• Thickness of sand layer = 6 m (i.e. X = 6 m) • Thickness of gravel layer = 5 m (i.e. Y = 5 m) • Depth of Point A from the bottom of gravel layer = 1.7 m (i.e. Z = 1.7m) • Depth of water table from the ground surface = 4 m (i.e. W = 4 m) Sand: y = 15.3 kN/m³ Yat = 17.5 kN/m³ Gravel: Vary = 15.3 kN/m³ Void ratio, e = 0.6 Specific gravity, G₂=2.45 Point A W

• Thickness of sand layer = 6 m (i.e. X = 6 m) • Thickness of gravel layer = 5 m (i.e. Y = 5 m) • Depth of Point A from the bottom of gravel layer = 1.7 m (i.e. Z = 1.7m) • Depth of water table from the ground surface = 4 m (i.e. W = 4 m) Sand: y = 15.3 kN/m³ Yat = 17.5 kN/m³ Gravel: Vary = 15.3 kN/m³ Void ratio, e = 0.6 Specific gravity, G₂=2.45 Point A W

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

Calculate the effective vertical stress at point A in the soil profile shown below (g=10m/s²)

a. 105.9kPA

b. 93.7kPA

c. 106.1kPA

a. 159.1kPA

• Thickness of sand layer = 6 m (i.e. X = 6 m)
• Thickness of gravel layer = 5 m (i.e. Y = 5 m)
• Depth of Point A from the bottom of gravel layer = 1.7 m (i.e. Z =
1.7m)
• Depth of water table from the ground surface = 4 m (i.e. W = 4 m)
Sand: y = 15.3 kN/m²
Ysat = 17.5 kN/m³
Gravel: Vary 15.3 kN/m³
Void ratio, e = 0.6
Specific gravity, G₁ = 2.45
Point A
W

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