Creating Lift Plan

[SaeidHajahmadi]

Hello everyone,

In our projects, we are frequently constructing pads, and clients often request lift plans. To meet these requests, we generate lift plans for every 300mm and calculate the volume for each lift. When the natural ground is flat, creating the lift plans is straightforward. However, when there are significant variations in the ground height, it becomes more challenging.

What I've been doing so far in such cases is creating a surface for each lift, limiting it between the existing ground and the design surface, then calculating the volume by comparing it to the existing ground. I subtract the volume of the lift below to get the volume for that specific lift.

I assume there might be a more efficient approach. I would greatly appreciate your insights and suggestions.

I'm uploading an example of our projects with the existing ground and the design surface here. 

Thank you!

[ianjchap]

Hi @SaeidHajahmadi,

The approach your taking sounds fine if your getting the right results. I dont quite get what you mean by a 'lift plan'?
However, when I've done something similar and looking for volumes at different levels, one thing that may help (if not already) is by using the design surface and pasting that in to create a surface at the other levels. Once youv'e pasted you can raise and lower the surface to the elevation you need. The timesaving here means you're using the finished design, so if that changes it's dynamically linked to any other surfaces at different elevations.

[essam-salah]

@ianjchap yes what is "Lift Plan", if it's for Cranes idk how is that related to C3D and grading

[SaeidHajahmadi]

Thanks for your approach. Lift plan is kind of local definition of how they will do the back fills to reach to the design level. Copying the surface and lowering it for each lift won't help me with this, cause on the edges where there is batter it will be a parallel surface so mine should have the same batter but lower. I will attach my lifts that I created so it might give you an illustration. 

I was thinking it would be of a benefit if there were such a tool in Civil 3D that by creating the lines on different heights (each lift) in the profile view and that can create a surface on that level by limiting it between the design and existing surface. 

The fastest way that I found was to create 3D solid between design and EG and the slice them in the desired levels but that will be a pain if I want to do any changes or need the surface for each lift. 

I am attaching both.