Build Daily

Engineering Systems

August 12, 2017 18:08

The slope of sewage - warn blockages even in the construction phase

Slope sewage - the essence and importance of this parameter

main requirement is reminiscent of important nuances of any sewer - mandatory height difference of the beginning of the pipe and its output end.The received amount of such a drop is typically a half to two centimeters on each meter of length of the horizontal section.It is understood that the change of the calculated parameter is usually not permitted in the system.

As already mentioned, Samotechny arranged with a certain height difference of the receiving and discharge ends of the drainage area, called gradient system.Given the difference between the velocity of the liquid and solid waste fragments to reliably remove the latter may require a definite amount of liquid.

Optimum laying sewerage and should provide the most efficient flow of straight sections with acceptable water consumption.As with a small decrease, and when too large, it is possible clogging of the pipes, why then we are waiting for further work to address these failures.

Norma sewer slope - do everything in science

Existing rules sewer devices and water pipes (SNIP 2.04.01-85), one of the benchmarks for similar wastewater determine the minimum velocity of the fluid through the pipes - 0.7 meters per second.An important factor influencing the character of the whole system is the level of occupancy of the pipes.It is evident that to a certain value, this factor will also affect the permeability of the waste mass.

Accepted content is not less than thirty per cent of the pipes.Thus, calculation sewer slope is performed taking into account these parameters, ie,fluid velocity and filling pipes.In addition, the value may vary depending on the materials and manufacturing system elements of their diameters.

Influence of materials is taken into account by the factors given in the above mentioned standards.It is determined by the product of the above parameters - the velocity of the fluid in the system and its completion.Multiply the first by the square root values ​​of the latter allows you to find the coefficient.

And then, depending on its value, is determined for different materials sewage angle.For tubes of plastic or glass tilt condition for the application rates indicated above is the coefficient of 0.5 and above.For tubes of other materials, it begins to 0.6.

Sewerage tilt - how to calculate it without tables?

existing norms stipulate the maximum standard deviation and sanitation.Its value should not be greater than 0.15.This restriction is not essential, if a branch of the terminal devices (toilets, traps, etc.) have a length of no more than one and a half meters.

In the case of a possible lack of information to identify all of the above parameters necessary for the calculation, the rules allow for reducing the height of the average values ​​depending on the diameter of the pipe.These biases may be used when there is insufficient flow of wastewater.

So, this quantity will be 3 cm to 1 m length of pipe diameter and forty to fifty millimeters.Pipes with diameter up to 100 mm height reduction is determined by the rate of two centimeters per meter length of the section.

Based on the foregoing, gravity sewer slope must be determined in each area of ​​the entire system within the parameters of the elements of this area: the length, diameter and pipe materials, the amount of waste water, etc.Calculation usually be carried out with a small margin.The accuracy of the calculations should be supplemented by their observance during the installation, which ultimately will provide the guaranteed quality of the system.