What is the purpose of soil mechanics?
The soil mechanics is a discipline that is part of the techniques of civil engineering which aims to object the study of materials made up of solid, liquid and gaseous particles which form loose soil, and this as a preamble to the calculation of foundations.
It makes it possible to understand the natural risks likely to impact the project and to assess their hazards in the area where the construction will take place. A study Geotech allows, among other things, to determine and optimize the principles of foundations that will be used to support future construction.
Whose volume, under pressure, does not decrease.
These soils are characterized and classified by means of several physical parameters, granulometry, plasticity, porosity, humidity, consistency, etc., which make it possible to designate them, describe them and predict their workability in earthworks.
The soils are loose geomaterials, gravel, sand and clay possibly mixed in variable quantities, whose cohesion is weak; it decreases until it disappears (liquefaction) by increasing the water content.
For a considered soil depth, these variations are essentially a function (see figure 2): movements of the water table: the soil is saturated below the water table and therefore cannot be the site of phenomena suction.
Contrary to the ‘intrinsic’ cohesion encountered in clay soils and linked to the nature of the soil, the ‘apparent’ cohesion is linked to the state (of stress or water) of the soil and can therefore vary over time.