Design the pavement, Mechanical Engineering

As spring approaches, your design rm has been tasked with designing a two-lane highway in rural Wyoming. The highway descends a hill, crosses a river, and must shift to a parallel alignment on level terrain. You must design the vertical alignment, horizontal alignment, and the  exible pavement. Top-view and pro le diagrams are on the next page, and more details are as follows:

 The river crossing must occur where indicated in the diagram. For right-of-way reasons, the horizontal alignment must be straight until station 140+00, and the transition to the new alignment must be completed within 3000 ft (measured along the original alignment, as shown in the gure on the next page.)

 The natural terrain is level at elevation 7100 ft until station 100+00. Between station 100+00 and 120+00, the elevation of the terrain bears a striking resemblance to the curve 7050+50 cos(x=2000), where x is the distance past station 100+00 in feet. From station 120+00 onward, the terrain is level at 7000 ft.

 If you can, design the alignment to be safe when traveled at 65 mph; however, you may lower the design speed for short sections if necessary. If you do so, this must be indicated in your report.  If you use superelevation on your horizontal curves, there must be a traight transition section between the curves of 60 feet per 0.01 change in superelevation. (For instance, if one horizontal curve has e = 0:03 and the other has e = 0:02, you need 300 feet of transition (because the two curves are banked in the opposite direction).

The average daily volume is 23,000 vehicles in each direction, with 90% of them passenger vehicles and 10% semi-tractor trailers. This volume is expected to grow by 2% per year.

Assume that passenger vehicles on average weigh 2000 pounds per axle, and that the semi-tractor trailers each have two tandem axles with a 34,000 pound load, and a single axle with an 8,000 pound load.

 Design the pavement to last ten years with a reliability level of 95%, with initial and nal serviceability indices 4 and 2.5, an overall standard deviation of 0.45.  Water drains from the pavement within a week, and the pavement is saturated with moisture 1% of the time.

 The resilient moduli of the asphalt concrete, base course, subbase, and subgrade materials are 300,000 psi; 21,000 psi; 11,000 psi; and 8,000 psi, respectively.

Posted Date: 3/11/2013 12:57:59 AM | Location : United States







Related Discussions:- Design the pavement, Assignment Help, Ask Question on Design the pavement, Get Answer, Expert's Help, Design the pavement Discussions

Write discussion on Design the pavement
Your posts are moderated
Related Questions
Q. Corrosion resistance of tantalum? Tantalum is readily attacked by strong alkalis, even at room temperature, and therefore, is not suitable for use in processes where the pH

What are combined footings? COMBINED FOOTINGS: When a footing supports two or more columns in the same line, it is called a combined footing. The combined footing which supp

I want complete information about the topic torsion of cylinder and torsion rigidity.if I have to make a project on this topic then how should I make it. Please help me sir.

Q. What is Pipe Rack? Separation between pipe racks and process equipment provides access for operations, maintenance and to reduce involvement from adjacent fires. Process equ

Compute the angular velocity of bar: A bar AB as shown in slides so that its bottom point A has a velocity of 4 m/sec to the left along the horizontal plane. Compute the veloc

The Cu-Sb system contains 2 eutectics, 1 eutectoid, 1 peritectic and 1 peritectoid. Mark them all on the figure, write down the temperature and composition of each point, and ident

Classification of welding Based on Mode of Energy Transfer Energy is converted from one form to another. Any form of energy can be converted to heat energy, which can be used f

The figure shows a "square cavity flow". In this flow the cavity is filled with a fluid and the lid of the cavity moves with a constant velocity, while the other walls remain stati

Open cover left crank case and check shifter drum bolt and washer: Check shifter drum bolt torque and washer direction and avail ability.

Define the term Engineering Mechanics Sol.: Engineering mechanics is the branch of science, which deals the action of forces on the rigid bodies. Everywhere we feel applicat