I Tabulate data needed to set out, using tapes, a circular curve of radius 600 m...

 

Transcribed Image Text:

I Tabulate data needed to set out, using tapes, a circular curve of radius 600 m to connect two straights deflecting through an angle of 18°24'. The measure of the length from the starting point of the scheme to the intersection of the tangents is 2140.00 m. Assume 30m peg spacing. a) II Why is setting out using tapes not appropriate for this project, assuming project date? b) Three straights AB, BC and CD have whole circle bearings of 30°, 90° and 45° respectively. AB is to be connected to CD by a continuous reverse Curve formed of two circular curves of equal radius together with four transition curves. BC, which has a length of 800 m, is to be the common tangent to the two inner transition curves. Determine the radius of the circular curves if the maximum speed is to be restricted to 85 km/h and a rate of change of radial acceleration of 0.3 m/s obtains. (figure below). Transition curve Circular curve Circular curve Transition curvé c) From Question 3 b), give (i) the Offset, and (ii) the- deflection angle, with respect to BC, to locate the intersection of the third transition curve with its circular curve I Tabulate data needed to set out, using tapes, a circular curve of radius 600 m to connect two straights deflecting through an angle of 18°24'. The measure of the length from the starting point of the scheme to the intersection of the tangents is 2140.00 m. Assume 30m peg spacing. a) II Why is setting out using tapes not appropriate for this project, assuming project date? b) Three straights AB, BC and CD have whole circle bearings of 30°, 90° and 45° respectively. AB is to be connected to CD by a continuous reverse Curve formed of two circular curves of equal radius together with four transition curves. BC, which has a length of 800 m, is to be the common tangent to the two inner transition curves. Determine the radius of the circular curves if the maximum speed is to be restricted to 85 km/h and a rate of change of radial acceleration of 0.3 m/s obtains. (figure below). Transition curve Circular curve Circular curve Transition curvé c) From Question 3 b), give (i) the Offset, and (ii) the- deflection angle, with respect to BC, to locate the intersection of the third transition curve with its circular curve

Answer rating: 100% (QA)

a I... View the full answer