ExerciseA certain site is underlain by clay. A proposed building for this site having a500 kN column load (including the weight of foundation) is designed to besupported on a surface square footing. A field plate loading test wasperformed using a square plate of size 30 cm, Figure 1 displays the pressure-settlement curve, from which the ultimate capacity of the plate was 180 kN/m2.Answer the following questions:According to the plate loading test result, considering a factor of safety of 2against vertical bearing capacity and the allowable settlement of 2.5 cm fordesign requirements, determine the minimum footing size to meet therequirements and the condition which governs the design (bearing capacity orsettlement). Pressure (kN/m2)200180180180160140120120100100806040200.1015202530Settlement (mm)Figure 1. Load-settlement curve of the plate loading test2.

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Asked Dec 27, 2019
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Exercise
A certain site is underlain by clay. A proposed building for this site having a
500 kN column load (including the weight of foundation) is designed to be
supported on a surface square footing. A field plate loading test was
performed using a square plate of size 30 cm, Figure 1 displays the pressure-
settlement curve, from which the ultimate capacity of the plate was 180 kN/m2.
Answer the following questions:
According to the plate loading test result, considering a factor of safety of 2
against vertical bearing capacity and the allowable settlement of 2.5 cm for
design requirements, determine the minimum footing size to meet the
requirements and the condition which governs the design (bearing capacity or
settlement).
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Exercise A certain site is underlain by clay. A proposed building for this site having a 500 kN column load (including the weight of foundation) is designed to be supported on a surface square footing. A field plate loading test was performed using a square plate of size 30 cm, Figure 1 displays the pressure- settlement curve, from which the ultimate capacity of the plate was 180 kN/m2. Answer the following questions: According to the plate loading test result, considering a factor of safety of 2 against vertical bearing capacity and the allowable settlement of 2.5 cm for design requirements, determine the minimum footing size to meet the requirements and the condition which governs the design (bearing capacity or settlement).

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Pressure (kN/m2)
200
180
180
180
160
140
120
120
100
100
80
60
40
20
0.
10
15
20
25
30
Settlement (mm)
Figure 1. Load-settlement curve of the plate loading test
2.
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Pressure (kN/m2) 200 180 180 180 160 140 120 120 100 100 80 60 40 20 0. 10 15 20 25 30 Settlement (mm) Figure 1. Load-settlement curve of the plate loading test 2.

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Expert Answer

Step 1

Given data:

The column load on the building (P) is 500 kN.

The footing is a square footing.

The size of square plate (Bp) is 30 cm.

The ultimate capacity of the plate (qup) is 180 kN/m^2.

The factor of safety for plate loading test (FOS) is 2.

The allowable settlement (qa) is 2.5 cm.

Step 2

The ultimate capacity of the footing for clay is given by,

Civil Engineering homework question answer, step 2, image 1
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Step 3

Plugging val...

Civil Engineering homework question answer, step 3, image 1
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