Vortex Drop Shaft

[Ginger]

Are there any good reference works out there on the design and detailing of spiral vortex drop shafts? From my searches so far there appears to be some work on numerical analysis but very little on how to determine the shape of the concrete vortex guide walls or guidance on calculating flow capacities of the structure.

I believe that physical models are often used to determine the performance of the vortex but some theory behind it would be useful

Thanks in advance

 

[rconner]

I'm not exactly sure what your application is, but I noticed per

http://www.jjg.com/2_News.asp?n=6

that a sizeable project designed by Jordan, Jones, and Goulding Engineers with quite deep vortex drop shafts for wastewater near Atlanta recently "was named the Outstanding Civil Engineering Project of the Year at the 2005 Georgia Section of the American Society of Civil Engineers". While I'm not familiar with specific aspects of the "vortex" design, I believe the drop shafts on that project were constructed in that case with large diameter ductile iron piping, and smaller vent shafts were constructed likewise with ductile iron piping.

 

[dicksewerrat]

City of Mpls. installed a few of these on the end of force mains to cut the H2S production. Call them up. 6120673-3000 is the generic number. they can direct you to Engineering Services, Sewer Design.

Richard A. Cornelius, P.E.

http://WWW.amlinereast.com

 

[cvg]

Arizona Department of Transportation installed several very large stormwater intake spiral vortex drop shafts which connect into a stormwater tunnel under the Papago Freeway in Phoenix. I believe they are 10 - 20 feet in diameter. Contact ADOT to get more information on the design.

http://www.dot.state.az.us/index_docs/Contact_ADOT.asp

 

[mflam]

If you want to go way back, see if you can find the hydraulic studies that were done by John Laboon in the early 50's for the Allegheny County (Pittsburgh)system. Carnegie Tech (now Carnegie Mellon U.) produced most of the reports. Perhaps the CMU engineering library can be of assistance.

 

[bltseattle]

Might be something in the Hydaulic Design Criteria of the USACE

http://chl.wes.army.mil/library/publications/hydraulic_design_criteria/