The truck that will cause more pavement damage.
Answer to Problem 1P
The truck A will cause more pavement damage.
Explanation of Solution
The truck A will cause more pavement damage.
Given:
The truck A has two singles axles.
Weight of one axle of truck A is
Weight of other axle of truck A is
Weight of single axle of truck B is
Weight of the tandem axle of truck B is
The thickness of hot mix asphalt is
The thickness of soil-cement base is
The thickness of crushed stone sub base is
The drainage coefficients are
Formula Used:
Write the expression for the structural number.
Here,
Write the expression for equivalent singleaxle load for truck A.
Here,
Write the expression for equivalent single axle load for truck B.
Here,
Calculation:
Refer Table
For the hot-mix asphaltic concrete,
For the soil cement base,
For the crushed stone,
Substitute
Consider truck A.
Refer Table
The axle load equivalency factor corresponding to pavement structural number
The axle load equivalency factor corresponding to pavement structural number
Calculate the axle load equivalency factor corresponding to pavement structural number
The axle load equivalency factor corresponding to pavement structural number
The axle load equivalency factor corresponding to pavement structural number
The axle load equivalency factor corresponding to pavement structural number
The axle load equivalency factor corresponding to pavement structural number
The axle load equivalency factor corresponding to pavement structural number
The axle load equivalency factor corresponding to pavement structural number
Calculate the axle load equivalency factor corresponding to pavement structural number
Substitute
Consider truck B.
Refer Table
The axle load equivalency factor corresponding to pavement structural number
The axle load equivalency factor corresponding to pavement structural number
Calculate the axle load equivalency factor corresponding to pavement structural number
Refer Table
The axle load equivalency factor corresponding to pavement structural number
The axle load equivalency factor corresponding to pavement structural number
The axle load equivalency factor corresponding to pavement structural number
The axle load equivalency factor corresponding to pavement structural number
The axle load equivalency factor corresponding to pavement structural number
The axle load equivalency factor corresponding to pavement structural number
Calculate the axle load equivalency factor corresponding to pavement structural number
Substitute
Since,
Conclusion:
Thus, the truck A will cause more damage.
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Chapter 4 Solutions
PRIN.OF HIGHWAY ENGINEERING&TRAFFIC ANA.
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