Analysis of changes in the velocity diagram of gravity sewer networks with different thickness of sediment layer in the chute section of pipes
https://doi.org/10.21285/2227-2917-2022-3-368-373
Abstract
The practice of operation of gravity sewer networks of domestic wastewater shows that sediment deposits are formed in the chute section of pipes at certain velocities of the gravity flow. These deposits affect the hydraulic characteristics of the flow, which depend on the actual thickness of the sediment layer in sewer pipes. In this study, a velocity diagram reflecting the distribution of actual velocity values of wastewater flow along the depth of the wetted perimeter of pipes with sediment deposits in their chute sections is established. To this end, the dependences derived by the authors previously for hydraulic calculation of drainage networks with internal sediments were used. It is confirmed on a specific example that the limiting value of sediment thickness preventing the continuation of further operation for concrete pipes with a diameter of 400 mm equals 80 mm. The obtained diagram of the vertical velocity distribution of sewage flow can be used to determine the actual pipeline fill level corresponding to the actual sediment layer thickness in sewer pipes.
About the Authors
O. A. Prodous
LLC “INCO-expert”
Russian Federation
Competing Interests:
Russian Federation
Oleg A. Prodous - Dr. Sci. (Eng.), Professor, General Director, INCO-Expert LLC.
37/1, letter A, Moskovskii Ave., Saint Petersburg, 190005
Competing Interests:
None
D. I. Shlyichkov
Moscow State University of Civil Engineering (National Research University)
Russian Federation
Competing Interests:
Russian Federation
Dmitry I. Shlyichkov - Cand. Sci (Eng.), Associate Professor of the Department of Water Supply and Sanitation, Moscow State University of Civil Engineering (National Research University).
26 Yaroslavskoe Shosse, Moscow, 129337
Competing Interests:
None
A. A. Malysheva
Moscow State University of Civil Engineering (National Research University)
Russian Federation
Competing Interests:
Russian Federation
Anna A. Malysheva - Cand. Sci (Eng.), Associate Professor, Associate Professor of the Department of Heat and Gas Supply and Ventilation, Moscow State University of Civil Engineering (National Research University).
26 Yaroslavskoe Shosse, Moscow, 129337
Competing Interests:
None
References
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Review
For citations:
Prodous O.A., Shlyichkov D.I., Malysheva A.A. Analysis of changes in the velocity diagram of gravity sewer networks with different thickness of sediment layer in the chute section of pipes. Izvestiya vuzov. Investitsii. Stroitelstvo. Nedvizhimost. 2022;12(3):368-373. (In Russ.) https://doi.org/10.21285/2227-2917-2022-3-368-373
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