Answered: within sand where N60 is 20. Using Eq.…

within sand where N60 is 20. Using Eq. (10.14), estimate the elastic settlement when the net applied pressure is 250 kN/m².

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter9: Settlement Of Shallow Foundations

Section: Chapter Questions

Problem 9.6P

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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

A 12 m × 9 m mat foundation is placed at a depth of 3 m
within sand where N60 is 20. Using Eq. (10.14), estimate the
elastic settlement when the net applied pressure is 250 kN/m².

Se
Ina (kN/m³) =
0.08
25
D
1 + 0.33
B
[S,(mm)"
(10.14)
0.08|
25
< 0.67Ng[S,(mm)]

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