Answered: ice. h2 0.8 m and h3 - 2.4 m. Compute…

ice. h2 0.8 m and h3 - 2.4 m. Compute the settlement of the clay layer in millimeter caused by primary consolidation if the preconsolidation pressure of the clay is 98 KPa.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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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 square column foundation with base of 1.38 m is shown in the
figure. It carries an axial load of 479 kN and has its bottom resting
on the ground water table located h1 - 1.5 m. below the ground
surface. h2=0.8 m and h3 - 2.4 m. Compute the settlement of
the clay layer in millimeter caused by primary consolidation if the
preconsolidation pressure of the clay is 98 kPa.
|P
Dry Sand
Wet Sand
Clay
h3
Soil Properties;
A
Unit Weight of Dry Sand= 15.6 KN/m3
Saturated Unit Weight of Sand - 19.6 KN/m3
Saturated Unit Weight of Clay = 18.7 KN/m3
Compression Index = 0.255
Void Ratio of Clay = 0.69
Swell Index 1/5Cc
X
✓ I tak 2
h1
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