Cut and Fill Calculations
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- Опубліковано 19 вер 2024
- In this video, I want to show you how to calculate the amount of spoil that will need to excavate if we were to level our building site to a given reduced level using the Grid Method. I will also show you how to work out the reduced level that will give us no spoil to remove.
A blank form can be found here: docs.google.co...
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For similar videos check out • Grid Survey
thanks mate you explained what my teacher tried to explain in 3 hours you did in 9 mins
Thanks Mate, sorry to hear that but glad i was able to help.
Nice and clear explanation, really easy to understand. Thanks
Thanks Mark, I'm glad it was helpful!
Hey mate, how would you apply that calculation method using a footprint overlay with no squares?
Unless you can place a grid over the plan and get the readings for the intersections you cant, sorry.
Great Video.
Just a question why at the end you times 5 by 5 of Grid measurements to calculate the volume? Cheers
In this example 5m x 5m was the size of the original grid on the ground when the readings were taken to get the surface reduced levels. hope this helps.
Great tutorial video.
I am student .. and thankyou so muchh for thissss😭✨
Hi Haniy, thanks, glad you like it.
Hi Mate thanks for the great video! I understand this, however my assignment states that a bulking factor of the soil is 1.25. Do you know how this would affect the calculation of the volume?
Hi mate, thanks for your comment, i would take the 1.25 to be the factor that you need to multpy your total by. So say you got 100 cubic metres of excavated material 100 x 1.25 (25%) = 125, so you would need enough trucks to carry 125 cubic metres to carry it all away due to the bulking factor. Hope this helps
Since contour lines 11 and 12 weren't presented on your survey sheet, it would not easier to understand the relations between those grids, and I didn’t see any fill?
Hi, Sorry I am not sure that I understand the question. There are no contour lines on this plan, I am using the RL of each corner of a Grid the we would have got from conducting a Grid Survey of the site.
@@Buildsum If you interpolate the spot elevations, you will find contour 11, 12 on your site. In fact, counting each overlapping spots is not necessary if proceeding it cell by cell, and it somehow could avoid confusing. Here is my way to calculate it manually:
There are 7 grid cells on your survey sheet, (I label the cells from left to right, top to bottom).
( Step 1) find the difference in elevation for all corners of each cells
cell 1: 0.09+0.17+0.14+0.36=0.76 m;
cell 2:0.17+0.51+0.36+0.5=1.54m;
cell 3:0.51+0.7+0.5+0.85=2.56 m;
cell 4:0.7+0.85+0.85+0.94=3.34 m
cell 5:0.14+0.36+o.31+0.4=1.21m
cell 6: 0.36+0.5+0.4+0.7=1.96
cell7: 0.5+0.85+0.7+0.89=2.94
(Step 2) Add up all the cutting depths of 7 cells=14.31 m, and then dividing by 4 (corners) = 3.5775 m,
(Final step) 5m x 5 m (grid size) x 3.5775 m= 89.4375 cubic meter.
You are doing it the long way, just multiply number times each level occurs by the grid level at that point then divide the overall total by total number of grid points and you get same answer in half the time.
Hi Seamus, good to know, thanks for sharing.
@@Buildsum Hi guys, can you please explain the method Seamus uses in more detail? Thank you.
Hi Seamus, I would like to see the workings of your explanation.......I learnt it the exact way as what buildsum has explained and it is pretty fast once you understand it.
Hi,
Can you elaborate calculation for fill ? Just to make sure
This is one method of calculating the amount of soil (spoil) that you would have to remove from a site to level it to a nominated Reduced Level(R.L.). At the end of the video, I show you how to work out the R.L. that would be required if you were to use the material that you cut from the site to fill in the low spots and bring the site up to the nominated level.
@@Buildsum Thank you.
If we have squares of unequal areas and our grid points forming a part of it
what should we do sir/
Hi, to use this method you have to set out a even grid patten for your readings. If for some reason you couldnt i guess that you could work out the area of the shape that you have and mutiply it by the average depth but i have not seen a method or formula to do this.
@@Buildsum Thank you a lot!!
Appreciate it
If you wanted to work with the slope of the land, how would you determine how many steps and what level to place them?
Hi Casey, the first thing is to work out the size of the step that you are going to use. These generally made to work brick courses or blocks as this will safe the bricklayer cutting. You can then divide the difference in height from corner to corner and divide it by the height of the step. As to where this will depend on the slope of the ground. You can work this out by getting the height of the top of the footing on the high side and then work out where it is going to come out of the ground, that is where the step should be.
This video may help, ua-cam.com/video/FqVNgtQkICI/v-deo.html
I need a help grid lines how to use on excavation in civil
Hi Mate, these might help
ua-cam.com/video/urfklTv7gb8/v-deo.html
ua-cam.com/video/A68rLBsXpUg/v-deo.html
Hi Buildsum, i have a similar site like this however the problem i have been given does not have the levels in the corners directly, i am confused on how to approach this because this is the case. Also great video, is there any possibility for guidance on this matter?
Hi Max, in order to get the Reduced levels (R.L.s) of the corners you need to have conducted a Grid survey and then take those reading and convert them to the Reduced levels using a Level book. Once you have the R.L.s you can use them to calculate the corner heights and therefore the excavation required.
Hope this helps
Why do you divide by 4 twice?
Hi Alex, that is just the way i have layed the steps out, you only divide by 4 once.
Lovely
Thanks Mate.
Hi Dude, Firstly love all your videos, without which i wouldn't be completing my Cert 4 lol, quick question, what happens if you have calculations in the corner height column and product H &N column that are a negative? do you subtract these from your positive calculations? or total them in a separate calculation to get your fill volume? Many thanks, Marty :)
Hi Martin, negative figures are just subtracted from the positive one.
@@Buildsum Thanks Dude :)
Sir please send Software download link
Hey Buildsum why do you times it by 5 and than 4?
Hi Dean wi multiply by 5 because that was the length / size of the grid on the ground when we took the survey. We then Divide by 4 as there are 4 corners per grid square.
Hope this helps
@@Buildsum cheers legend