Calculation of stormwater

Sequence Design livnevki

1. livnevki Designing for a particular area, the development of pipeline layout and wells.This stage of the work carried out to meet the requirements set forth in the standard documentation -. SNIP, SanPin, GOST, etc.
2. Adoption of the draft in instances
3. required by law Construction of stormwater on

selected area is very important part of the project is the technical specification of the system, componenton the basis of GOST 19.201-78 and fulfill all the requirements for the planned scheme.This section contains not only a description of the destination facilities, as well as the features of construction, the timing of their implementation, the technical and economic calculations and so on.

to calculate the

system Calculation of stormwater provides for the definition of parameters:

1. Choosing the type of system - internal or external drainage
2. Definition wells location and the number of
3. Counting piping length
4. Choicebuilding materials required to construct

system The main factors affecting the calculations are the climatic characteristics of the region in which the site occupancy nearby reservoirs of any type, catchment area, the speed of movement of precipitation and more.

In order to predict the material costs for the construction of livnevki, you must make an estimate, which includes the price of all system components:

• Point catchment tanks
• gutters
• Stormwater wells
• Filters for sewage treatment

wells are a very important component of the system, as they are depending on the type of mission are varied - the collection and accumulation of precipitation, their distribution to the treatment facilities, diagnostic systems, erosion of sediment, as well as water sampling.

project stormwater includes the following sections:

1. tracing system
2. Hydraulic calculation network
3. Linking and design of its elements

Depth of the stormwater

Clearing depth, received at the network design, according toSNIP 2.04.03-85 depth is applied in the region.

When a small amount of design data the depth of laying the pipes taking the following:. With a diameter pipes up to 500 mm - 30 cm, with large diameters - more than 70 cm

optimum depth of laying pipes stormwater is such in which the volume of excavation is minimal, andalso ensured the integrity of the pipe, to avoid the freezing of communications and education in its ice.

minimum slope storm drains system is determined based on the type of surface coating, such as the diameter of the pipes and drainage.

Calculation of stormwater includes determining the slope on the following principle: if the internal pipe diameter of 200 mm, the value of the slope should be 0,007 or more, and with a diameter of 150 mm - more than 0,008.Under certain conditions, the value may be lower, respectively, to 0,005 and up to 0,007 for a given diameter.

For open gutters slope equals:

• channel to drain effluents - 0,003
• Tray road, which coating consists of asphalt concrete - 0,003
• Tray roads, packed with gravel or paving stones - 0,004
• tray, cover the cobblestones - 0,005
• the ditch, which has a separate location - 0,005

it can be concluded that the slope has proportionately on the roughness of the material - the larger it is, the greater the value of the slope.With a diameter of determination is different - with its increasing number of slope decreases.

With self-construction system drains the principle of providing the necessary slope is taken on the surface of the soil.other principles are applied to the finished gutters.

values, which are represented in the regulatory documents are empirically derived, that is, they are derived from data obtained from a large number of ready-made systems.Correctly carry out the design and calculation of the storm sewer system to get reliable and its service life will be long.