Storm sewage : design , calculation , installation

The classification systems for collecting and effective diversion of rainwater are the characteristics of their designs, of which there are three basic types that have received the most widespread in all areas of construction:

1. - open, implying the timelyand effective removal of water from precipitation on a specially-equipped system of concave troughs, ditches special design of open drainage channels and properly equipped issues;
2. - closed when the collected rainwater drainage trays initially falls into the wells, rain receivers, connected with underground pipelines, sometimes fitted with its own purification systems;
3. - mixed, in which the individual elements are used both open and closed systems dozhdeotvedeniya.

In some cases, developing are rainwater drainage directing water flow to the existing drainage system near the house.However, experts such decisions are strongly encouraged, since excess amount of water in the drainage system can be disastrous impact on the technical condition of the building foundation.

Mounting elements stormwater.

Laying livnevki traditionally produced in parallel drainage system, subject to the same technical specifications (the angle of inclination is at least 5 mm per 1 meter dozhdeprovoda).For sufficiently deep foundation drains storm sewers can be laid on top of them with advanced rammer to the ground as possible dense state that allows you to protect the pipe from damage.

As in drainage, storm water pipes stacked on consisting of rubble or sand cushion height from 5 to 10 cm. The most common material for pipe storm sewer is impervious even to prolonged exposure to water high strength polypropylene.In addition, for increasing the strength of the outer surface of corrugated pipes is performed, and the inside - a perfectly smooth to reduce friction.As a connector for coupling the double pipes are used in order to increase the tightness provided with elastic rubber seals.

Directly under the drain pipe, even on the level of its outlet slice mounted receiving cone-funnel for water.This funnel is further assigned the role of a filter, guaranteed delaying a come together with water from the roof of tree branches, leaves and other debris larger size.Further along the inclined pipe system collected from the allotted area rain water should be to the well to collect rainwater, or immediately connected to a common manifold, or the system of sewer pipes.

In case of severe flooding or loss after excessive rainfall, in which livnevki can not cope, there is the risk of rainwater into the drainage system and to the building foundation.To like this has happened, the well connection livnevki and drainage pipes equipped with reliable, but structurally simple check valve.The lower part of the check valve is always at least 12 cm from the tray release rainwater.The upper part of the well is usually supplied in addition sleeve through which at such needs can be connected drainpipe in the case of such a need.

fully assembled the lower part of the system of rain sewage, which consists of collecting the water from the mouth of the cover, outlet extension pipe and the well itself, sufficient backfilled with sand or medium-sized rubble, which is then thoroughly compacted.

Exit rain collector is either a high-performance centralized sewage system, or at some distance from the building into the ground or an open turf for subsequent absorption by soil.In the latter cases to split the water flow using a mound of rubble.Moreover, in these cases the outlet pipe is provided with a simple but reliable protective grid preventing the spread of a small animal.

problems solved in the design of systems, storm-water systems.

Without effective removal of rainwater is impossible the existence of any major cities or compact cottage settlements.However, the volume of water withdrawn in each case are completely different, so the arrangement of storm-water systems always begin with a thorough calculation.These calculations include the following activities:

• - tracing;
• - design development of basic components and elements;
• - hydraulic calculations.

Despite the apparent complexity of these calculations, to perform such an individual house and quite possibly yourself.To do this, you must relate the catchment area, the terrain, the probability of possible contamination, the length and diameter of the conduits, as well as the estimated amount of precipitation in view of climatic features in the locality.

Tracing involves planning the placement of nodes and elements of a rain drain system in such a way that the water was able to flow freely by gravity on the most meek and free way.To do this, all the catchment area is divided into several pools, each of which in the overall scheme provides a private collector connected to the sewer system of sufficient capacity.

Also read about the installation of storm sewer.