Bearing Strength of Soil

Bearing Strength of Soil

So far, under soil strength section, we have explained total and effective stresses, pore pressure, angle of internal friction, shear strength, lateral earth pressure coefficient, and cohesion of clay. Now we are ready to start seeing how these are actually used, when designing foundations.   In this subsection we will now learn about bearing strength, […]

Angle of repose

Angle of repose

We talked about angle of internal friction of soil, in previous posts of this series. There is also the angle of repose, which is often confused with angle of internal friction. Angle of repose is the angle a soil forms with the horizontal, when poured over a surface in it’s loosest state. Although angle of […]

Angle of Internal Friction

Angle of Internal Friction

Think of this post as a direct continuation of the previous two posts of this series, shear strength of soil and lateral earth pressure. Now let’s present another very important characteristic of soil, the angle of internal friction, which we briefly mentioned already before in those sections. Let’s consider a block resting on a surface, […]

Lateral Earth Pressure

Lateral Earth Pressure

In designing retaining structures, the most critical thing to know is how much horizontal (lateral) pressure the retained soil will exert on the retaining structure, such as a retaining wall. In previous post, we learned how to calculate the vertical stresses soils. Here, we must somehow derive horizontal pressure from it. To do this, we […]

Shear Strength of Soil

We introduced shear stress before in this book. If you are not an engineer, and forgot what shear stress means, first please go back to section Structural Basics > Forces and look at again, what it means “shear”. Now, Imagine the following different situations: Think of water running down a sloped street. It can flow, […]