A 30m x 30m piece of land was purchased for the construction of a three-story building. The total vertical load from the building will be 3kN/m for each floor. The weight of the building will be supported by the square columns and the loads will be transferred to the ground through 9 isolated square footing each 1.5 long and 1.5m wide. The arrangement of the column is as shown in plan view. GWT(m) 20

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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A 30m x 30m piece of land was purchased for the construction of a three-story building. The total
vertical load from the building will be 3kN/m for each floor. The weight of the building will be
supported by the square columns and the loads will be transferred to the ground through 9 isolated
square footing each 1.5 long and 1.5m wide. The arrangement of the column is as shown in plan
view.
GWT(m)
Dry Unit Weight (KN/m3)
Saturated Unit Weight (KN/m3)
20
20.1
22.512
Moisture Content above GWT (%)
Moisture Content below GWT (%)
12
Effective Friction Angle (deg)
39
At rest Earth Pressure Coefficient, Ko
0.8
Cohession
Transcribed Image Text:A 30m x 30m piece of land was purchased for the construction of a three-story building. The total vertical load from the building will be 3kN/m for each floor. The weight of the building will be supported by the square columns and the loads will be transferred to the ground through 9 isolated square footing each 1.5 long and 1.5m wide. The arrangement of the column is as shown in plan view. GWT(m) Dry Unit Weight (KN/m3) Saturated Unit Weight (KN/m3) 20 20.1 22.512 Moisture Content above GWT (%) Moisture Content below GWT (%) 12 Effective Friction Angle (deg) 39 At rest Earth Pressure Coefficient, Ko 0.8 Cohession
For each of the footing shown in the plan view, determine the depth of the foundation for
the factor of safety 4 for the following cases:
Case I: Ground water table is at a depth 40m below the ground surface
Case 2: Ground water Table at 1 m below the surface
30m
Each blue footing
takes 1/16 of
the building load
Each black
footing takes
1/8 of the
building load
Each black
footing takes
1/4 of the
building load
30m
Transcribed Image Text:For each of the footing shown in the plan view, determine the depth of the foundation for the factor of safety 4 for the following cases: Case I: Ground water table is at a depth 40m below the ground surface Case 2: Ground water Table at 1 m below the surface 30m Each blue footing takes 1/16 of the building load Each black footing takes 1/8 of the building load Each black footing takes 1/4 of the building load 30m
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