Overview of plastic drainage wells

For high-quality drainage of water from the ground, it is necessary to install a drainage system. The structure works by gravity, providing an optimal level of dryness / moisture content of the soil. The KDN plastic drainage well is used as the main element of the drainage system. The polymer construction has shown itself to be the best, even under the condition of many years of operation. As a result of high-quality drained soil, stone buildings on the site remain durable, it becomes possible to carry out construction work, as well as planting various vegetable / fruit crops in the soil and obtaining a further harvest.

Types and arrangement of plastic wells for drainage

Plastic inspection CDNs for drainage are divided into groups by purpose:

• Revision, he is viewing / inspection. Designed to control the water level in the ground and the degree of clogging of the system.
• Turning. It is installed in places of sharp bends of the drainage structure at an angle of more than 30 degrees.
• Linear. A well designed for installation on long straight lines of the system. The minimum distance from one to another straight element is 40-50 m.
• Differential. It is used for installation in very uneven areas, when the drainage pipes have a significant difference in height. That is, they are located at different depths.
• Accumulative, it is also collector. Works as a reservoir for the accumulation of ground / storm water. The storage block is mounted in the lowest and dead-end part of the drainage system. The water collected from the site can be used for household purposes (watering, irrigation).
• Filtering, it is also absorbing. This is a well that does not have a sealed bottom. Instead, a pillow of sand and gravel is poured to filter the waters and send them further into the ground. As a result, the accumulated moisture goes into the soil at the lowest point of the site. Such wells can only be used with small volumes of groundwater - up to 1 cubic meter per 24 hours.

The drainage system must be installed at a slope so that the groundwater leaves the site by gravity. Pipes are laid below the level of soil freezing. The slope is made at the rate of 5-7 mm per 1 running meter of the system. If, for technical reasons or in connection with the relief of the site, the installation of the slope structure is not possible, the collector tank is equipped with a pump for forced movement of water.

All the main elements of the drainage system are classified according to the material of manufacture. Wells are made from the following types of plastic:

• PP (polypropylene). Strong, durable material. It becomes extremely fragile and even undergoes deformation at prolonged subzero temperatures in combination with mechanical stress.
• PVC (polyvinyl chloride). It is considered the most durable material for the production of wells. Inert to aggressive media that are present in excess in ground / rainwater. Often, PVC tanks are even used to install drainage systems in industrial plants.
• PE (polyethylene). Ideal material for the installation of a drainage system on moving ground. It is able to freeze at subzero temperatures and return to its usual state at moments of thaw without loss of elasticity.

When choosing a polymer well for a drainage system, it is worth relying on temperature indicators in the region and on the type of soil on the site.

The device of the drainage system and polymer wells:

• perforated pipes located throughout the site and brought to the revisions;
• the well itself, having a cone-shaped top with a hatch, a corrugated "body" sealed or with pipes for entering pipes, a polymer bottom or a tray for arranging a sand-crushed stone cushion.

It is possible to purchase plastic drainage CDNs as a complete set or as separate elements.

Advantages and disadvantages

The main advantages of polymer drainage wells are as follows:

• light weight, which allows you to easily mount the entire system, even alone without the involvement of special equipment;
• corrugated surface acting as stiffeners;
• inertness to aggressive media and anti-corrosion properties;
• rated load up to 80-90 tons;
• long service life, reaching 50-70 years;
• the possibility of using pipes as reservoirs for an autonomous septic tank.

As for the shortcomings, strict adherence to the rules for installing the system can be considered a relative disadvantage. Otherwise, the well will eventually deform under the influence of soil layers.

Installation technology

In order for the drainage system to work without failures, it is important to strictly observe all stages of its installation. They act in the following sequence:

1. On the site, in accordance with the project, trenches are being dug for laying drainage perforated pipes. Be sure to make a given slope within 5-7 mm / running meter. The bottom of the trenches is covered with a 5 cm high sand cushion.
2. Pits are arranged under the wells. The depth of each should be equal to the height of the polymer viewing / turning / storage corrugated pipe plus 20 cm per cement pad.
3. The bottom of the finished pit is covered with a layer of sand 5-7 cm, and then a layer of concrete mortar is poured on top. Its thickness is 10-15 cm.
4. A well is installed on the finished solidified base, having previously formed holes in it for pipes. These places are equipped with special seals.
5. The pipes of the drainage system are brought to the nozzles. All joints are thoroughly coated with sealant.
6. The walls around the installed well are covered with a mixture of crushed stone and sand in a ratio of 1/1. The mass is moderately tamped when backfilling. This will fix the tank in the ground.
7. The top of the revision is covered with a hatch.

If the cover of the well will be located at ground level, you can equip it with some kind of identification mark, so that later it would be easy to navigate the site and find it.

The cost of plastic drainage wells

The prices of plastic filter wells for drainage vary depending on the section of the pipe and its length:

The maximum diameter of the well can be up to 1 meter. Its largest length is 6 m.

In order to acquire CDP of the required length, it is important to know the groundwater level at the site. To do this, conduct geodetic surveys or simply find out information using the method of home drilling.