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Calculation of Standard Axle Loads Starter Quiz

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Question 1

Following observations were made in an axle load survey on a flexible road stretch. Vehicle damage factor is_______.

Question 2

A flexible pavement has the following class of loads during a particular hour of the day.

i. 80 buses with 2-axles (each axle load of 40 kN);

ii. 160 trucks with 2-axles (front and rear axle loads of 40 kN and 80 kN, respectively)

The equivalent standard axle load repetitions for this vehicle combination as per IRC:37-2012 would be

Question 3

Which of the following factors affect the cumulative standard axle value in the design of pavements?

i. Vehicle damage factor

ii. Lane distribution factor

iii. Load safety factor

iv. Rate of growth

Question 4

A pavement failed after 10 thousand repetitions of an axle load of 8000 kg. What will be the axle load in kg due to which the same pavement will fail within 6 thousand repetitions?

Question 5

For an axle load of 15 tonne on a road, the Vehicle Damage Factor (round off to two decimal places), in in terms of the standard axle load of 8 tonne, is ______.

Question 6

Design traffic in million standard axle required for design of flexible pavement as per IRC method using following data is 27 MSA

i. Annual daily commercial vehicle at last count (MAY 2015) = P CVD

ii. Rate of traffic growth= 5%

iii. Design life = 17 years

iv. Vehicle damage factor = 1.7

v. Load safety factor =1

vi. The road is proposed to be completed in MAY 2021

Assume it will be two lane road with traffic in both directions. Value of P is

Question 7

Determine the CSA value for the flexible pavement for a two lane undivided carriageway having 5000 vehicles per day having average rear axle load of 3 tonne. The design life of the pavement is 20 years and the annual growth rate is 6%.
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Sep 22ESE & GATE CE