Depth tab of sewer pipes

Influencing factors at a distance of occurrence of sewer pipes

When calculating the depth of the sewer must take into account the following parameters:

• Technical specification of the materials used in the construction;
• Features specifics of the material used;
• terrain on which are working;
• Climate mark, regulated by normative act SNIP 2.01.01.82, which displays the annual capacity of soil freezing;
• When laying under the roads, it is necessary to take into account the maximum dynamic load.

soil freezing

the regional average freezing is no more than (m):

• loam, clay - 1.5;
• silt and fine sand - 1.9;
• Sands of large and medium size - 2;
• Large - clastic soils - 2,3;

on this, starting the sewage system design, determine the distance at which the soil freezes, which will be laying system.
mark of soil freezing is the maximum depth of the soil below the level of liquid in the soil which does not crystallize, the measurement is carried out in standard units.

below the level of freezing of the soil volume is not increased as a result of soil freezing.Hence there will be no material impact on the system.To clarify the freezing level, may contact the local metrological service, in which you can find figures on the basis of long-term studies of soil properties.

When taking into account peculiarities of the construction of sewage communications, there are some differences from the water supply.Depth bookmark sewer pipes are not calculated complex arithmetic calculation.Wastewater is transported waste zero temperature, so the value of the soil freezing mark subtract a certain value, which reduces the depth of the sewer pipe.The amount depends on the diameter Photo:

• Using waste pipes with a diameter greater than 0.5 m, this value is 0.5 m depth of soil freezing example is 1.8 m, depth bookmarks sewer pipe will be 1.3 m (1.8.- 0.5 = 1.3 m);
• If pipe diameter of less than 0.5 m value will be 0.3 m Example parameters of the same construction, but with a pipe diameter of 0.4 m, the depth to which it is necessary to lay the pipe will be 1.5 m (1.8 -. 03 = 1.5 m).

After step calculation, you need to dig a trench, which will be laying communications.In order to save when the excavation, the trench must be done the most narrow.It is strictly prohibited to decrease the depth of bookmarks sewer.

terrain and its features

features of the terrain on which you are working, will affect the level of occurrence of sewage drainage.The construction of the sewerage system in the relatively flat land provides a relatively uniform depth bookmarks sewer pipeline along its entire length.

If work on the occasion of the site with large differences in height, depth bookmarks sewer measured from the lowest point of the site.When working on uneven ground will be more appropriate to direct the construction of the pipeline at a constant depth with a certain bias.

When laying a sewerage system in place movement of people and vehicles, it is necessary to take into account the dynamic load on the polymer sewer.In such cases, the tab must prodelyvat reinforced polymer using corrugated channels or closed method.

Sewer pipes and their technical characteristics

Plastic pipes - more modern than metal and ceramic pipes.This product has several advantages:

• durability;
• Ease of installation;
• acceptable cost;
• Easy transportation and more.

is necessary to take into account the lack of which is available for this product, it is the depth of laying sewer pipe in the ground is limited.And in order to avoid unforeseen circumstances should be carefully considered technical parameters that are declared by the manufacturer.

strength calculations are carried out by the joint venture 40-120-2000, in this document sets out the principle of regulation and installation of plastic sewer pipes.

studying technical performance materials from polymers, particular attention should be paid to the level of bookmarks, so that it complied with all conditions of the project.If we ignore these parameters, the system can not withstand the pressure, which is created by the ground, and will be damaged.That would entail the dismantling of the old pipeline and lay the new.

Some aspects

depth laying sewer pipe - a relative value, which must be adjusted at the same time taking into account the terrain, length of piping and structural features.

in gravity sewer systems must be respected drain bias to the treatment plant at the rate of 2 cm (0.02 m) per meter (ie, long-drain depth of 15 m point of the pipe connection and septic tank will be 30 cm (0.3m) deep).

level laying sewer system will provide an effective and long-lasting operation, if the calculations are made qualified.Also, knowing the figures, there is a possibility of optimal pipeline, which will reduce costs.