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Engineering Geology and Planning
Everyone in planning and design of engineering
structures must give Geology serious consideration
Therefore use Geology and Engineering Geology(Geotechnology) as early as possible
- Conceptual Stage
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Engineering Geology considerations:
A major construction project- for example, a housing
development-might require a broad range of geologicmatters.
What do you think are some considerations?
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Some considerations:
- What kind of rocks are present?
1. Are they strong enough to support proposedstructure(s)?
2. Do they fracture easily?
3. Are there structural features within the rocks ?Such as folds, faults, bedding planes that makes therocks properties non-uniform and should be takeninto account?
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4. How porous and permeable are the rocks?5. Over a longer term, are they usually prone to
erosion or weathering?
WHAT ELSE?
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- What is the nature of soils present?
1. What is nature of soils permeability, strength and
stability?2. Are any slopes likely to give way to landslides?
3. Does the construction itself have potential to
trigger slides?
4. How cohesive is the soil? How elastic?
5. Do the soils tend to expand and contract asmoisture content varies?
WHAT ELSE?
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- What about WATER?
1. What quality and quantity of surface water are
available?2. What are the surface runoff patterns?
3. If septic tanks are planned, are soils properties and
topography appropriate for them?
4. Other considerations?
WHAT ELSE?
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Other Possible CATASTROPHIC HAZARDS?
1. Landslides and floods potentially affect many
areas.2. Do sinkholes occur in the area?
3. Has there ever been underground mining in the
area?
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THERE ARE LONG LIST OF GEOLOGIC
CONCERNS
AND IT DOES NOT EXHAUST POSSIBILITIES..!
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IMAGESTell me their stories
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Mistakes canMistakes can
cost livescost lives
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Do you have similar
IMAGES/STORIES to share?
E i i
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Engineering
GeologistsReal geologistsReal geologists
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EngineeringEngineering
Geology has aGeology has a
very differentvery different
literatureliterature
Siteworknotfieldwork
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Topics covered in EngineeringTopics covered in Engineering
Geology InvestigationGeology Investigation
Engineering soil & rock description
Desk studies
Remote sensing Site investigation
Geographical information systems
Hazards and risk assessment Introduction to hydrogeology
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Topics covered in EngineeringTopics covered in Engineering
Geology InvestigationGeology Investigation
Soil and rock slope stability analysis
Earthworks and foundation design
Tunnelling Aggregates
Waste disposal
Others
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On s i t e
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CarboniferousswampsVariscan folding
unconformityAncientseabed
Zoneofinteresttotheengineeringgeologist,i.e.thenaturallandscapeplustheeffectsofhumans
unconformityGranitebatholith24Caledonianfolding
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