1. Introduction Flashcards
Definition
Subsurface
Geological units with different properties
physical, chemical, mechanical, hydrological …
Difference between
the work of Geologists and Engineers
Geologists:
provide the necessary infos
Engineers:
use infos when planning and construct
Aims of Engineering Geology
2
- Construction shall not result in negative effects
2. Securing natural hazards (prevent danger from humans and infrastructure)
Needed knowledge of the subsurface
3
- spatial relationship
- properties
- boundary surfaces
Difference between
Rock and Soil
Rock:
Naturally occuring sold solid aggregate of minerals
Soil: unconsolidated sediments (not solid)
Difference between
Science Soil and Geotechnical enineering Soil
Science:
soil formation
developed characteristics and critera for land use
Geotechnical:
acc. physical properties
Kürzel
GS
LL
PL
SL
Grain size
Liquid limit
Plastic limit
Shrinkage limit
Properties of Soil
3
- Grain size (GS) and petrography
- water issues
- under mechanical or hydraulic stress
Properties of Soil
Type of soil by
Grain size (GS) and petrography:
- GS & distribution
- LL, PL & SL
- Carbonate Content, organic, impurities
- clay
- water uptake capability
Properties of Soil
State of condition by
Water issues:
- Water Content
- Density
- Porosity, void ratio
Properties of Soil
Behaviour under mechanical stress
- plasticity
- compressive/tensile strength
- brittleness
- shear strength
Properties of Soil
Behaviour under hydraulic stress
- permeability
