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Advances in design and management of engineered slopes Dr Adam - - PowerPoint PPT Presentation
Advances in design and management of engineered slopes Dr Adam - - PowerPoint PPT Presentation
Advances in design and management of engineered slopes Dr Adam Fisher What changes/advances have I seen over 24 years as a geotechnical professional? 2 I will do this from: u A quick look at geotechnical risk management and the framework it
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u A quick look at geotechnical risk management and the
framework it provides for the design and management of slopes
u Considering a few projects delivered, methods used and the
subsequent advances that may have changed the approach
u Discussing how the concepts of ‘Geotechnical BIM’ could
perhaps add some real value going forward
I will do this from:
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Geotechnical Risk / Project Management
‘Effective design offers one
- f the best ways of
minimising geotechnical risk’
u
Be systematic, phased so that key stages are not missed
u
Determine essential project requirements
u
Use conceptual design to identify construction methods least at risk from ground conditions and provide the
- ptimum solution
u
Use analytical techniques that recognise that ground conditions are uncertain
u
Compare the design with current or previous cases in similar ground
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Soper’s Wood Landslide – Bath
Jurassic Fuller’s Earth
Soil slope - 1994
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1
0.2
- 0.2
- 0.4
- 0.6
- 0.8
- 1
0.4 3.0 2.8 2.6 2.0 2.2 2.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.2
Horizontal Movement (m) Vertical Movement (m)
STATI ON: A3 Jan 1994 Aug 1994
A3
3 2.5 2 1.5 0.5
Horizontal Movement (m) Rainfall (mm)
400 350 300 250 200 150 100 50
Days since 19/1/1994
20 40 60 80 100 120 140 160
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Desk based research GIS, Google, BGS, historical maps etc Fundamental Approach Systematic/phased - unchanged Geomorphology/Terrain Drone, 3D terrain model, aerial photo Investigation / monitoring BS5930, Advances in methods and data handling (AGS) Analyses 3D ground model, software, EC7, Finite Element analyses Engineering Solutions Methods have evolved and some new
- ptions could be given consideration
– Electro Kinetic
Current Project
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Anchored rock slope
2001
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Western Australia
- Nailing
- Anchors
- Spaced piles
- Geomembranes
- Cut off walls
2014
- Risk based evaluations
- Drones
- 3D models
- Remote sensing
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2014
- Reinforced earth
- Gabion facing system
(Health & Safety)
- Material classification
Western Australia
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2017/18
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Process for generating and managing design, construction and
- perations data. It’s an approach not a product you can buy off the shelf.
BUILDING INFORMATION MODELLING/MANAGEMENT
Whole life Digital Data-3D
Agreed procedures, methods - data quickly captured, processed and shared Assessing data in context of all disciplines (organisations). Informed decisions. Retaining and building on data for projects life – doesn’t get lost.
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Anchored retaining wall Site Model
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