I have been given a road design DXF file. From this I've created my existing surface, design surface, alignment, profile, cross section views and this is the state my current dwg sits.
I have been asked to compute volumes of the drains which is generally fine except for the following "rules" that need to be followed.
1) I must subtract 0.310 from the design surface to use as the "bottom" of drain surface (can be done easily enough)
2) Thinking from a cross sectional perspective now: Where the existing surface cuts through the road batter and reaches the design cut batter - this will be used as the "top" of drain surface
3) If the existing surface doesn't cut through the road batter (i.e. the existing surface is much higher or much lower) then I will keep the grade of the road and daylight it out untill it hits the design cut batter. Essentially projecting the crossfall of the road surface untill it reaches the design batter surface.
Also worth mentioning the road is a relatively simple - straight, right hand bend with super, then a straight i.e. the cross fall of the road isn't always going to be -3%.
These "rules" were how the job price was originally quoted so they have asked me to replicate it and come up with a volume.
I've scratched my Civil 3d brain and am absolutely stuck. The only method I can come up with is create polygons over my cross sectional views where these parameters occur, obtain the areas and do cross sectional end volumes. Which will be relatively inaccurate and very time consuming.
Any help would be huge guys.
Thanks in advance,
Of course, please see attached.
Hopefully it makes sense.
1) Volumes need to be calculated for both situations
2) X-Fall of road changes due to curve
If you have the polylines that represent to CL, Edge of Pavement etc, a corridor could pretty easilty created that would give you what you need. Is that in your wheelhouse?
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