What are the main aspects of outdoor drainage engineering?

Outdoor drainage mainly involves domestic sewage, industrial sewage and dry sewage. Once the drainage project has problems, it will have a great impact on the city. In order to ensure a good drainage project, it is very necessary to understand the outdoor drainage design specifications and matters needing attention in professional drainage projects, which is also the premise to ensure normal construction. For non-professional friends, you may not know much about this. Don't worry, if you have this demand, you might as well learn about outdoor drainage with me.

Introduction of outdoor drainage

Five structures of outdoor drainage system: inspection well, septic tank, oil separation tank, grit chamber and cooling tank.

1, inspection well

Function: connect (instead of pipe fittings), check and clear.

Location: where pipelines meet, turn, change in diameter or slope, and straight pipe sections at regular intervals.

Composition: well foundation, well bottom, well body, manhole cover and manhole cover seat.

2. Septic tank

Function: Septic tank is used to intercept the sewage with precipitated feces; Treatment of organic matter in sediments by anaerobic fermentation.

Principle: the flow rate is slow, the sundries sink and the supernatant is discharged.

Structure: circular and rectangular; Double grid, three grid.

Septic tank should be set in the downstream section of the household pipeline, on the side of the building facing away from the street, close to the toilet but easy for motor vehicles to clear out.

≮5m from the external wall, ≮30m from the underground water intake structure and ≮ 10m from the pool.

3. Oil separation tank

Function: Collect and remove grease and light oil from sewage.

Location: The grease trap for removing grease should be close to the place where oily sewage is generated, or a grease trap can be set on the indoor oily sewage drainage branch pipe. The grease trap for removing light oil should be located outdoors.

Principle: slow flow, floating oil and skimming oil.

4, grit chamber

Function: remove inorganic substances such as sediment from sewage by precipitation.

5. Cooling pool

Function: Waste water with temperature higher than 40℃ should be cooled before being discharged into urban drainage pipeline.

Principle: Intermittent hot water discharge can be cooled or mixed with cold water, and continuous hot water discharge can fully mix hot water with cold water.

Structure: There are two types of cooling pool: siphon type and baffle type.

Code for design of outdoor drainage

The construction standard of outdoor drainage engineering should be designed and constructed in accordance with the national outdoor drainage design code to ensure the future urban drainage.

Matters needing attention in professional drainage engineering

1. Quality control of reserved holes and embedded casing construction: During construction, the problem of poor drainage caused by debris blocking the pipeline should be avoided.

2. Quality control of water supply pipeline installation and construction: it has a direct impact on the quality of life of residents. After the building structure is capped, the installation company should cooperate closely with the civil construction unit to start the construction of water supply and drainage supervisor and riser.

3. Quality control of drainage pipeline installation and construction: All pipes, fittings and adhesives should be used together to avoid affecting the final quality due to insufficient bonding.

4. Construction quality control of pipeline accessories and sanitary ware: in addition to pipelines, there are installation of pipeline accessories and other equipment and sanitary ware.

5. Quality control of concealed engineering construction: the construction should meet the design requirements, ensure the smooth flow of water in and out, and ensure the tight connection between pipes and appliances without leakage.

Editor's summary: The above is an introduction to the main aspects of outdoor drainage engineering, hoping to help friends in need! Please continue to pay attention to our website for more information, and more exciting content will be presented later. You can also go to Rilong Decoration Mall to buy your favorite products!