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SEACAP 21/04 Mainstreaming Slope Stability Management – Hazard and Risk Assessment – to Laos Practitioners Theme 6 Engineering Geological Assessments 6.2 – Engineering Geological Mapping

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Page 1: Theme 6 Engineering Geological Assessments - GOV.UK

SEACAP 21/04Mainstreaming Slope Stability Management – Hazard and

Risk Assessment – to Laos Practitioners

Theme 6

Engineering Geological Assessments

6.2 – Engineering Geological Mapping

SEACAP 21/04

Initial Assessment of Slope Failure / Landslide

Topographic Survey

Engineering Geological Mapping

Ground Investigation & Monitoring – Yes/No?

Design of Stabilisation Works

Page 3: Theme 6 Engineering Geological Assessments - GOV.UK

SEACAP 21/04

Engineering GeologicalMap

Hydrology (surface water, stream erosion, ground water)

Vegetation &land Use

Geology -soil & rock properties

and weathering

Man madeFeatures

Slope angle& shape

Previouslandslides

Page 4: Theme 6 Engineering Geological Assessments - GOV.UK

SEACAP 21/04Road 13N - Km 260.3

shallow (translational)

failure

Rotational Failure

Page 5: Theme 6 Engineering Geological Assessments - GOV.UK

SEACAP 21/04

Tension Cracks

Road 13N - Km 260.3

Page 6: Theme 6 Engineering Geological Assessments - GOV.UK

SEACAP 21/04

Shallow failures

below and above road

Road 13N - Km 336.4

Page 7: Theme 6 Engineering Geological Assessments - GOV.UK

SEACAP 21/04

Road surface deformed

Road side- drain ‘lifted’

Road 13N - Km 336.4

Page 8: Theme 6 Engineering Geological Assessments - GOV.UK

SEACAP 21/04

Back Scarp

Road 13N - Km 336.4

Page 9: Theme 6 Engineering Geological Assessments - GOV.UK

SEACAP 21/04

Examples of Engineering Geological Maps

Examples from Laos (SEACAP) Sites

Km 260.3

Km 242

Km 317.9

Page 10: Theme 6 Engineering Geological Assessments - GOV.UK

SEACAP 21/04Road 13N - Km 242

Concrete surface

protection

Page 11: Theme 6 Engineering Geological Assessments - GOV.UK

SEACAP 21/04Road 13N - Km 317.9

Back Scarp??

Tension cracks

hidden in trees

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