Q.15 The minimum velocity required to transport coarse sand through a sewer of 40 cm diameter with sand particles of 1 mm diameter and specific gravity 2.7, will be _m/s. [The friction factor for the sewer material may be assumed as 0.04 and roughness coefficient, k = 0.045 for inorganic solids]

Q.15 The minimum velocity required to transport coarse sand through a sewer of 40 cm diameter with sand particles of 1 mm diameter and specific gravity 2.7, will be _m/s. [The friction factor for the sewer material may be assumed as 0.04 and roughness coefficient, k = 0.045 for inorganic solids]

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter11: Ground Improvement

Section: Chapter Questions

Problem 11.7P

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Concept explainers

Calculation of Settlement

The vertical displacement of the structural foundation due to the loading from the superstructure is known as settlement. It is due to the reduction of air voids present in the soil. The amount of vertical displacement depends on the bearing capacity of the soil on which the foundation is laid. The effect of the settlement depends on the magnitude of settlement, uniformity, and the structural design of the structure. The maximum allowable settlement for residential and office buildings should be less than 18 mm, for industrial buildings, it is 38 mm and for commercial buildings, it is 25 mm.

Question

Q.15
The minimum velocity required to transport coarse
sand through a sewer of 40 cm diameter with sand
particles of 1 mm diameter and specific gravity 2.7,
will be
_m/s.
[The friction factor for the sewer material may be
assumed as 0.04 and roughness coefficient, k = 0.045
for inorganic solids]

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