I just got a request from my drainage engineer concerning some earthwork calculations on our pond. He wants to calculate the fill from the existing ground to a specific elevation as well as the cut between the existing ground and the SHWT.
As far as I can tell, the Create Cut/Fill Volumes only calculates absolute cut/fill volumes for whatever models are attached to the file. I have my pond model file and the existing ground attached.
My only thought is trying to clip mask the pond model file above and below these elevations for two separate earthwork runs. I am not sure if ORD will calculate the volumes as if those areas are no longer there if they are clipped. I am not feeling very confident about that particular method.
Has anyone ever tried to do this?
While I'm not sure (still learning about earthwork) you could probably create a terrain at your elevation. You may be able to use that as a referenced model for your calculations.
MaryB
Power GeoPak 08.11.09.918Power InRoads 08.11.09.918OpenRoads Designer 2021 R2
Hi Zachary, I replied in the FDOT forum to your original post. Essentially, my thought is: create a clipped (to pond extents) terrain at your specific elevation and then use the Terrain to Terrain volume option in the Analyze Volumes tool.
Eddie Giese, PEProduction Manager | Senior Roadway EngineerLicensed in FL & PAACEC FDOTConnect Instructor on behalf of FDOT
Patel, Greene & Associates, LLC PowerGEOPAK V8i SS10 (08.11.09.918)OpenRoads Designer 2021 R2 (10.10.21.4)OpenRoads Designer 2020 R3 (10.9.0.91)ProjectWise Explorer CE 10.0.3.453LumenRT CE Update 14 (16.14.60.98)
As MaryB said, create a Terrain Model at the desired elevation and use it for volume computation.
I would create a 2D shape for a boundary or limit of the terrain, create a profile on that element using the 'Profile by constant elevation' and then Create Terrain from Elements to create the planar terrain. Then you can use cut/fill volumes to compute the desired volumes. When you create the planar Terrain Model at your elevation, make sure the Feature Definition selected will use Volume Option = Design so it can compute cut/fill volumes between that surface and your existing.
https://communities.bentley.com/products/road___site_design/w/road_and_site_design__wiki/26534/video-profile-by-constant-elevation
https://communities.bentley.com/products/road___site_design/w/road_and_site_design__wiki/35100/video-create-from-elements-and-analyze-volume
Your results will yield both cut and fill. Your desired results will be either the cut or the fill depending on which direction your computation is between the design surface and existing surface. I would expect the value to be FILL, which may seem backwards, but your design surface (water elevation) will be above your existing ground (pond).
For more information about the Road and Site design tools, visit the Road and Site design WIKI at: http://communities.bentley.com/products/road___site_design/w/road_and_site_design__wiki
Have you tried the "create closed mesh" tool? I can create meshes and extract volume from it. Here's a link with more information on the tool https://docs.bentley.com/LiveContent/web/OpenRoads%20Designer%20CONNECT%20Edition-v14/en/GUID-BDA1E6F8-FC96-4ECD-BB52-62BF0BCC5F0B.html and a video demonstration Video: Create Closed Mesh Element to Depth using Element Boundary
Hope this helps.
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http://communities.bentley.com/products/road___site_design/w/road_and_site_design__wiki
Thank you for all the replies. I feel like its going to be some combination of all the suggestions people have brought up here. I snapped some screenshots of what I have been trying to do.
First screenshot is trying to determine the fill in the highlight area; from existing ground up to the required elevation. Green dashed is existing ground, green is proposed surface, yellow is required elevation.
Second screenshot is trying to determine the cut from existing ground to the proposed surface down to an elevation of 10:
In both cases, I feel like I need to create some sort of combined terrain model between the proposed surface and the required elevation. For the first shot, use the proposed surface, but cap it at the yellow line. For the second shot, use the proposed surface, but cut off everything below the yellow line.
I feel like I need to create a clipped terrain model, but I am missing a boundary. Somehow I need to create a boundary where the proposed surface terrain model and the required surface terrain model intersect so I can use that to clip the required surface terrain model. Then I can create a complex terrain model between the proposed terrain and the clipped terrain model.
Thanks for all the help everyone.
Zachary Billings, P.E.
Senior Roadway Engineer (Licensed in FL and MI)
CONSOR Engineers, LLC
System Info:
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Power GEOPAK V8i Select Series 10 Version 08.11.09.918 | FDOT SS10 Version 01.04.01
ORD Version 10.11.00.115 | FDOT Connect Version 10.11.00.02
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