Bearings and Distances of Each of the Three Straights - Engineering Assignment Help

Assignment Task

Task
Determine the deflection angle at each I.P. 
Each horizontal curve is to have radius of 43m. Calculate the tangent distance and arc length for each curve (to 2 decimal places) and show them in the table of answers. Calculate the chainages (to 2 dec. places) of each of the four horizontal curve T.P.s and the end of the road, (10 Marks). Scale and list the chainages (to 1m) of the riverbanks. (2 Marks). You will need to use these values in the rest of your design, e.g. in the longsection for the end of the road and plotting the river crossing. On your plan, plot each curve. (Calculating the external distance will give you a third point to help you draw the curve freehand.) Also clearly show the lengths of each straight (IP - IP) and the bearing of that straight. 

VERTICAL ALIGNMENT
Using the contours on the map provided, draw a longsection of the Centre Line of your road at scales; horizontal 1:2,000 and vertical 1:200. (Please read the submission section for detailed guidance about drawing the longsection.) Design a vertical alignment of the centre line of the road showing grades and vertical curves. The vertical alignment must meet the following criteria: The road must start at RL 15.3 and must finish exactly at RL 25.3 at the chainage you have calculated as being the end of the road. Assume that the Natural Surface RL at the end of the road is exactly the same as the finishing RL of the road.The first IP of the vertical design must lie at Chainage 90 and RL 7.83. After that you must complete the vertical design using two (2) (or three at most) rising grades and one falling grade, which generally follow the land surface.  four new grades, complete your design using four grades and then make a brief report and explain where the road has excess cut or fill and by how much. The maximum grade allowed at any point along the road is 10%. Vertical curves must have lengths of only 60m, 80m or 100m. The I.P. of each vertical curve must be located at an even 10m chainage (i.e. 120, 350 etc. and must not be placedat odd locations such as 376.5). All grades used must be to no greater precision than 0.1%, except for the final grade to the end of the line. (i.e. grades such as 3.1% must be used for every grade, except the final one where additional decimal places may be shown, if necessary, to ensure that the Design RL meets the set RL.

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