AutoCAD Civil 3D :: Grading At A Slope To Varied Offset?
May 7, 2013
I am trying to grade up to the base of a retaining wall that is at a variable distance from my known breakline at a certain slope (i.e. 3:1). I know I can set a feature at the base of the wall and "manually" use a reference point and set the slope to 3:1, but I was looking for a more efficient way of doing this?
I am in C3D '09 right now, but we are in the process of upgrading to '14. Maybe (fingers crossed) this is in the updated version.
I am trying to create grading slope from a Feature line that was created at a constant elevation of 609m. I want to create a slope of 3:1 from the feature line to a surface I created. I recall in AutoCAD Civil 3D 2011 that you could create a slope directly to a surface. Is there a way of doing that in 2014 or did I simply forget a step when I created my Grading Groups?
I created the grading group using the Grading Creation Tool Pallet and selecting Set Grading Group. Then I set my target surface to the one I want to grade towards. I thought all I had to do than was go to Create Grading select the direction of grading and the slope. I thought the slope would continue to the target surface but it asked for a distance for grade that would throw off any volumes I want to pull off.
Did I have to create a new surface for my Pad at 609m than grade from that and how would I make sure my slope continues till it contacting the surface I want to target?
On my corridor I am using Link Slope to Surface, using a 3:1 slope. But it is giving me a 3:1 slope radial to the corridor - what I really need is a 3:1 slope between the contours themselves. On the inside of a tight curve, this makes a big difference. See the attached screenshot. Is there a workaround for this?
I am creating some simple grading objects from feature lines. I am targeting my existing ground surface with a 2:1 fill slope. My resulting surface shows me 5' contours, which I think should all be spaced out at constant 10' offsets, but they are not. When I measure the offsets I get different values ranging on 10.2' to 9.7' (depending on the section of the feature line I am looking at). How to make the slope build properly with a true 2:1 offset between contours? What good does this grading tool do if you can't get a properly constructed slope?
I am looking for grading utility in autocad civil 3d. So, i need to smooth my projection slope to target the surface without projection steps. The objective is to correct a surface to implant photovoltaic structures.
I need to daylight to an offset, to create a clear zone/fall zone, but it must have a maximum slope of 6:1. If no daylight is found at the offset and maximum slope, then grade at the maximum slope to the offset then daylight to the target suface at a steeper slope.
"An infill grading has no criteria applied to it. Any area bounded by feature lines or lot lines that is not already a grading can be converted to an infill grading."
So given an area enclosed by a feature line, an infill grading can be created. Using the same features line, an feature line grading can also be created. what is the difference between these two surfaces? They both have no criteria applied to them.
Can you not perform a slope-slope intercept to place a PVI? Essentially holding the sta and elev of the PVI's directly before and after the PVI of interest and changing the grade in and out so that the sta and elev of the PVI of interest are changed.
Can't figure out how to match gutter slope to outside lane super subassembly slope. Have super eop targeting a feature line with elevations, but when i check section editor gutter slope doesn't match pavement slope.
Civil3D 2013 Windows 7, 64 bit Intel i7 2600 @ 3.40Ghz 16 GB RAM Nvidia Quadro 600
i need a shoulder subassembly that varies slope in relation to the lane superelevation slope. i know that i can get a subassembly for the shoulder that will follow the alignment superelevation xml data but in my case i can't use it because we are just adding a shoulder to an existing road. we're not changing the superelevation of the existing road, just milling and overlaying and widening. right now i've created a profile of the outside edge of the shoulder that gives me the correct shoulder slope but whenever i change my centerline profile i have to redo the shoulder profiles which is a real time suck.
I am in the process of transitioning from land desktop to Civil 3D. I design roads in steep terrain and sometimes need to have my catch (daylight) slopes change. So my question is, how do I change a daylight slope at a specified depth? For example, from the shoulder of the road I want a 3:1 fill slope to a depth of 10 feet than change to a 2:1 slope until it catches the existing surface. Can this be built into a subassembly such that if the fill is less than 10 feet it will daylight correctly at a 3:1 and if the depth is greater than 10 feet then it carries the 3:1 for 10 vertical feet and then changes to the 2:1 until it daylights?
I need an offset lisp routine to offset a selected line a set distance on each side of the selected line and change the layer of the offset lines to the current layer, and then keep prompting me to select the next line for offsetting until I'm finished.
I am trying to create a station-offset label style that will drop the trailing zeros in the offset section - e.g. 15' instead of 15.00', but if the offset is not at a whole number, e.g. 15.01, etc. it will display the entire offset.
I created two expressions: IF(OFFSET-TRUNC(OFFSET)=0,.1/12,.00000001/12)
and this one: IF(OFFSET-TRUNC(OFFSET)!=0,.1/12,.00000001/12)
I then created two offset components, one called truncated, and one called full, and assigned the heights to match the expressions.
I have attached the file, the style is ACHD-Sta Off-Rt [copy]
As a recent convert from ProEngineer to Inventor, if it is possible to vary the parameters exported from the source model in the derived part. The following article (see link below) explains the functionality in ProE - note the ability to see the model tree of the source part and also the ability to have varied items (dimensions, suppress features etc.) URL.....
Is there an easy way to raise an entire site by 1.0 foot and have the grading hit the previous targeted surface? The only way I have found is to grab all the feature lines and raise them up by the required amount, but by doing that, the grading bogs down my system and it crashes, plus, I have grading attached to 3dpoly's and not necessarily all feature lines.
I am drawing a pond levy. I draw the outline of the top of the fill, set that at the elevation I want, then grade it down to the existing surface on a 6:1. The grading works perfectly. The outline of the fill's footprint shows up just fine around the back of the fill, but the toe line doesn't show up all along the front side of the fill, but I still get the slope lines projecting down in the front.
I want to cut a channel through a existing surface; bottom width: 5 feet; at elevation 1950 and side slope 1:1 (45deg) up to existing ground.
What I am doing right now is create a feature lines 5 feet wide, at el 1950 and use grading tool to project it to existing ground with side slope at 1:1. What i am doing is correct?
I am working with Civil 3D 2014, I played with 2009 back in 2008 and before that it was Land desktop. I don't know if I am not following a standard workflow.
Build the EG from contours.Layout the CL for the ROW and convert to a horizontal alignments.Create the profiles.Design the vertical alignment in the profile.Create the assemblies for the different types of road sections.Full profile, pavement width assembly, the curb return assembly, the daylight left / right, 1/2 side left / right, and pavement width left / right.Build the corridor, set the target surface as EG or FG, depending on where the section of the corridor is located. (At the edge of the property to EG, then after the first building pad to FG)This is where I have a thought something is wrong. If I am grading the entire site, why would I have the ROW grade to the EG, when I will need the surface to grade from the ROW to the closest building pads?Create the intersections, using the different types of assemblies, per the ROW sections.Create feature lines and use elevation editor to set all the elevations around the pad.Using the Grading creation tool, grade to surface, using a 2:1 side slope. Then adding an infill to the pad.
I keep having the file crash after grading about 10 lots. I recover and it works find, but then the file runs very slow, and will crash. I haven't taken any classes in Civil 3d, and am looking for one in my area.
I am use to creating the vertical surface then creating points along the CL, TBC, FL, BOW then creating break lines along the points. Then create a break line for the pads, and build the FG contours from these break lines.
Say I have a grading that runs north south and goes down 2%, up 2% and so on waffling along. Is it a poor practice to trace the side edge of the grading (in the same site) to add another grading to pitch east west?
I have a building pad where I created a grading of 5:1 to existing grade. I want to change one side to 20:1. How do I go about transitioning the 5:1 to the 20:1. I create the 20:1 and the contours just dead end into the 5:1 grading area
1 - The square helicopter pad is flat and grading with 2:1 fill, 1:1 cut. 2- The second FL is 2% slope down and grading with 2:1 fill, 1:1 cut. 3- The third FL is slope down to meet the existing road, both sides will same cut and fill.
I am creating a helicopter pad, with cut slope 1:1 and fill 2:1. But when i created a transition between the pad and existing road, i don't know how to. I have added a feature lines and make a separate grading but somehow it didn't work.
I have a platform at level 13.275m and nearby there is a retaining wall at aprox. level 4.0m.
For the wall i've made a surface using feature lines from EG till level 15.0m and then pasted into the EG surface to create the 'barrier' for the slope. But when i do the grading with the fill slope projection to surface, when it reaches the retaining wall section, the contour lines go crazy and if i do a quick profile, the fill slope line (obvious) is iregular, rather than a straight down line (2:1) going from level 13.275m till it hits the EG.
I've attached a picture to show the problem better.
I am tring to grade a complex object. Please see the attached document. The two grading objects are not interfacing correctly when graded although i can get the surface almost correct i beleive. Is there a way to remove this issue or the grading will not create a lot of difference when computing the volume clacs ( we are talking volum computation roughly about a million cubic metres cutting).
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.
I have a compost pad and retention pond to design, I set my back Pad line to surface and then graded to elevation so the slope to the pond will have no cuts
I created a pond and left out the grading to surface on the up hill side towards the pad which will be paved one day. I now created two side feature lines to enclose the whole pad and graded by distance and slope.
My problem now is the two side and back seem to blend together as I attached the feature lines together but I can not figure out how to blend into the pond create as it has side slopes to EG and the front which must join to the side slope crest to enclose the pad to drain into the pond.
It has been too long since I created Grading Objects and Proposed Surfaces. I am working in a file with my existing surface DATA Linked. I am creating a grading plan. I have created three separate grading objects in the Site named Proposed. One in the building, One is a new ditch, one is a graded existing ditch. I need to make these three with the unaffected areas of the existing surface into a new surface. How do I accomplish that . All my grading objects appear to be individually accurate and are created with a Feature Line and Grade to Surface Styles.
1 Do I create feature lines at toe , then vertical between the toe and the cliff , then use the grading & elev.editor 2 Once I obtain the infill surface l, how rotate or orient the model w/ rocks so this photo 3 is draped over it.?
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.
