Laserfiche WebLink
<br /> <br />• <br />Example of Cylindrical Failure <br />The two most important strength characteristics of the slope materials aze: 1) the internal angle <br />of friction (~) in degrees and 2) existing cohesion of the material in place (c~ in tons per sq. ft. <br />Pore pressure ratios, material density, phreatic surfaces and shrink/swell potential aze other <br />factors which can also be important. <br />In lay terms, cohesion is a measure of resistance to shearing forces due to bonding between <br />particles in afine-grained soil. The internal angle of friction is a measure of resistance to <br />shearing forces due to friction among lazge soil particles. Clays generally have a very high <br />cohesion and very little internal friction. Sands, gravels and poorly sorted and uncrushed rock <br />usually have high internal friction angles and little or no cohesion. <br />2 <br />