I think I already know the answer, but I'll ask anyway.
Got a concrete pavement street job with curb and gutter. There are about 10 street intersections at varying angles, curb and gutter on them also. Profiles are all over the place, up intersecting down, up intersecting up, down intersecting down, so there are a lot of cross slope transitions to get from the cross road typical section to meet the profile of the mainline. To complicate even more, at each intersection the mainline widens 2-4 feet from the typical section out to the end of the radius. Lots of chances for puddles.
Does anybody have a good method of generating the intersection grades? I've done a lot of them, intersecting profiles around the radius and such, but they are always a pain. Every one is different. Asked the state if anybody had worked them up and just didn't put them on the plans, answer was no, didn't have time, but the ones I've seen them do usually don't work anyway. So I'm stuck with it, just hoping somebody may have come up with some good ideas.
what program are you using to design this?
Terramodel
I always set grade and/or blue top at the break point of the profiles and let the concrete crew decide how they wanted to form and pour.
Usually they would set their forms on top of my blue tops an section the pour that way.
😉
If it was easy, anyone could do it.
D. Murray
Theres another one of those old sayings that our mentors used to say.
Just kick back and enjoy the brain excercise.:-)
I used to enjoy the challenge, now it's just another mind-numbing thing to mess with.
Eddycreek, not a 'method' but a handy check if you have the design as a 3D model with points etc, is to contour the whole thing at a very close interval, say 1 or 2".
Water runs at right angles to the contour lines and any steps or abrupt changes in the lines will show up design errors.
Eddycreek, not a 'method' but a handy check if you have the design as a 3D model with points etc, is to contour the whole thing at a very close interval, say 1 or 2".
You are so right about that!
I've been preaching that to my enginnerd colleagues for years!
Whenever you need to design a parking lot or intersecting roads that are flat do the contours in 1/4', or as you reccomend 2" intervals (even 1").
Then you pick up those curb cuts and low spots that 1' contours just don't. It used to be that trying it would crash the file because there was too much data, but with todays computers that shouldn't be an issue, if it is you need to upgrade.
I always set grade and/or blue top at the break point of the profiles and let the concrete crew decide how they wanted to form and pour.
It's not clear to me at what scale you're working, but there's a lot to be said for the above.
Of course, they have to be told what the important grades are, but I generally let them (gotta have a good crew) make it work.
It's an interactive process, accompanied by some good natured ribbing to break the boredom.