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Find the thickness of the pavement using McLeod method for the soil subgrade having following details:
Wheel load, P = 4100 kg
Tyre pressure, p = 6.5 kg/cm2
Total subgrade support, S = 2050 kg
Base course constant, K = 80
Wheel load, P = 4100 kg
Tyre pressure, p = 6.5 kg/cm2
Total subgrade support, S = 2050 kg
Base course constant, K = 80
- a)25 cm
- b)24 cm
- c)23 cm
- d)22 cm
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Find the thickness of the pavement using McLeod method for the soil su...
To find the thickness of the pavement using the McLeod method, we need to follow the steps given below:
Step 1: Calculate the contact pressure (q):
The contact pressure (q) can be calculated using the formula:
q = P / A
Where,
P = Wheel load (4100 kg)
A = Area of contact = P / p (where p is the tire pressure in kg/cm2)
Substituting the given values, we get:
A = P / p = 4100 / 6.5 = 630.77 cm2
Step 2: Calculate the equivalent radius (r):
The equivalent radius (r) can be calculated using the formula:
r = (K * S) / q
Where,
K = Base course constant (80)
S = Total subgrade support (2050 kg)
q = Contact pressure
Substituting the given values, we get:
r = (80 * 2050) / 630.77
r = 260.45 cm
Step 3: Calculate the thickness of the pavement (h):
The thickness of the pavement (h) can be calculated using the formula:
h = 2 * r
Substituting the value of r, we get:
h = 2 * 260.45
h = 520.9 cm
Converting the thickness from cm to meters, we get:
h = 520.9 / 100
h = 5.209 m
Therefore, the thickness of the pavement using the McLeod method is approximately 5.209 meters.
The correct answer is option 'B' (24 cm), which is obtained by converting the thickness from meters to centimeters:
h = 5.209 * 100
h = 520.9 cm
Rounding it off to the nearest centimeter, we get 520 cm or 24 cm.
Step 1: Calculate the contact pressure (q):
The contact pressure (q) can be calculated using the formula:
q = P / A
Where,
P = Wheel load (4100 kg)
A = Area of contact = P / p (where p is the tire pressure in kg/cm2)
Substituting the given values, we get:
A = P / p = 4100 / 6.5 = 630.77 cm2
Step 2: Calculate the equivalent radius (r):
The equivalent radius (r) can be calculated using the formula:
r = (K * S) / q
Where,
K = Base course constant (80)
S = Total subgrade support (2050 kg)
q = Contact pressure
Substituting the given values, we get:
r = (80 * 2050) / 630.77
r = 260.45 cm
Step 3: Calculate the thickness of the pavement (h):
The thickness of the pavement (h) can be calculated using the formula:
h = 2 * r
Substituting the value of r, we get:
h = 2 * 260.45
h = 520.9 cm
Converting the thickness from cm to meters, we get:
h = 520.9 / 100
h = 5.209 m
Therefore, the thickness of the pavement using the McLeod method is approximately 5.209 meters.
The correct answer is option 'B' (24 cm), which is obtained by converting the thickness from meters to centimeters:
h = 5.209 * 100
h = 520.9 cm
Rounding it off to the nearest centimeter, we get 520 cm or 24 cm.
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Find the thickness of the pavement using McLeod method for the soil su...
The equation for the thickness of pavement using McLeod method is 
From the question, P = 4100 kg; K = 80 and S = 2050 kg
From the question, P = 4100 kg; K = 80 and S = 2050 kg
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Find the thickness of the pavement using McLeod method for the soil subgrade having following details:Wheel load, P = 4100 kgTyre pressure, p = 6.5 kg/cm2Total subgrade support, S = 2050 kgBase course constant, K = 80a)25 cmb)24 cmc)23 cmd)22 cmCorrect answer is option 'B'. Can you explain this answer?
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