Construction of the foundation drainage system

Features drainage device under the slab foundation slab

(melkozaglublennym) foundation called the construction of monolithic slabs located under the entire area of ​​the house.It is used for buildings of a small area, as tends to give unwanted shrinkage.And it is because of such structural features of the drainage system is best equipped to start construction.

step by step is as follows:

• Under the foundation is dug a trench in which to the greatest possible depth, drainage wells are drilled.It is necessary to take into account such a time as the freezing of the soil in the winter, so the end of the hole should be located below this level.
• Next to having a well placed drainage tube, the distance between them should be within 3 m;
• All the rest of the space is filled with large rubble or gravel;
• gravel layer on top poured layer of concrete, which after solidification dig a trench on the outside of the building and covered it with gravel;
• final stage - the construction of the blind area of ​​about 1 m wide.

This method will provide maximum drainage and is the most effective in this case.However, if the house is already built, and there is no drainage, you can use an alternative method of its arrangement.

To do this around the perimeter of construction dig ditch sufficient width and depth, the bottom of which is littered with rubble layer of 10 cm in height.After careful compaction, form the slope is 5 cm for every 10 tubes with a smaller slope possible water retention and the formation of puddles.Drainage pipes stacked and combined in a single structure, the end of which goes into a collecting drain well.

However, before proceeding with work on the improvement of plate the basement sewage, must be provided, and to take note of these points:

• depth freezing of the soil at the lowest possible temperature;
• composition of the soil (clay, sand, etc.)
• depth of the foundation and its location relative to the underground ducts;
• frequency and intensity of rainfall in the region.

Drainage melkozaglublennogo tape and columnar foundation

To ensure drainage belt or columnar foundation perform the following activities:

• The entire perimeter of the house dig a trench whose depth is greater than the depth of the foundation and slope equal to 5-9 degrees;
• At the bottom of the pit is laid broken brick or large rubble;
• Above them lay special drainage pipes connected into a single system, which is installed at the end of a well for water drainage;
• Then the entire structure is covered by geotextile fiber;
• top of it is filled with another layer of gravel and made the strengthening of the branches whose function - to strengthen the main overlap in the form of soil;

pipes for drainage

Manufacturers of building materials provide a large enough range of ready sewage and drainage pipes.The distinctive feature of these products is the presence of the entire length of the tube of small diameter holes of 5 mm for water drainage.The diameter of the pipe varies between 110 mm.

most popular are plastic tubes, thanks to its exceptional durability and operational qualities:

• rigidity of products ensures their high durability;
• corrosion resistance and resistance to chemical agents;
• Thanks to the smooth inner surface, the walls are not formed coating that would impede water flow path;
• acceptable cost;

Visually appreciate the simplicity slab foundation drainage device by viewing the video.