Trimble Business Center

You can get the 1m volumes relative easy with the Earthworks report between two surfaces. There is an option to compute in intervals. But that one unfortunately doesn't give you the areas, at least not the old version I've got here right now.

Hi Ronny,

Yes the volume it is very easy, but miss the area with TBC V5.31

Thank you for the feedback

What areas do you require ? of the Finished Grade Surface or the Original Ground Surface or the lift surfaces every 1m (like a sliced area of the embankment at 1m intervals. 

You could contour the surface that you want to calculate the areas from and then explode the contours and make the exploded contours into Linestrings and set them to have property Sharp and Texture boundary - Add the contours to the surface model and then if you then apply a Texture of different type to each area between each contour pair you can then use the Find Surface Area command or the Surface Information Report to determine the surface area of each textured area separately - if you want the finished area of each lift then you will have to create a surface for each lift in order to determine the surface area of each lift.

I would have to get the models from you and a detailed description of exactly what surface areas you need to be able to give you a work process for this - I am sure it is possible

ie are you starting with a corridor or a surface. What areas do you really need - we can build them into the corridor and generate the surfaces or we can define areas in the embankment sides to compute areas depending on what area it is you are chasing.

Fernando

If you have the string lines for the top and base of slope and the center line and edge of top of slope then you can easily create the lines for each layer lift using the Slope Slope Intersection command - this allows you to project out from two pairs of strings to find where eg a Lift Surface intersects the surface slope - that is one way to do it. The alternative is to add theFinished Grade surface to a corridor as a Surface Instruction and then creaye a series of nodes offset from the Centerline of the crest by -1, -2, -3 me etc and then from those nodes, create a left and right tie slope to intesect with Finished Grade Material Layer (check the check box) and that will build you the Material Layers for each lift. Then you can in the corridor create the Volumes and the surface areas of each lift that you need using the Corridor Earthwork Report. Do the whole thing as one corridor and then when you run the Corridor Eartork Report you can add the region boundaries and each one will create its own report in Excel.

I will try to create a simple example to show you how later today.

Alan

Thank for your time on this.

Corridors it was my first option after trying to edit the earthmoving report and create a custom report.

As long as the elevation is higher than the original ground, the calculation is simple and geometric, we don't even need the TBC. Length x width will give area over the section.
The calculation becomes complicated when the elevation is lower than the original ground, because the width varies. Then we have to compare the original ground elevation, not on the axis, but at the perpendicular of the intersection of the side slopes ( with banques/pads) of the final design with the OG. In this situation, the options are divided into at least 2 more:
- Does the elevation intersect the original terrain twice (case with island)?
- Level intersects the original terrain once.
This process becomes too complex for a new TBC user and the high risk of making a mistake, if miss a condition.

Fernando - I have sent you a couple of projects that I hope helped you to get what you need.

You could also contour the OG surface at 1m intervals and then clip the contours to the edge breakline around the FG surface. Then do the same for the FG surface. Then you can use the contours of the same elevation to create the material lift layers if needed. The OG contours inside the FG limits should be closed loops so you can use them to make holes in the Lift Layer surfaces to reduce the volumes and the surface areas.

The sideslope - using Depth Table method can also help find the 2nd or third interface orthe last interface with the FG surface if it comes and goes on a material layer.

Alan