(48320) Surveying Autumn Engineering Assignment

Assignment 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 Ch 00 on Tucker’s Lane.

1. Using The Plan Provided To Fix The Straights

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.

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. The plan provided has a contour interval of 5m. Assume that the contours are correct with 90% confidence.

Using your plan, by scale, 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 and have a bearing precise to one degree only.) Use Tucker’s Lane as your azimuth.

2. Chainages For The Horizontal Alignment Of The Road

Determine the deflection angle at each I.P Each horizontal curve is to have radius of 57m. 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 of each of the four horizontal curve T.P.s and the end of the road, and any other points listed, and show them all in the table of answers.  You will need to use these values in the rest of your design; e.g. for the end of the road and the TPs.

On your plan, mark the bearing and distance of each straight. Also, plot each TP, and then draw in the horizontal curve. (Freehand is acceptable. If you calculate the external distance, you will have a third point to help you draw the curve.) Then neatly write in the chainages of each TP and the end of your road.

3. Vertical Alignment 

Using the information shown on your contour map, 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 long section.) Scale the distances along the road to each contour and show the results on the table of your answer sheet.

4. Traverse Calculations To Set Out The End Of The Road

A survey party has run an accurate EDM traverse from point X via Y to A, and then connected to the start of the road

5. Horizontal Curve Set Out Data 

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.

6. Survey Party Instructions

There is a survey party at your disposal. They now have the data to set out the end of the road from Point X and the horizontal curves. They made a start on a more detailed survey, as shown below, which allows you to calculate an estimate of some volumes of cut or fill required.

7. Volume Estimation

The survey party has started to do a detailed set out of the road and has levelled every 10m from chainage 10 to chainage 70 along the road centre line with the results shown below.

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