IMPORTANT TOPICS FOR FOUNDATION ENGINEERING 1.Soil Investigation: Object of soil investigation for new and existing structures. Depth of exploration for different structures(2marks). Spacing of bore Holes(2marks) Methods of soil exploration Types of soil sample. Design features of sampler affecting sample disturbance(5marks). Essential features and application of the samplers Geophysical methods of exploration (5 & 10 Marks )(EASY TOPIC) 2.Earth Pressure: Terms and symbols used for a retaining wall(2 marks). Rankine’s theory both for active and passive earth pressure for Cohesionless(10marks) backfill with surcharge and fully submerged case. Cohesive backfill condition. Coulombs method for cohesion less backfill. 5marks Culmann’s graphical construction (without surcharge load).(10 marks ) (EASY TOPIC) 3.Shallow Foundation: Type of shallow foundations(2marks), Depth and factors affecting it.Definition of ultimate bearing capacity, safe bearing capacity and allowable bearing capacity(2marks). Rankine’s analysis and Terzaghi’s analysis.Types of failures. Factors affecting bearing capacity. Skemptons equation.. Plate Load test and standard penetrationTest. Bosussinesq equation for a point load, uniformly loaded circular and rectangular area(2marks), pressure distribution diagrams. Newmarks chart (2marks)and its construction. 2:1 method of load distribution. Comparison of Bosussinesq and Westerguard analysis for a point load. Causes of settlement of f rafts, Proportioning of rafts,Methods of designing raft, Floating foundation(2marks).3. 4.Pile Foundations: Nlassification of piles, different types based on composition. Types of pile driving hammers & their comparison. . Use of Engineering News Formula and Hileys (2marks)Formula for determination of allowable load. Limitations of pile driving formulae. Cyclic Pile Load Test, Separation of skin friction(2marks) and p Determination of point resistance and frictional resistance of a single pile by Static formulas. Piles in Clay, Safe load on a Friction and point Bearing pile. Pile in sand, Spacing of piles in a group, , Efficiency of pile group by converse - Labare formula and feeds formulas(2marks). Bearing capacity of a pile group in clay by block failure and individual action approach. Numerical problems. Settlement of pile groups in sand, Negative skin friction.Related numerical problem 5.Caissons and Wells: Major areas of use of caissons(2marks), advantages and disadvantages of open box and pneumatic caissons. Essential part of a pneumatic caisson. Components of a well(2marks) foundation.Calculation of allowable bearing pressure. Conditions for stability of a well, Forces acting on a well foundation. Computation of scour depth.(EASY TOPIC)
Posted on: Wed, 07 May 2014 18:09:34 +0000
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