EFFECT FROM THE ACADEMIC YEAR 2013 - 2014

CE 403

FOUNDATION ENGINEERING

Instruction                                                                                                                                                                                         4Periods per week

Duration of University Examination                                                                                                                                                     3 Hours

University Examination                                                                                                                                                                       75 Marks

UNIT-I

Stress distribution in Soils: Boussinesq’sand Westergaurd’s equations for point loads. Application of point load formulae for uniformly distributed load on circular and rectangular areas. Use of Newmark’s chart (for Boussinesq’s equation).Contact pressure distribution.

UNIT-II

Bearing capacity of soils: Terzaghi’s equation for bearing capacity in soils – its modification for continuous, square, rectangular and circular footings, general and local shear failure conditions. Plate load test as per IS specifications. Allowable bearing capacity.Standard penetration test and use of N values for estimating soil conditions and bearing capacity.Proportioning of footings.

Settlement Analysis: Computation of pressures before loading and after loading. Estimation of settlement – ultimate and after any given period.Correction for construction period.

UNIT-III

Pile Foundations: Types of piles – timber, steel, concrete, cast-in-situ, precast piles, bearing piles, friction piles, compaction piles, large diameter piles. Pile capacity – static formulae, dynamic formulae, pile load test, determination of point resistance and skin friction as per IS code. Bearing capacity of pile groups, negative skin friction.

UNIT-IV

Coffer Dams: Earth embankments, Cantilever sheet files, braced coffer dams, double wall coffer dams, cellular dams – circular, diaphragm type, general description and construction methods.

Cassions: Types of cassions – open, pneumatic and box cassions (floating cassions). General description and construction methods – Types and uses.

Different shapes of wells, Design of individual components of the well, sinking of wells, Measures for rectification of tilts and shifts.

UNIT-V

Dewatering Techniques: Sumps, ditches, well points, deep wells.

Timbering of Excavation: Bracings for shallow and deep excavations. Computation of lateral earth pressure.Reaction of struts.

Site Investigation: Principles of Exploration, sampling methods, transportation and storage of samples, boring and drilling methods, log of bore holes, sampling tubes and samplers. Sampling records.

Suggested Reading:

 1.PrakashShamsher, Ranjan T. Saran S., Analysis and Design of Foundations and Retaining Structure, SaritaPrakashan, Merrut, 1979.

 2.Bowles Joseph E., Foundation Analysis and Design, McGraw Hill Publishers, 2000.

 3.Swami Saran, Analysis and Design of Sub Structures, Oxford 7 IBH, 1998.

 4.Dr. K. R. Arora, Soil Mechanics and Foundation Engg.,Standard Publishers, 2002.