H.W1: For the raft foundation with dimensions of 20 m show immediate and consolidation settlement of the clay layer. V = 80 MN W.T 2 m Raft (20 mx20 m) eo=0.9 eF0.8 E=10 MPa 4 m Clay v=0.45 Ysat.= 20 kN/m

H.W1: For the raft foundation with dimensions of 20 m show immediate and consolidation settlement of the clay layer. V = 80 MN W.T 2 m Raft (20 mx20 m) eo=0.9 eF0.8 E=10 MPa 4 m Clay v=0.45 Ysat.= 20 kN/m

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter9: Consolidation

Section: Chapter Questions

Problem 9.18P

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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

H.W1: For the raft foundation with dimensions of 20 mx20 m shown in the figure, determine the
immediate and consolidation settlement of the clay layer.
V = 80 MN
W.T
2 m
Raft (20 mx20 m)
eo=0.9
eF0.8
E=10 MPa
4 m
Clay
v=0.45
Ysat.= 20 kN/m³
Sand
Hint: Ae = e, - ef

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