Civil Engineering Project Topic on Highway building is explained here. Detailed analysis with calculation about this project is provided in project report.
where (A) is the algebraic difference between the two grades.
We can use L > Lmin if we need to keep smoothness, safety and efficiency of the highway.
To perform the vertical curve, we subtract (L/2) from the vertical point of intersection (VPI), to determine the beginning point of the vertical curve(BVC), and we add (L/2) to (VPI), to determine the end point of the vertical curve(EVC), then we can connected the two point by a parabolic curve.
Cut and fill areas:-
In highway engineering we must balance between the volumes of cut and fill, as well as the transportation needs of the excavated materials, this means that in the same project, the fill sits should be adjacent to cut sites, so we must use a good mass haul diagram.
There are some conditions that should kept in mind when we design the grades:-
1. Balance the amounts of cut and fill.
2. Keep a minimum distances between the consecutive maximum and minimum points, this means that the surplus of excavated masteries will be transported for short distance to be used as fill in the adjacent sites.
3. It is preferred to start the project with cut.
4. The highest amount of cut or fill must not increase then (12-15m) for large distance.
In this project; we have four sites of cut and four sites of fill, we balanced between them as possible, and we design them to be a consecutive sites.
The cross section is very important, since it gives a good description of the terrain on the sides the highway.
In this project we just took three cross sections :-
1. Cross section in cut site.
2. Cross section in fill site.
3. Cross section in both cut and fill site.
To perform the cross section, we take a perpendicular line at the center line of the highway, its length equal to the width of the highway (24.4m), then we determine the elevation across the width of the highway.
Form the profile we can determine the elevation of the highway on that station, and the ground elevation then we plot a cross section of scale (1:100) for the highway and the existence terrain.
- the pavement layer is consist asphalt 6 cm and base coarse ( 40 cm ) - the cross slope is 2%
Right of way:-
In is the total area that consists the construction of the highway, its width should be enough to accommodate all the elements of the highway cross section. And it is 30 m in our project.
In general; the right of way consists of lanes, median, shoulders, and side slope.
It is the route which can the vehicle move in, in this project we have two way four lane highway, travel lane width is usually between (9-12) ft, most arterial high ways have 12ft width (about 3.6m), and it is the value chosen in our project.
In the two ends of the highway cross section, beside the lanes, the shoulders have to be set out, the functions of the shoulders are:-
1. For drainage water.
2. It gives safety to the vehicles.
3. It supports the pavement structure.
In this project we take the width of the shoulder equal to (3 m).
The side slope is different from site to another, depending on the terrain, type of soil, and the amount of cut and fill, it is important to supports the pavement structure.
Download Civil Engineering Project Report Topic on Highway.