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07-Str-A3: May 2013

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 True/False with Justification
  2. Question 2 Effective Stress under Undrained and Drained Loading
  3. Question 3 Grain-Size Distribution, Gradation and Permeability
  4. Question 4 Vertical Stress Increase by Superposition
  5. Question 5 Flow Net, Seepage and Stability of a Cutoff Wall
  6. Question 6 Stress Profile with Capillary Rise and Consolidation Settlement

Start with Question 1 →

EGBC / Engineers Canada National Examination — Structural Engineering (legacy), 07-Str-A3 Geotechnical Materials and Analysis, May 2013. Three hours; closed book; one Casio or Sharp approved calculator; drawing instruments required; all charts and equations are supplied at the back of the paper. Total value 100 marks over six compulsory questions (20 + 10 + 10 + 20 + 20 + 20). Every question and every sub-part is solved in full below.

Reference texts: Das, Principles of Geotechnical Engineering, 9th ed. (Ch. 2 grain-size distribution and classification, Ch. 6 compaction, Ch. 7 permeability, Ch. 8 seepage and flow nets, Ch. 9 in-situ stresses and capillary rise, Ch. 10 stresses in a soil mass, Ch. 11 consolidation, Ch. 12 shear strength); Knappett & Craig, Craig’s Soil Mechanics, 8th ed. (flow nets, effective stress, heave and piping); Holtz, Kovacs & Sheahan, An Introduction to Geotechnical Engineering, 2nd ed.; Canadian Geotechnical Society, Canadian Foundation Engineering Manual (CFEM), 4th ed. — the governing Canadian practice document for settlement, excavation dewatering and factors of safety; ASTM D2487 (USCS classification) and ASTM D6913 (grain-size analysis).