A bed of uniform sand having particle size 0.66 mm diameter and specific gravity of 2.65, porosity 0.40 and depth 60 cm is to be washed hydraulically. Considering laminar flow and Stoke's law valid what is the value of backwash velocity? (Expansion of bed is 50%, y = 1.31 × 10-2 cm²/sec)

A bed of uniform sand having particle size 0.66 mm diameter and specific gravity of 2.65, porosity 0.40 and depth 60 cm is to be washed hydraulically. Considering laminar flow and Stoke's law valid what is the value of backwash velocity? (Expansion of bed is 50%, y = 1.31 × 10-2 cm²/sec)

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter2: Geotechnical Properties Of Soil

Section: Chapter Questions

Problem 2.11P

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Concept explainers

Consolidation parameters

Consolidation is the process of expulsion of pore water present in the voids of soil solids under the pressure of the applied load. This is a quick process in the case of coarse-grained soils since the permeability is high due to the presence of more voids, while it is a slow and gradual process in the case of clayey soil as the permeability of clay is less. An example of consolidation is the settlement of soil under a building due to the load coming from the building.

Question

A bed of uniform sand having particle size 0.66 mm diameter and specific gravity of
2.65, porosity 0.40 and depth 60 cm is to be washed hydraulically. Considering
laminar flow and Stoke's law valid what is the value of backwash velocity?
(Expansion of bed is 50%, y = 1.31 x 10-2 cm2/sec)

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