9.6 A mat foundation is shown in Figure P9.6. The design considerations are L = 12 m, B = 10 m, Dy = 2.2 m, Q = 30 MN, x₁ = 2 m, x₂ = 2 m, x3 = 5.2 m, and preco solidation pressure o 105 kN/m². Calculate the conso dation settlement under the center of the mat. Size of mat =Bx L Sand

9.6 A mat foundation is shown in Figure P9.6. The design considerations are L = 12 m, B = 10 m, Dy = 2.2 m, Q = 30 MN, x₁ = 2 m, x₂ = 2 m, x3 = 5.2 m, and preco solidation pressure o 105 kN/m². Calculate the conso dation settlement under the center of the mat. Size of mat =Bx L Sand

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter8: Mat Foundations

Section: Chapter Questions

Problem 8.7P

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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

9.6
A mat foundation is shown in Figure P9.6. The design
considerations are L= 12 m, B = 10 m, Dy= 2.2 m,
Q = 30 MN, x₁ = 2 m, x₂ = 2 m, x3 = 5.2 m, and precon
solidation pressure o≈ 105 kN/m². Calculate the conso
dation settlement under the center of the mat.
D₁
X3
Figure P9.6
Size of mat = B x L
Vo
Clay
Ysat = 17.5 kN/m³
€= 0.88
C=0.38
C₁=0.1
Sand
y = 16.0 kN/m³
Water
table
Sand
Ysat = 18.0 kN/m³

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