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Anonymous Poster #1

Joints in Spillway Structure and Stilling Basin

11/04/2015 5:54 AM

where (at what spacing and location) I should provide expansion joints and contraction joints in an RCC Ogee type spillway structure 42 ft. long, having sloping chute 295' long, and horizontal stilling basin 200'long; total length from crest to end of stilling basin becomes 537'. The width of the structure is 250 ft.

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#1

Re: Joints in Spillway Structure and Stilling Basin

11/04/2015 3:56 PM

What do the blueprints and engineers specify?

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#2

Re: Joints in Spillway Structure and Stilling Basin

11/04/2015 4:02 PM

The joints should be provided IN the concrete, spaced every now and again.

Placing the joints outside the concrete will have little positive effect and use more concrete.

Placing one continuous joint in the entire structure will require no concrete at all and will increase the profit on the job enough to enable you to hire the very best lawyers, when needed.

This is a question that can be answered after much more real information is given to a real civil engineer.

Do your own homework.

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#3
In reply to #2

Re: Joints in Spillway Structure and Stilling Basin

11/04/2015 4:55 PM

Never in my many years of construction have I ever heard this specification for concrete joints!

"The joints should be provided IN the concrete, spaced every now and again."

Thanks for the chuckle Lyn!

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#4

Re: Joints in Spillway Structure and Stilling Basin

11/05/2015 9:25 AM

Is this a new dam design or a rehab of an existing dam? What type of dam? foundation founding and soil or rock analysis?

Have you considered dynamic loads, ie seismic loads, such as horizontal and vertical acceleration coefficients and resultant loads? Hydrostatic loads? Water velocities produced at various flood stages??????

Check out the US Army Corps of Engineers Engineering Manuals (EM series). Here is one (also, check out related USACE EMs, etc etc etc in Appendix A):

http://www.publications.usace.army.mil/Portals/76/Publications/EngineerManuals/EM_1110-2-2200.pdf

You should also check out a whole host of INVALUABLE design manuals published by the US Bureau of Reclamation!

I surely hope that you know what you are doing...

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#5
In reply to #4

Re: Joints in Spillway Structure and Stilling Basin

11/05/2015 4:36 PM

Of course he knows what he's doing, he's using anonymous strangers on the web to fill in the gaps in his education, training, experience, ethics, and understanding of the job he is being paid to do.

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#6
In reply to #5

Re: Joints in Spillway Structure and Stilling Basin

11/05/2015 4:49 PM

Sometimes I have to wonder why I even bother to lend a hand to the clueless and misguided....

LMAO!

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