey

  5. Investigations • Site geology • Crack pattern description and interpretation • Time of development of damage (autumn claims surge) • Tree/shrub information (past and present growth rate) • Root identification including DNA testing • Trial pits (foundation depth) • Drain survey

  6. Investigations • Site geology • Crack pattern description and interpretation • Time of development of damage (autumn claims surge) • Tree/shrub information (past and present growth rate) • Root identification including DNA testing • Trial pits (foundation depth) • Drain survey

  7. Investigations • Site geology • Crack pattern description and interpretation • Time of development of damage (autumn claims surge) • Tree/shrub information (past and present growth rate) • Root identification including DNA testing • Trial pits (foundation depth) • Drain survey

  8. Investigations • Site geology • Crack pattern description and interpretation • Time of development of damage (autumn claims surge) • Tree/shrub information (past and present growth rate) • Root identification including DNA testing • Trial pits (foundation depth) • Drain survey

  9. 1. Site geology http://www.bgs.ac.uk http://maps.bgs.ac.uk/geologyviewer_google/googleviewer.html

  10. 2. Crack pattern description and interpretation

  11. Typical damage • Small, usually diagonal, cracks which suddenly appear indoors in plaster work and outside in brickwork or render. • Cracks occur at weak points, such as around doors and windows • Cracks usually become noticeable in late summer. • The cracks will normally be wider at the top. • Doors and windows may also “stick” due to the distortion of the building.

  12. Basingstoke Road, Reading

  13. 3. Timing of damage

  14. 4. Tree/shrub information (past and present growth rate) • Measured survey • Species of tree/shrub • Water demand • Age (increment core) • Height/crown spread • History of management

  15. 5. Root identification including DNA testing

  16. 5. Root identification including DNA testing

  17. 5. Root identification including DNA testing

  18. DNA fingerprinting • Very small roots • To distinguish between trees of the same species • To distinguish trees of different clones

  19. 6. Trial pits (foundation depth)

  20. 6. Trial pits (foundation depth) 830 mm

  21. 7. Drain survey (CCTV)