The shear strength of a soil (a) is directly proportional to the angle of internal friction of the soil (b) is inversely proportional to the angle of internal friction of the soil (c) decreases with increase in normal stress (d) decreases with decrease in normal stress
Answers
The strength of a soil
(D) decreases with decreases in general stress
When constructing any building, dam, canal, levy, etc, soil's shear strength is very important in soil mechanics. And also know the strength of peaks or peaks with peak or steep areas. And the emphasis is on studying the strength of clay shear strength.
What is Shear?
When subject to loading (ext or int.), The shear is nothing but nothing but relative displacement f soil particles. Therefore, loading causes the motion of the soil particles.
What is shear power?
Shear strength is maximum resistance or stress that a special soil can offer against failure on its improper surface loading.
The main components of shear strength are:
• Structural resistance proposed by the interaction of particles
• Friction resistance provided by the particles due to their size and surface
• Solidarity and adhesion
Then came the Mohar-Kalomb theory (1776) to explain the shear strength of Egypt ....
The theory has been predicted for the first time by Coulomb and it states that there is a proper relation between shear and failure on general stress and hence the relationship is linear and give expression
According to shear stress is the task of general stress.
And coulomb sys that relationship is linear and Ie added a connection.
And came forward stamp and proposed that shear stress relies on common tension with union, friction, and type of soil.
Therefore, they gave the concept of stamp failure envelope based on observation and testing on soil samples.
Two images in the figure above Shows ... .. The first one is for the soil where the connective forces are the main forces which cause the strength of clay shear and the friction is in the soil of the plastic is zero.
The second is like a sand-like granular soil where the unity is united and shear strength is due to friction only.
Various tests have been done for sand, dirt ... ..etc. To check their shear strength.
In the case of soil, where Poir's pressure also works ......... effective parameters are in use ie. Effective stress, effective solidarity, effective friction angle.
The correct answer will be, “The shear strength of a soil decreases with a decrease in normal stress.”
However, you can easily identify the shear strength of the soil with the help of ultimate shear stress.
It is usually in respect to the influence of the strain that is put up with the shearing.