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inverted siphon

inverted siphon

inverted siphon

(OP)
We are designing a storm drain which will cross the TransCanada Pipeline right-of-way and are considering an inverted siphon under the existing natural gas transmission lines to avoid a costly relocation.  There is some concern regarding possible freezing of the siphon. Anybody with experience and/or know a solution to prevent the freezing?

RE: inverted siphon

If the storm drain and/or the siphon freezes will not the surface streams feeding them also freeze?  What are the consequences of that? What is the depth of frost penetration in your area ?  What are the annual surface temperature variations at your altitude ?

good luck

RE: inverted siphon

Is there a constant flow into the Siphon?
1- Place the siphon sufficiently deep to prevent freezing.
2- Make sure you size your siphon pipe is smaller than the   main trunk to promote pressure flow and higher velocities.
3- Other than that you can use a DIP in a casing and connect defrosting wires to the pipes.

RE: inverted siphon

(OP)
The project is in southern Saskatchewan

RE: inverted siphon

Provide catch basins at one or both ends of the siphon and have a plan to do regular cleaning of the basins as well as the pipe.

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