Yes I see the copies you created still have the bad plot style; doesn't fix them like it does for me.
Upon opening the file I get the message the file was created in other than AutoCAD, maybe that created the problem.
Attached is a copy of drawing for which I used the "copy and delete original"...
Something strange is happening with those dimensions. May have cropped in from a program other than AutoCAD?
I notice when copying a problem dimension, the copy does not have the issue.
So I suggest copying dimensions to the same location, then deleting the original, like below steps.
Perhaps...
Could you post a drawing with the offending dimension, I could see if some lisp magic could change the plot style of the text. I have limited rusty skills there.
Estimating with any accuracy is not likely possible. Perhaps can be somewhat, in a controlled environment like the ASCE study linked above.
You didn't mention ground water table level, that's a major factor. And the rate of frost advance is a factor. Even in somewhat consistent soils, the amount...
There have been many Eng-Tips discussions on strip surcharge lateral pressures, you can find in a search.
The one EireChch mentions is a good one:
https://www.eng-tips.com/threads/lateral-earth-pressure-from-surcharges-and-the-2x-factor.330567
It seems apparent the Das formula is in error, all...
The contact area is not a factor in sliding resistance, the resistance=weight x coefficient of friction.
As you recognized, all the weight is transferred to the walls, the void has no 'bearing' on the analysis.
There may be a small portion of the slab weight supported on the soil, but as...
Are 2 layers of reinforcing necessary? Aircraft pavement is typically thicker, and unreinforced (or at least used to be). The steel was not necessary for support/structural reasons. Use of appropriate contraction joints addressed crack control.
You could show it either way, as long as it's well identified which is which. I'd think the road below is more pertinent to the utility installation, so would show the bridge above with less dominant linework, either hidden/dashed, or faded.
If you think the groundwater can be controlled sufficiently to perform earthwork to that depth, why not instead just place the pier below the frost level and forego the subgrade replacement with gravel?
The gravel replacement idea should provide adequate foundation support, as the chance of...
You mentioned 'tolerances', what are they, what is required by the specifications? For a finished surface of earth (vs pavement), a typical tolerance (allowed deviation from design grade) is something on the order of +/- 0.05 feet, or about 1/2 inch. The tolerance would be independent of slope...
That soil type (silty sand), very low blow counts, below the water table, present very high chance of liquefication during a seismic event, leading to settlement, sand boils, etc.
Unless site is in a very low seismic region.
Not all system variables can be set through user accessed settings, but this one can be apparently (I read online, didn’t verify):
Tools/Options/User Preferences/Prioroty for Coordinate Data Entry ... select "Keyboard Entry" vs "Running Object Snap".
