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Types of investigation and their interpretation Part 1. Dr Martin Dobson. Investigations. Site geology Crack pattern description and interpretation Time of development of damage (autumn claims surge) Tree/shrub information (past and present growth rate)
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Types of investigation and their interpretation Part 1 Dr Martin Dobson
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
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
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
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
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
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
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
1. Site geology http://www.bgs.ac.uk http://maps.bgs.ac.uk/geologyviewer_google/googleviewer.html
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.
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
DNA fingerprinting • Very small roots • To distinguish between trees of the same species • To distinguish trees of different clones