Submerged unit weight
In fluid mechanics, specific weight ( or unit weight ) represents the force exerted by gravity on a unit volume of a fluid. Specific weight can be used as a characteristic property of a fluid. Specific weight is often used as a property of soil to solve earthwork problems. (Soil is the mixture of minerals, organic matter, gases, liquids, and the myriad of organisms that together support plant life).
In soil mechanics, specific weight may refer to: the “Submerged unit weight” , which is defined as the difference between the saturated unit weight and the unit weight of water.
Saturated unit weight is the unit weight of a soil when all void spaces of the soil are completely filled with water, with no air.
|γsub||Submerged unit weight of the material (N/m3)|
|γs||The saturated unit weight of the material (N/m3)|
|γw||The unit weight of water (N/m3)|