What is Research methodology for flexible pavement design?

PROJECT METHODOLOGY

 Introduction:

This chapter contains detailed information about working done on the progression of project. The main concern of the project was analysis of road under different conditions. The analysis ofroads under different factors is the branch of highway engineering concerned with the fatigue life and rut depth of pavement. The basic objectives in pavement analysis are to optimize efficiency and safety while minimizing cost and environmental damage. Project scope was organized in following steps:

•           Importing collected data to Mitchpave.

•           Making changes for the purpose of analysis.

•           Performing analysis..

•           Plotting the data on sheets.

 

Selection of Project:

 

The project which was selected for analysis of pavement using mitchpavewas taken from Lahore named Lahore Ring Road. The physical attributes of project are as follows:

•           pavement area is assumed to expand considerably in the straight directions,

The last layer is understood to be infinitely deep

•           Length of road is 85 km.

•           All the pavement layers are thought to be fully bonded so that no slip occurs due to applied load.

 

Working on Mitch Pave:

 

First phase of project working is to stepwise import the data to the Mitch pave and make the required changes to perform analysis.

  Changing Existing File.

          First step in the mitchpave is to Change the existing file name because when we change data it should be saved with another name.

 

Changing Existing File

: Modifying initial Data.

Variables Used in Mitch pave:

The factors which we changed to perform analysis are as following.

1.         Temperature

2.         Kinematic Viscosity\

3.         Void Ratio

4.         AC  Modulus

5.         WBM Modulus

6.         Sub Grade Modulus

7.         Sub Base Modulus

Temperature.

               change the temperature with a constant interval and check its effects on fatigue life and rut depth.

1.         First of all  open mitch pave

2.         Then go to option no 4 (modify an existing) file menu.

3.         After in this menu press 1 to change the initial settings where change file name and leave the rest as be then press f1 key to save.

4.         After pressing f1  are now in the new menu which is shown in the figure 3.2 and here  change the value of temperature. This is highlighted in figure.

5.         After that  press f1 again to save our changes and this takes us back to modify and existing file menu.

6.         Now we press 2 to modify material type.

7.         We do not change anything in this menu and press f1 to go back to modify an existing data file menu.

8.         Now we press 3 to go to the next menu which is named as modify material properties here we also do not change anything we just press f1 to go back to modify an existing file menu.

9.         Now we press 4 to go to next menu named as modify cross sections for computation we also do not change anything in this menu and just press f1 to go back to modify an existing file menu.

10.       There are no 5, 6 and 7 options too but our concern is with no 7 which is go back to main menu so we press no 7 and go back to main menu.

11.       In main menu now we press 5 to perform analysis

12.       A new menu opens showing results of every data we changed.

13.       Then we put this data on excel sheets to make a graphical representation of our results.

14.       One important thing to note is that we cannot see our results on mitchpave again after closing so we have to capture a screen shot.