AutoCAD Civil 3D :: Calculating Volumes With Out Of Date Surfaces
May 9, 2013
I have been provided a file with a surface, however I have not been provided with the point files referenced to define the surface. As a result, when I try to calculate the quantities in the volume dashboard using a volume surface, I get the error that the surface is out of date. Is there a way to calculate volumes with an out of date surface?
I am trying to calculate the amount of material required to be cut when creating a flat bottom ditch.
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Nov 20, 2013
We have a good size channel and the section for the channel varies quite a bit. We want to find the volume excavated in the channel between 2 elevations (it is the area of sand per the goetech report)? A template was not used to create the channel surface, breaklines and gradings were used.
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Aug 12, 2013
I am looking to calculate the volume of an existing berm from a TIN surface. I have read through some of the Civil 3D tutorials, and realize that I will need to have two surfaces (base and comparison), but need to figure out how to create the comparison surface.
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May 30, 2012
I have an existing topo surface created as well as grading for a proposed elevated pad of earth done in civil 3d 2013. I simply want to calculate the cut and fill quantities. I created the grading with automatic surface creation checked on. When I use volume tools to see what the quantities are, it says 0.0 for both cut and fill.
I created another surface (TIN) and pasted the existing topo surface and the proposed grading surface into it and I couldn't get any quantities.
I created another surface (TIN volume) and set the base surface as the existing surface and the comparison surface as the surface created from the grading but again could get no quantities.
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Sep 26, 2013
using CIvil3D to figure volumes. I have a very large aerial topo from a couple years ago to compare against a topographical survey I completed this year. No problem creating surfaces.
Question: In the topo's, I need to get a volume from two different areas....one area being a fill area, the other being the borrow area. Don't want any volume data throughout the rest of the site.
Do I just create one large surface for each topo and designate boundaries somehow? Or do I need to create multiple surfaces for each topo? If this is the case, will I need to make sure any breaklines, etc. don't cross from one area to the other?
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Jun 9, 2013
I have create my surfaces and now need a volume between to two surfaces. I created the surface by using the Surface/Create TIN Surface tool for both my OG and the surface after material has been imported. I have gone to the volume dashboard and it will not let me add existing surface. How do I calculate the volume?
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Jun 29, 2012
I have a question concernig a wrong result of computed volume.
EG surface with all EG points H=100.00m
FG surfase, created by FL-Square 100x100m H=101.00m, added to FG surface as breakline.
The Result-Fill=9149.59???
Why not 100x100x1=10 000???
P.S. EG points at above example were around 80, randomly spread at area say 150x150m
When I deleted 76 and moved remainig 4 at the corners of the square, the result is OK 10 000cu.m
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Mar 13, 2013
I am trying to find an easy way of calculating the volumes I have been asked to do. I have a road, with an alignment created along the centreline. I have created a finished surface which incorporates the cutout for the boxing, and I have been supplied with a surface of the natural (original state) ground.
What I have been asked to do is calculate volumes at either 10m or 20m chainages (station).
Obviously, I can create a boundary, and then shift the boundary to where I want the volumes to be, but this road is 3km long, resulting in calculating 150-300 different volumes. The road is not a straight line either and includes a number of bends.
Is there a quick way of calculating this? Or do I need to use the boundary option?
The way they would normally calc it is to add all the details from the cross-sections into an excel sheet, and makesome complex formulas to figure it out. Even doing the boundary method is quicker than that.
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Jun 7, 2012
I have sevreal corridors with various spurs. The contractor wants the cut/fill volume in sections along the corridors, not one big cut/fill calc. Is there a way to do this in C3D? I have got the volume table with the chainages on, but he does not want a cumulitive figure for the whole corridor.
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Aug 29, 2012
I have noticed that the value I get when I use the surface volume comparison tool or look at a graded item in the grading group properties box is different than if I calculate it by hand and the discrepancy isn't even consistant. After spotting this problem in a job I am working on graded two simple ponds to check this. The first one is 100' x 100' and 5' deep w/ 2:1 side slopes. Calculating the volume by hand I get 1500 cu. yds but the grading group properties come up to 1506.17 cu. yds. The accuracy is off by less than 0.5% The second pond is 100' x 100' and 2' deep with 3:1 side slopes. The hand calc gets me 654.52 cu. yds. and the grading group properties reads 655 cu. yds. This discrepancy is closer to 7%. I really need to know if I can trust the volume tools in the program.
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May 1, 2013
I am attempting to take two surfaces and cut straight down through a set polyline and get the difference between two surfaces. Do i want to use the bounded volumes to do this? Or can i simply create two surfaces and and use the analyze/volumes tool and just select the two. I would then add the boundary to each surface to limit the data.
My concern is since the two surfaces do not meet along the edges which will cause the math to be off.
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Feb 23, 2012
I have a few vary large stockpile that i need to get volumes of the stockpile at 1 meter intervals- is there a quick way of doing this, other then finding the area of each elevation and calculating the volumes.
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Jun 1, 2012
I am looking to find out if the is a way of generating a stage storage table or volume table showing only the volume in the pond from the lowest intersecting existing ground contour to the top of the pond (to determine what would spill out of the pond in case of a berm failure) and if Civil 3D could make the determination of where that intersecting point is.
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Jul 24, 2013
I have a manure storage pond that I am trying to figure out the total storage volume for. It has 2.5:1 Side slopes and a 10 foot wide ramp at 10:1 entering the pond to the floor bottom. I am trying to figure out what the volume of this pond is. What is the fastest and most efficient way to get this volume? I do not want it compared to any other surface such as existing ground.
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Oct 18, 2012
I have a big hole in the ground in my model. Its easy to get the volume of cut with C3D. But I have a topsoil layer, weathered rock layer and then solid rock, I basically need to break them down into different volumes. The way I would normally do it is calculate the topsoil, then work out the weathered rock and minus the topsoil, then for solid rock cut I minus the topsoil+weathered rock. I have attached the 3 volumes I need for info.
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Apr 16, 2013
I have a 100 acre park that I am doing earthworks. I have 1 proposed and 1 existing surface. The park is now broke into 5 different areas and I need to get cut and fill for each area. Is there a way to do a volume report for a particular area? I could define the area with a polyline. Or do I need to copy the proposed surface and start chopping up into 5 areas?
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Aug 21, 2012
I have created a volume surface and associated surface legend table using the cut/fill parameter.
The volumes and areas don't seem to add up, take Cut 2 as an example only if the area of the previous (cut 1) was added could this be possible. There is lots of speculation in our office like does the fill work in reverse?
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Nov 20, 2013
My background is actually in Microstation (mainly 2D). I was asked if I could calculate the cut and fill between two topo surfaces. Unfortunately, I don't have the files yet but I will eventually receive them. When I do, what would be the correct method to achieve this task?
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Mar 19, 2012
Is there a way I can sort the columns in the dashboard alphabetically? Normally you just click the title in these windows to toggle the way it sorts it, but you cannot do that with this tool. Its making my cut/fill report look messy, as the surface volumes are not in any order.
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Jun 26, 2013
I'm working on a project to widen a roadway through some mountains. The problem i am having is getting the corridor to apply to a future surface so that i can determine the volume difference. my profiles show there should be some cut and fill, but i cannot get the model to reflect this. when i try to preform a bounded volume i recieve a "the surfaces do not overlap".
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Mar 14, 2013
I am trying to get the cut volumes for areas that are greater than 15ft of cut for my project. We know that we will be able to get the top 15 feet with heavy equipment but will be drilling and blasting anything greater than 15 feet of cut. This is a different pay item, with greater cost so we need to quantify it.
I've got a composite surface that graphically shows me the elevation bands so I can see the areas that are greater than 15 feet but I'm not sure how to quantify the volumes.
Currently using C3D 2012 with the volume dashboard extension. Have 2013 installed just haven't jumped over yet.
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Sep 12, 2005
How I can calculate my area for different slope regions?
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Oct 9, 2013
Whenever I open the Volumes Dashboard in a drawing and then close it, my cursor and my WCS compass start blinking erratically, and the program seems more apt to freeze up when I try to do other things from that point on, especially if I try to move to a drawing in another tab. If I bring back the volumes dashboard, it's fine again, but then I've got the annoying outlining of my volume surfaces that I don't want. how to handle this? Is it just an unavoidable glitch in the program?
(I'm using AutoCAD Civil 3D 2014.)
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May 16, 2013
Any quick way of calculating average Parcel Area? I used to export to LandXML and do an area report in CSV. That doesn't seem to be working for me when I export out of C3D 2012.
The workaround I found was to select all the parcels in Prospector, copy to clip board, paste in excel, find and replace "_Sq. Ft._" with 0, then do the average.
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Sep 19, 2013
I've been learning civil3d for some time now and I really want to understand how the program calculates volumes from road corridors.
When the top code is used to create surface from a road corridor, the created surface coincides with the top of the road pavement (binder/wearing course), which is not part of earthworks.
How can I create a surface at the formation level so as to compute actual earthworks?
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May 7, 2013
In Land Desktop using the Hydrology tools, we could get capacities for rectangular pipes based on slope, size, etc.
I have tried using the Hydraflow Express tools for this, but cannot figure out how to use them for a RECTANGULAR pipe (i.e. 10x4) box. Saw the circular option, but couldn't change where it says circular.
This is not a culvert analysis because we have inlets, multiple slopes, etc. It is part of an entire system.
I use these tools to layout the system before I want to put it into the analyses software we are using.
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Oct 30, 2013
I notice issues using spanning pipe labels for the first time recently after having used them for years. The slope calculated by the spanning pipe label is completely wrong. I've attached a picture in which Labeled two pipes connected by a null structure. The two labels on the bottom are the pipes labeled individually at 3.53% and 3.34%. When labeling them as a spanning pipe, if I choose the downstream pipe first and them the upstream pipe it shows me a slope of 0.48%. If I choose the upstream pipe first, then it gives me 2.88%. Either way it's wrong.
As I was writing this I decided to check and see if the pipes were flowing the same direction (Start to End or End to Start). Turns out they weren't. After flipping one of the pipes around so that they both are laid out in the same direction (Start to End from Upstream to Downstream) the label now reads 3.37%, which is correct.
Seems like an the label should honor the flow direction of the pipe, no matter if they have been laid out in opposite directions or not.
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Sep 6, 2012
i'm jumping into 3d late in life...playing with volumes. i've created surfaces from aerial surveys and have saved the surfaces as separate files. i would now like to run volumes of the two as they represent the same quarry site from different years. it appears (?) i need to have both surfaces listed in prospector to run volumes. each separate file has its own surface listed. question...how do i get (import?) the second surface drawing into one of the files so i have both listed and can run volumes? i see where i can create a surface from importing a .tin file...but i don't see how to export the surface as a .tin file.
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Feb 5, 2013
I am having a problem with my data shortcuts for my surfaces not updating. I have 2 surfaces (one ex and one prop) both are on auto-rebuild. Both of them are in separate files and data short cutted into my profiles files (I have one for water, one sewer and a third for storm drains). Any time I make a change whether I add or subtract data the file the data does not update in the profiles. As a work around I have been creating a new data short cut and adding it to my profiles files. What am I doing wrong that would make them not update?
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Nov 2, 2013
When you paste a surface into another how does it connect the surfaces? Does it create a vertical wall where at the edge of the paste surface? Can you tell it to grade a certain slope to the surface you are pasting into?
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Jun 14, 2013
I'm trying to create a surface under my 'existing ground' surface. There is shallow rock where one of our projects is located and using geotechnical data I want to create a 'rock surface' at the known rock elevations. I just want this surface for visual reasons and do not want it to interact with the existing ground or pipe network.
I have 4 places along the roadway where I know the rock elevations. I created new points around each known point with the same elevation so there would be more than just four points on the surface and so I could make it the width of the road allowance. But when I look back to my profile of the road, it shows the existing profile drop to the rock surface at each place that I created points for the rock elevation. Not sure how to make it so the existing ground surface doesn't pick up the new points I added for the rock elevations.
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