= 7.1 A foundation for a long concrete block wall of thickness 0.2 m (8 in.) will be founded on a dense sand ( from direct shear test = 32°; D,= 85% and Ysat 17.8 kN/m³ (113 pcf)). The wall will transmit a vertical live load load of 60 kN/m (4000 lb/ft) in addition to the estimated foundation dead load of 7.5 kN/m (500 lb/ft). The foundation is to be located 0.5 m (1.5 ft) below finished grade. The groundwater level is 5 m (16 ft) below finished grade. Determine the size of the foundation (width) using ASD for FS 3. Investigate the effects of a rise of the groundwater to (a) the ground surface and (b) the foundation base.

= 7.1 A foundation for a long concrete block wall of thickness 0.2 m (8 in.) will be founded on a dense sand ( from direct shear test = 32°; D,= 85% and Ysat 17.8 kN/m³ (113 pcf)). The wall will transmit a vertical live load load of 60 kN/m (4000 lb/ft) in addition to the estimated foundation dead load of 7.5 kN/m (500 lb/ft). The foundation is to be located 0.5 m (1.5 ft) below finished grade. The groundwater level is 5 m (16 ft) below finished grade. Determine the size of the foundation (width) using ASD for FS 3. Investigate the effects of a rise of the groundwater to (a) the ground surface and (b) the foundation base.

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

=
7.1 A foundation for a long concrete block wall of thickness
0.2 m (8 in.) will be founded on a dense sand ( from direct
shear test = 32°; D, 85% and Ysat
17.8 kN/m³3 (113 pcf)).
The wall will transmit a vertical live load load of 60 kN/m
(4000 lb/ft) in addition to the estimated foundation dead load of
7.5 kN/m (500 lb/ft). The foundation is to be located 0.5 m
(1.5 ft) below finished grade. The groundwater level is
5 m (16 ft) below finished grade. Determine the size of
the foundation (width) using ASD for FS-3.) Investigate
the effects of a rise of the groundwater to (a) the ground
surface and (b) the foundation base.
-

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