What should be the minimum depth of the foundation sewerage system for the SNIP pipeline: Review + Video

When laying external sewerage, one of the important aspects is the depth of the sewerage .

The SNiPs contain the minimum and maximum parameters of this indicator. There are differences in pipe-laying methods and other parameters. In this article, we will consider options for the depth of the sewer laying.

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SNiP recommendations

Recommendations on sanitary standards when arranging sewage:

1. The bookmark of external sewerage networks is made on the basis of the drawn up projects, which include the places of engineering networks located in the ground, as well as - schemes for the development of settlements;
2. When a project is drawn up it is necessary to take into account, the fact that in the future the load on the sewerage system will increase;
3. Drawing up a plan for laying the sewerage system must be developed in conjunction with the design of the water supply system.

But still, the depth of the sewerage network may differ from the recommendations of SNiPs, this is due to the peculiarities of the soil in different localities.

For example, the conditions for the construction of the sewerage network in Krasnodar will significantly differ from the conditions for the construction of the sewerage network in Vladivostok.

There are many things to consider when creating a quality sewage system. The SNiP rules indicate not only numbers, but also information that allows the laying of sewer pipes at the optimal depth for each region and area.

Sewerage installation

Parameters

The depth of laying the sewer pipes depends on the following parameters:

1. From the method of laying sewer pipes; (whether it be trays or laying in "open form");
2. From geological conditions and from what composition of the earth on the ground where pipes will be laid;
3. From how much the soil freezes ;
4. From the type of sewer system to be laid (pressure or gravity);

Disadvantages of deep laying

Many are sure that for the reliable functioning of the sewer it is necessary to bury the sewer pipes much deeper.

However, this opinion is erroneous, because:

• money and labor costs increase,
• maintenance of the sewer system becomes more complicated,
• At great depths, cracks can form on the pipe surface.

Depth in numbers

The above problems are not needed, for this reason it is necessary to act reasonably and rely on the minimum depth of the sewer system laid down in the SNiP.

At the outlet, sewage drains have a rather high temperature and therefore they do not freeze even in the cold, due to this they do not freeze on the way to the drain pit or collector.Therefore, it is possible to reduce the pipe laying depth if the distance from the outlet to the pit or collector is not large.

Minimum depth

If the loads on the ground are high, then the sewer pipes should be laid 900 mm in the ground. There are situations when it is necessary to reduce the minimum laying depth of sewer pipes, for example:

1. When connecting special pumps, which are designed to quickly cleanse the pipes from wastewater, this is necessary to protect them from freezing;
2. When operating structures with a good strength indicator;
3. When insulating individual sections of the sewer system with earth.

For wet soils and for soils with rock particles, the SNiP contains recommendations on laying sewer pipes to a maximum depth of not more than 4 meters.

For dry land it is recommended to lay pipes to a depth of 5 to 8 meters.

Maximum depth

In the event , if the project standards need to be exceeded, the sewer pipes are placed in reinforced concrete trays, so they are able to withstand a heavy load and thereby protect the pipes from damage.

So, if all conditions are met, including climatic ones, if high-quality and correct materials are selected, the sewer system will last a long time, without freezing and various types of breakdowns.

Better, of course, to turn to trusted professionals, because they will be able to efficiently perform all the work on the arrangement of the sewer system. We hope our article was pretty informative.

We wish you luck and patience!