Mass movements
Different mass movements occur on slopes under different conditions. We'll look at four types; rockfall, mudflow, landslip and soil creep.
Rockfall
Rockfall is the rapid, free-fall of rock from a steep cliff...
Mass movements
Slope creep
Slope softening :...
Terzaghi : Movement of loosened rock toward a tunnel
Terzaghi's concept of movement of loosened rock toward a tunnel and transfer of rock lo...
River Erosion, Transport and Deposition
Describes the processes of erosion, transport, and deposition by running water
Sour...
Suspended load -- Bedload
Bedload: ensemble des particules en mouvement par roulement, traction et saltation sur le lit d'un cours d'eau. Il s'agit généralement de galets et de sable.
Suspended load: partie de la charge sédimentaire d'un écoulement, transportée...
Engineering geology in hot deserts
In this article the expression "hot deserts" refers to areas characterized by a lack of vegetation cover, non-polar environments, dry, arid or semi-arid deserts.
The low rainfall conditions are essentially due to zonal tropical climates (e.g...
Settlement: Fundamentals of Soil Compressibility
Fundamentals of Soil Compressibility&nbs...
Différents types de barrages en terre : Earth Dams
A) Homogeneous Dam
B and B') Zoned Dams
C) Rockfill Dam
Source : thèse Delacquis 1985 "Etude géotechnique des séries détritiques des contreforts vosgiens de Hte Saône et du Territoire de Belfort...
La fonte du pergélisol -- the melting of the permafrost -- Techniques
Fonte du pergélisol sous les fondations de bâtiments donnant lieu à des tassements différentiels (DIFFERENTIAL SETTLEMENTS UNDER FOUNDATIONS) :
Techniques :
...
Incroyable "Tsunami de boue"
A dramatic landslide in eastern Russia gradually swallowing up a road and railway, knocking down trees and power lines, and dragging heavy equipment.
...
'Wandering stones' of Death Valley explained
Link to the article : here...
Geotechnical engineering : one picture test
Are you a geotechnical engineer, a structural engineer, or a geologist ? Take the test !
What aspect of this picture did you feel MOST drawn towards?
A) The mountain range
B) The camera's angle of view
C) The bridge design
D)...
How to read a geologic map, parts 1, 2 and 3
Learn how to read geologic map...
Structural Geology, parts 1 and 2
Great 2 shorts lectures about structural geolog...
Folds, Dip and Strike
Describes how to determine dip and strike of folded rock layers and how to interpret geologic ma...
Extreme Soil Liquefaction
(2 Video...
The role of Geotechnical Engineers in saving monuments and historic sites
An other great and short article : CLICK HERE
...
A great and short article about stregthening and underpinning (reprise en sous oeuvre)
Strengthening and underpinning the foundations of the main building
of the Ministry of Foreign Affairs of Finland
Renforcement et reprise des efforts en sous-oeuvre des fondations de l`édifice du Ministère des Affaires Étrangères de Finlande...
This is why...
This is you should really start to think about geotechnical investigations
...
Weathering of granitic rocks
Spheroidal, onion skins weathering and granular desintegration ("grusification").
Silicate rocks are not completely soluble in water, they are subject to differential weathering...
Spheroidal weathering :
Let's take a look of this kind...
Resistant vs easily weathered beds
I have take some pictures and make a cartoon that show the resistant vs easily weathered beds:
...
Soil forming processes
Today we will talk about a bit of rock weathering and soil forming processes.
We can start by saying that weathering processes are most severe, active in tropical climes but almost hidden by the cover of vegetation as you can see in the picture...
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