TGPSC HMWSSB Manager 2015 Paper 2 · Question 35

Question 35 of the TSPSC Manager (Engineering), HMWSSB, 2015: Paper 2 (Civil Engineering) (1 November 2015). Try it first, then open the answer and explanation.

1. Manager 2015 Paper 2 (Civil) · Q35 · Geotechnical Engineering · Soil Mechanics

   The magnitude of total primary consolidation settlement of a 6m thick clay with single drainage was estimated as 96 mm. Later it was found that, the medium has double drainage. Then, the magnitude of total primary consolidation settlement will be:

   1. 48 mm
   2. 192 mm
   3. 384 mm
   4. 96 mm
   Show answer

   Answer: (4) 96 mm

   Final consolidation settlement (m_v Δσ H) depends on the compressibility, stress increase and layer thickness, not on the drainage conditions. Double drainage only shortens the drainage path, so the settlement happens about four times faster but stays 96 mm.

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