civil engineering question

[east or bust]

I am on a capstone bridge replenishment/replacement project and am trying to tackle the hydraulics section of the report.

Currently stuck on how to calculate the flows that will adequately pass under the bridge. I've already determined Q2, Q5, etc. to Q500. A state requirement is given as flows up to Q100 must pass with no overtopping, and flows at Q50 must pass with 1' of freeboard.

I have the flows, slope, manning coeff., and x-sectional area under the bridge.

How do I relate all that to the water height? I'm guessing some variation on the Manning eq. but it seems like I have too many unknowns. Maybe I am over complicating this.

[twodogs]

y=mx+b

[reckless toboggan]

y=mx+b

y=mx+b+E

[GeezerSteve]

[irul&ublo]

I'm guessing some variation on the Manning eq....

Then the answer is: Omaha

[PNWbrit]

Tech Talk Jong.

[Timberridge]

Wait... you are asking TGR how to build a bridge? A real bridge, not like a Sr project fake bridge, or a few planks to cross the seasonal steam out back, but a real bridge that will span a real river on a public road?

Really?

That buses drive over.

[iceman]

That buses drive over.

Well, with any luck.

[east or bust]

Wait... you are asking TGR how to build a bridge? A real bridge, not like a Sr project fake bridge, or a few planks to cross the seasonal steam out back, but a real bridge that will span a real river on a public road?

Really?

You obviously have no idea what a capstone project is. We are not building anything.

[babybear]

I believe this thread is a humblebrag attempt

[east or bust]

That buses drive over.

No buses going up this little mountain road.

[iceman]

You obviously have no idea what a capstone project is. We are not building anything.

Are you getting a bit huffy? After asking TGR for help on your engineering project?

[irul&ublo]

You obviously have no idea what a capstone project is. We are not building anything.

Why would we? We're all dentists

[PNWbrit]

You obviously have no idea what a capstone project is.

Is it anything like veneers?

[nwslider]

I'd ask your adviser what the typical industry method for calculating this is.

Otherwise you could solve mannings equation using the hydraulic radius at road level and with a foot of freeboard and compare that flow to Q100 and Q50.

[DJSapp]

I am on a capstone bridge replenishment/replacement project and am trying to tackle the hydraulics section of the report.

Currently stuck on how to calculate the flows that will adequately pass under the bridge. I've already determined Q2, Q5, etc. to Q500. A state requirement is given as flows up to Q100 must pass with no overtopping, and flows at Q50 must pass with 1' of freeboard.

I have the flows, slope, manning coeff., and x-sectional area under the bridge.

How do I relate all that to the water height? I'm guessing some variation on the Manning eq. but it seems like I have too many unknowns. Maybe I am over complicating this.

Q/v = A

If you have manning's eq, you have velocity for each flow. After that, you should be able to figure it out with flow rate and x-sectional area. Cubic feet per second and whatnot. Beyond that, water depth will vary depending on the shape of the channel.

And Mtngirl, we're not all dentists here. I just moonlight in dentistry.

edit: sorry, that should be little v, not volume.

[east or bust]

y=mx+b

F=MA would have been funnier

I believe this thread is a humblebrag attempt

Nothing to brag about here, just a school project. There were way cooler ones that I didn't get.

[iceman]

ah, school. I feel a little bit safer now. I think most assumed you were getting paid to know this shit.

[babybear]

Nothing to brag about here, just a school project. There were way cooler ones that I didn't get.

i was just picking on ya

watch out for trolls under that thing though

[Todd Zander]

haha mtncunt questioning people seeking advice on tgr, classic.

[KQ]

The Capstone Project is a two-semester process in which students pursue independent research on a question or problem of their choice, engage with the scholarly debates in the relevant disciplines, and - with the guidance of a faculty mentor - produce a substantial paper that reflects a deep understanding of the topic.

[DBdude]

Is it anything like veneers?

beat me to it - damn

[riser4]

beat me to it - damn

Wait. I thought he was building a bridge, not a dam.

[abraham]

You obviously have no idea what a capstone project is. We are not building anything.

Capstone goes at the top of the arch.


You're welcome. Now you can build a bridge

[riser4]

Capstone goes at the top of the arch.


You're welcome. Now you can build a bridge

Or hire the Chinese to do it. Schwinn!!!