If you are thinking about what depth to dig the sewer pipe, then first you need to familiarize yourself with the technology of the work. It is also important to choose the right building materials, since 50 percent of success will depend on this.
Material selection
In order for the sewage system to cope with the tasks assigned to it as efficiently as possible, it is necessary to observe the pipe laying methodology on the site. To equip the external system, it is recommended to use polymer smooth elements that are orange. If the installation depth is significant, and the pipes will be affected by dynamic loading, it is recommended to choose corrugated two-layer structures made of PE or PP.
This is true for cases where the sewage system passes under roads and pedestrians. The pairing of polymer pipes is carried out using fittings as bends, couplings, as well as adapters.
SNiP P-G.3-62
When working, you must use SNiP. Sewerage, according to these rules, is laid using pipes whose diameter is 110 millimeters. If the products are orange, then this just indicates their purpose, that is, they can be laid outside the buildings, in addition, they are more durable and durable compared to gray products. The latter are used in the arrangement of internal systems.
Pipes for external sewage are not subject to corrosion, all kinds of damage and during installation with the correct slope do not form blockages due to the inner walls, which are smooth. The permissible depth of such products is 3 meters.
Features of laying sewer pipes
When carrying out the described work, you should use SNiP. Sewerage will last for a long time. First you need to prepare trenches. You can do this manually with a shovel or by renting an excavator. The depth of the trenches to be done will depend on the freezing line of the soil in a particular area. According to SNiP, the depth of installation of sewer pipes is 0.5 m less than the level of the mark of freezing soil. These parameters are approximately 3.5 meters for the northern regions of Russia. As for the middle lane, this indicator varies from 2.5 to 3 meters. On the Black Sea coast, it ranges from 1.25 to 2 m. The indicated figures are not categorical, they can be changed within certain limits. This will be affected by the terrain and the line of groundwater.
However, the laying of sewers should be carried out at a distance of 0.5 m from the surface of the earth, which is the minimum limit. If it is supposed to use pipes with a diameter of 110 millimeters in the work, then in the soil it is necessary to prepare indentations with a width of 0.6 m, while the depth should be 0.05 m more than the depth of the pipes.
Trench Requirements
Laying of the sewerage should be carried out only after the trench is dug. It has special requirements. The bottom should be leveled and a certain slope created, which should be equal to 2 centimeters per linear meter of the pipeline. Sewerage construction involves careful leveling and tamping of the soil. Next, a preparation of gravel and sand is laid, the thickness of which should be equal to 15 cm.
The pillow is necessarily sealed. The site should be located two meters from the viewing well. Among other things, when choosing a location, it is necessary to approach the interface between the pipeline and the inlet pipe. In those places where there will be bells in the sewer system, small pits should be made.
Pipe laying
After you know at what depth to dig the sewer pipe, you can perform all subsequent work. As soon as you reach the stage of laying the pipeline, you need to start the following manipulations. It is recommended to start from the foundation of the building. Pipes should be flared down into well-prepared trenches. To pair the two products, the bell of the first element and the smooth end of the other must be cleaned of dirt. The interface should be treated with special compounds. The pipe must be inserted into the socket. According to this technology, it is necessary to follow when the combination of the remaining elements of the system will occur. When mating parts of the pipeline, one product must be inserted into the socket of the next. In order for these interfaces to be reliable, it is necessary to measure the depth at which one pipe will go into another. The corresponding place will need to be noted.
If you know at what depth to dig the sewer pipe, this will greatly simplify the work. If there is a conclusion in the foundation of the building, the bell of the external sewage system must be brought to it. If not, then make a hole. When the faecal sewage system is equipped, it is recommended to use diamond drills that will do their job perfectly. In order to ensure rotation, it is necessary to apply special bends of 15, 30 or 45 degrees. If the sewer pipeline has a length that exceeds 15 meters, an audit should be installed in such areas.
Trench backfill
If you are interested in the question of at what depth to dig the sewer pipe, then you can read about it above. But after laying the products, it is necessary to analyze the angle of inclination. If all the manipulations were carried out correctly, then we can proceed to filling the system. To do this, it is recommended to apply the soil that was formed during the excavation of the trench, however, in this case, remove all large and sharp stones, as well as extraneous elements. Experts recommend breaking up sufficiently dense blocks that may be present in the ground so that they do not crush the product.