Design Private Road to Rural Property Report Writing - Engineering Assignment Help

Assignment Task

Task

Using the plan provided, and meeting the criteria set out below, you must make a preliminary design for a private road to access a rural property.The three straights of the road have been shown on the plan. The road starts at Ch00 on Tucker’s Road.

Using The Plan Provided :

1). The plan was originally drawn at a scale of 1:2,000 but after scanning and printing it may not now be at that scale. 

2). You must find the scale of your plan.

3). As well as the bar scale showing 100m, there are three surveyed lines, for which precise horizontal distances are known and are shown on the next page. Measure each of the four lines in mm and show these measurements in your answer sheet. Using the given (true horizontal) distances, compute the scale of your plan and state.

4). Using your plan find the bearings and distances of each of the three straights. Quote your answers to the nearest metre and nearest degree and adopt these values as being fixed for each straight. (i.e. each straight will be exactly an even metre long) Use Tucker’s Rd as your azimuth.

5). Mark the bearing and distance of each straight on your plan. This must be attached to your answer.

Horizontal Aligment :

1). Determine the deflection angle at each I.P.

2). Calculate the tangent distance and arc length for each curve (to 2 decimal places) and show them in the table of answers.

3). Calculate the changes (to 2 dec. places) of each of the four horizontal curve T.P.s and the end of the road, . Scale and list the chainages (to 1m) of the riverbanks. 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.

Vertical Alignment :

1). 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.) 

2). Design a vertical alignment of the centre line of the road showing grades and vertical curves. The vertical alignment must meet the following criteria:

3). 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. 

4). 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. You must aim to keep the road (i.e. the cut or fill) within 1.5m of the natural surface. If this cannot be achieved in a maximum of 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. 

5). Calculate the Design Levels at every 10m of running chainage along the road. Also calculate the chainage (to 2 d.p.) and RL of the low point of the road at the river crossing.

Horizontal Curve Set Out Data :

1). Please calculate the data needed to set out each horizontal curve from its first T.P. by deflection angles and long chords. The points to be set out are: running chainages of every 10m along the road (i.e., 120, 130 etc), the Crown of the curve and the second T.P.

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