Is there a way to create a site improvement to fill from the bottom of an overexcavation to top of Finish Floor. I can calculate this but would like to be able to have this information on the Earthwork summary.
If not… Any other thoughts
The way I would think of doing it could be.
Make a Demo category calling out EBS and give it thickness and then in your FG pad you would get whatever your improvements you assigned.
Or
If it’s set parameters of over excavation like in the boring or geotechnical reports. I would import that boring picture page, georeference it and define the depth at the locations of the borings with ebs in a demo category.
Just my thought while watching basketball.
Rick
I emailed you last night - If you use the TBC Overexcavation function to create the Overex then the amount of Overex Removal is the same as the amount of Overex Backfill that you need. These numbers are reported on the Takeoff report as a single number - the Overex removal will need to be added to your Earthworks Cut Number (as it is material that you need to do something with, and the Overex Backfill will need to be imported from offsite as a suitable material (Granular Fill etc.). If you have a suitable material on site then you can put the Overex Removal into your Cut Number and remove the suitable material quantity from your Cut Number so the net result is a wash.
Depending on the design of your Overex will dictate whether or not you can use the Overex function for that or not - the Overex is better today than it was because of the Overex Template Manager - however that doesn’t handle conditions at all like Rock vs soil cuts so it is still a bit limited in what it can do.
Alan
Much like Alan stated I will use the over excavation command to quantify my over ex. The qty given is the exact cut so make sure you account for shrinkage if you are going back in the hole with it. Then you just add your site improvement to the area like normal. I’ve used it extensively and I am very comfortable with its function. It also allows you to calculate an over ex that may vary due to the OG surface. I.E. over ex 3’ below footing or existing grade whichever is greater. This function is priceless.
Damon,
Do you have an example you can share using this command?
Let me explain better. I have many projects using over ex but it may not correspond to what your doing.
First thing I do is gather all necessary line work for my improvement boundaries and assign my templates as needed to each improvement. (Keep in mind that your over-ex will calculate from the bottom of your improvement down the specified depth.) Next I need to offset my boundary lines to make OX lines. Here our over ex must be extended horizontally the same distance as the vertical ovex. For example a 5’ Over ex on a building I must offset the pad line 5’ plus 8" to get me five feet outside of the footing. For a roadway I would only need to go 5’ from the back of sidewalk.
These lines all must be trimmed and fit not to overlap one another. One good thing in my experience is that closed OX boundaries inside of another OX boundary will calculate correctly.
My recommendation is to take a simple project and play with it. Pay attention to the new OX surface created and utilize the cross-section tool to make sure you care getting what you need.
As Alan stated at once you calculate this you get an qty of earth that is the actual size of the hole so now you can decide what to do with it. Remember if you’re reusing it you must consider shrinkage.
Also make note that you can specify a depth below existing ground that over-ex must occur. This is handy in areas with SG may daylight over existing ground.
Hope this helps
One thing you will note in this process that you have two options when applying OX to buildings.
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You can do what Damon says and offset the building lines by the OX offset amount and then use those lines to define the OX excavation. The downside of this method is that the OX bottom will follow the shape of the subgrade below FG i.e. if your building has a 2’ subgrade and it buts up against a sidewalk 4’ wide that has a 6" subgrade, you will get a step in the base of OX from 2’ at the edge of the building to 6" because of the step in the subgrade. If you want the OX to be flat bottomed use (2) below.
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You can use the OX Template command to create the shape of the OX around the building. This can be a simple 5’ offset and vertical tie up or it could be a 5’ offset followed by a 2:1 slope or a slope with a bench system etc. as needed. In this scenario the bottom of OX will come out horizontally (no step for the above sidewalk) and then tie up as defined, rather than follow the subgrade at depth with a step like in case 1 above.
The only issue with 2 is that if 2 buildings are close to each other and the ties cross over each other then you need to edit the end result to get what you need in the overlap zone - each building computes its own part of the OX surface, and it does not handle the scenario where two buildings come together - you can explode / extract surface features to convert the OX surfaces into lines and then fix up the lines and update the OX surface etc. as needed.
Alan
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