Learn how to finalize a desilting basin design using the grading creation toolbar in Civil 3D. The article provides a step-by-step guide on setting the right parameters, creating grading, and checking the final design using the object viewer.
Key Insights
- This design process starts by setting correct parameters on the grading creation toolbar such as the dev main site, the dev main grading group, and checking the sieve 203 surface is targeted.
- Next, the creation of grading is carried out by selecting feature lines, specifying distance and relative elevation, and creating a path around the basin for easier maintenance access.
- Finally, the design is checked using the Civil 3D object viewer to verify the cut slope, fill slope, the path around the basin, and the depression for holding stormwater.
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So in this video, we're going to go ahead and finish out this design of our desilting basin. And to do that, we need to get back into our Grading Creation toolbar.
We're going to do that by going up to our Home tab of our ribbon bar, dropping down our grading options, and then selecting our Grading Creation Tools. So from here, we're going to go ahead and make sure that we have all of our parameters set up correctly. We're going to make sure that we have our Dev Main site and our Dev Main Grad grading group.
I'm going to go ahead and click OK. We're going to check our CIV203 surface is the surface that's being targeted. We're going to check to make sure that we are in the C-TOPO-GRAD layer, and we're going to make sure that we're using our DevGrad grading criteria.
So from here, we're going to go ahead and make sure that we're using a Distance Relative Elevation. And then we can look at these parameters. We could edit them and change them, but I want to go ahead and this time change the parameters as we're being prompted to by Civil 3D rather than setting them up correctly and then hitting ENTER, ENTER, ENTER, and then creating the grading.
So from here, we're going to check the style. It's currently set to Residential Grading Display. That's OK.
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Residential Grading Display in this drawing is kind of a catch-all that was already provided in the drawing. So I'm OK with that. We don't want to specify that it's going to be displayed as cut or be displayed as fill.
So let's go ahead and move on from there. We're going to go ahead and drop down now and select Create Grading. So I'm going to go ahead and create this grading.
I'm going to select my feature line as Civil 3D is prompting me to do. I'm going to pick this feature line on the outside that we created in the previous video. Civil 3D is now going to prompt me to select the grading side.
I'm going to pick to the outside because we've already created to the inside of that feature line. Now Civil 3D is asking me to apply to my entire length or not. Yes, I do want to apply it to my entire length.
So I hit ENTER. Then from here, Civil 3D is asking me to specify a distance, so I can go ahead and click anywhere on the screen by selecting a distance. So you can see, as I move this in and out, Civil 3D is updating the distance from the feature line that I'm clicking.
And that could be, say, we wanted to snap to somewhere and choose that distance. That would be OK for me. I know I want to do something like six feet.
So I'm going to go ahead and choose six as my distance, and I'm going to hit ENTER. And then it's asking me a relative elevation. I'm going to go ahead and choose a relative elevation of positive 0.25 feet.
So I'm going to go ahead and type in 0.25 and hit ENTER. And so Civil 3D now creates that grading object for me inside of my drawing. I'm going to go ahead and hit ESCAPE to get out of the Distance Relative Elevation command.
And so what I've done here is I've created a path around the outside of my desilting basin. So somebody can access the upper edge and then do maintenance on it if they needed to. So from here, now I'm going to grade this out and target my surface.
So I'm going to go ahead and select a new grading criteria of Surface. I am going to leave my one-and-a-half-to-one and two-to-one slopes. And then we know that we already selected CIV203 as the surface.
So I am ready to go ahead and create grading. So Civil 3D is asking me to select a feature. Now we only created one feature line associated with this basin, and that is OK because every grading object that you create inside Civil 3D is built out of additional feature lines.
When Civil 3D asks me to select a feature, I can go ahead and select the outer line of that path that we just created. And that will be the feature that I'm using to build this next grading object off of. So I'm going to go ahead and select that outer line.
Civil 3D is going to ask me to apply to entire length. I'm going to say yes. Civil 3D is going to prompt me to do cut slope or fill slope.
Civil 3D is not asking me whether or not I want to go to the inside or the outside because it knows that there's already grading to the inside. So I'm going to go ahead and go to the outside, one-and-a-half-to-one fill slope, two-to-one, and Civil 3D has now created a grading object for targeting the surface of CIV203. So I'm going to go ahead and hit ESCAPE to get out of that command.
I'm going to close this Grading Creation toolbar. I'm going to select the diamond grips so that we can view this object inside of Civil 3D. I'm going to click this diamond over here, and then I am going to find the diamond for my other object.
Now if I can't find it, that's OK. For whatever reason, it doesn't appear to be showing up. I'm going to go ahead and zoom out and regen, and there it is.
It's showing up in red over here. So I'm going to go ahead and go here, here, here, and this diamond here. Now I've selected all of the objects for this desilting basin.
I'm going to go ahead and go to Object Viewer so that we can see if this looks as we expected it to. I'm going to expand this out. I'm going to rotate it.
And so what we're seeing here is a desilting basin with a cut slope on this side, a fill slope on this side, a six-foot-wide path around it, and a 10-foot depression for holding stormwater. So I'm going to go ahead and close this out, escape out to unselect, and then I am going to save my drawing and I'll meet you in the next video.
