FLEXIBLE PAVEMENT DESIGN

Civil Engineering Department | DCC3113 : Highway & Traffic Engineering




Exercise




The preliminary thickness design of flexible pavement structure for highway project is shown in
the figure below. The 30 cm layer will be constructed on top of sub-grade in rainy season.
Owing to this situation, the contractor of this project has give the suggestion to mix the 30 cm
layer with the laterite soil and then stabilized by using cement. The stabilization will avoid a
damage that is caused by heavy rain as well as increasing a value of CBR soil from 8% to
60%. Thereby, the contractor has a given a suggestion in order that the thickness of the
pavement will be modified. Determine a new thickness design of flexible pavement structure
for this project based on the suggestion by assuming that the stabilization layer will be
functioned as sub-base layer.





























 HOME
Prepared by : SITI ZURAIFA BINTI MD SAH, [email protected]

Civil Engineering Department | DCC3113 : Highway & Traffic Engineering




Exercise





The estimated average daily traffic for a two-lane-two-way trunk road which will be built
across a flat terrain is 5500 vehicles for both ways. The traffic growth rate is 4.4%, percentage
of commercial vehicle is 12% and the value of California Bearing Ratio of the sub-grade soil is
5.2%. Design life 10 years.

Requirement of pavement layers:
Wearing Course = Asphalt Concrete.

Road-Base Course = Broken Aggregate.
Sub-Base Course = Broken Aggregate.


Assume road shoulder width 2.0m and carriageway width 7.5m.


Design the flexible pavement for two-way-two-lane road based on the JKR methodology.

















 HOME
Prepared by : SITI ZURAIFA BINTI MD SAH, [email protected]

Civil Engineering Department | DCC3113 : Highway & Traffic Engineering




Summary





COURSE LEARNING OUTCOMES (CLO)

Upon completion of this course, students will be able to:-
CLO 1 : Apply the fundamentals concepts and principles of highway and traffic engineering and related act in Malaysia. (C3)



CONTENT

5.2.1 Describe the design factors of
5.1 thickness of pavement
Know the a. Traffic load
basic design b. Design life
of flexible c. Sub-grade condition
pavement d. Drainage
UNIT 5: 5.2.2 Explain traffic loads and axle
FLEXIBLE
5.1.1 State the factors that are weight
considered in designing the PAVEMENT 5.2.3 Adopt the Public Work
thickness of flexible DESIGN Department flexible design
pavement. pavement method.
5.2
a. Failure criteria Understand
b. Traffic loading the design
c. Traffic decaying power of flexible
d. Environmental effect pavement





 HOME
Prepared by : SITI ZURAIFA BINTI MD SAH, [email protected]