LECTURER: M. MASIYANDIMA

OFFICE: DG18

COURSE OBJECTIVES:   To acquaint students with the principles of soil    mechanics, foundations and cultivations.

 ASSESSMENT:

l.  Soil Shear and Coulomb Equation
Methods of Measuring Soil Strength
MOHR Circle

2.     MOHR Coulomb Failure criteria.

3.     Active and passive renkine states Coulomb theory of active   earth pressure.

4.    Logarithmic spiral techniques for calculating passive earth   pressures.

5.    General soil mechanics equation.

6.     Dynamic properties of soil: Cohesion adhesion friction strength in compression vertical harrow thies.  Soil failure pattern with wedge information.  Dimensions of wedge pay theory of failure prediction of forces using Hilliaratchi theory of failure structured narrow times. Effect of rake angles on soil failure patterns draught and penetrations.
O'Callaghan and Hettiaratchi theories of failure. Force  predictions.

7+8.   Factors influencing draught, scouring and power requirements. Soil/soil, soil.metal sliding resistance implement shape and speed. Methods of reducing draught: Electro end osmosis materials, vibrations, heat mechanical means.  Theory of scouring. Vibrations as a means of reducing soil/soil and soil metal sliding resistance.

9+10.  Soil loosening. Compaction moling, particle and aggregate   arrangement.

11+12. Inversion: requirements, mode of soil failure with a mouldboard plough, Soehn's approach to high speed plough design, ploughing methods.

Continuous Assessment  30%
Examination             70%

REFERENCES/TEXT BOOKS

 1. Soil Cutting and Tillage (1989)
        By E. McKyes

 2. Elements of Soil Mechanics (1983)
        G.N. Smith

 3. Soil Mechanics (1981)
            M.J. Smith

 4. Soil Mechanics and Foundations (1980)
        G.R. Scott