Please enable JavaScript.
Coggle requires JavaScript to display documents.
Introduction of Geotechical (Types of rock (Sedimentary rock formed by the…
Introduction of Geotechical
Geotechnical engineering
branch of civil engineering concerned with the engineering behavior of earth materials
Soil mechanics
is a branch of engineering that describes the behavior of soil
Types of rock
Sedimentary rock
formed by the lithification (cementing,compacting,hardening) of existing rock or the bones, shells and pieces of formerly living things.(e.g. sandstone, limestone, shale)
Metamorphic rock
are usually created when they come under extreme pressure such as under many thousands of feet of bedrocks of though being crushed at the junction of tectonic plate (e.g. marble, gneiss, scoria)
Igneous rock
formed by molten liquid minerals known as magma that lie's below earth's crust (e.g. granite, basalt, gabbro)
Soil Classification
Organic soil
e.g. Peat soil
Not suitable in supporting foundation or structure
150-300mm from soil surface
Transported soil
Glacial soils
Lacustrine soils
Alluvial soils
Marine soils
Loess
Sand dunes
Colluvial soils
Residual soil
Intermiadiate zone-
where there is some weathering at the top part of the zone, but there is deposition towards the bottom part of the zone
Upper zone
- where there is high degree of weathering and removal of material
Partially weathered zone
- where there is the transition from the wearthered material to the unweathered parent rock.
Disintergration of rock
* Mechanical weathering
Plant roots
Frost
Thermal expansion
Abrasion
Biological decomposition
The breakdown of organic matter in soils is done entirely by the microorganisms
Bacterias and other micoorganisms induce chemical charges in their surrondings by producing organic acids, which helps in weathering of soils *
* Chemical decomposition
Oxidation
Hydration
Carbonation
Leaching