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# THAPAR UNIVERSITY Flexible Pavements,PIN223 MARCH 2015 PAPER Notes | EduRev

## : THAPAR UNIVERSITY Flexible Pavements,PIN223 MARCH 2015 PAPER Notes | EduRev

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Roll No:
THAPAR UNIVERSITY, PATIALA
Department of Civil Engineering
PI N223 -Flexible Pavements
Mid Semester Examination (13/03/2015)
Faculty Incharge - Tanuj Chopra 	 Max. Marks: 30, Time: 2 hr
Note: - Attempt all questions. No Standard Charts and Codes are allowed. Assume any requisite data, if required.
Q: 1 Design the flexible overlay section on the existing high category paved pavement in
terms of the characteristic & overlay deflections with the following Initial (ID),
Intermediate (IMD) and Final (FD) deflection readings (in mm) for a section of 1 km length.
ID 5.51 7.31 7.20 6.64 7.02 13.86 6.42 4.69 8.29 10.51 6.65 3.85 12.59 1.63 14.46 7.53 7.68 7.48 7.51 7.58 8.55
IMD 5.12 7.20 6.78 6.49 6.86 13.44 6.15 4.35 '8.23 10.44 6.44 3.71 12.37 1.52 14.22 7.03 7.55 7.29 7.41 7.36 8.05
FD 5.10 7.19 6.74 6.48 6.83 13.44 6.02 4.33 8.23 10.44 6.43 3.70 12.37 1.52 14.21 7.00 7.52 7.26 7.39 7.34 8.01
UP DIRECTION
.4 	 DOWN DIRECTION
•
Input data: - Traffic for which overlay is to be designed = 50 msa., Field Moisture Content is
11% for clayey Subgrade with high plasticity (Pl>15) for low rainfall areas (< 1300mm).
Seasonal correction factor = 1.2, Pavement Temperature: 40°C. 	 (9)
Q: 2(a) Explain the Lane Distribution factor (LDF) and the Vehicle Damage Factor
(VDF) for the calculations of the standard axle repetitions in a design life of the flexible
pavement.
2(b) State the performance parameters considered for the design of the serviceability of
flexible pavements and also mark the critical locations (in terms of stress & strain) in the
flexible pavement section. 	 (3, 4)
Q: 3(a) Explain the objectives (with the help of the graphs) of Pavement Maintenance
Management System in maintaining and evaluating the existing transportation
infrastructure.
3(b) Explain briefly the various equipments that can be used for evaluating the flexible
pavement infrastructure of the country. 	 (4, 3)
Q: 4 The following aircrafts have to use the Flexible Runway Pavement. The input
parameters for the aircrafts are as given in the table. Calculate the design aircraft and the
equivalent annual departures of the design aircraft to be considered for the flexible runway
pavement design? 	 (7)
AIRCRAFT GEAR TYPE AVG. 	 ANNUAL
DEPARTURES
MAX. TAKE OFF
WEIGHT (lbs)
DESIGN
THICKNESS
727-100 Dual 2600 1,60,000 17 in.
727-200 Dual 3100 1,90,500 21 in.
707-320B Dual Tandem 8900 2,90,000 28 in.
747-100 	 (wide
body aircraft)
Double 	 dual
tendem
125 6,00,000 19 in.
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