Underground tanks for water or other liquid are used not only at the industrial enterprises, but also in private house adjoining territories. In order that it is correct to equip object, it is necessary to know about the principles of its mounting, features of operation and service.
The underground tank is capacity which excludes impact from the outside on the liquid which is stored in it. Most often it is used for water storage, but in it there can be also other liquids – from combustible materials (oil products, oils), acids, to insecticides. Owners of tanks are obliged to provide their correct installation, absolute safety for the environment. All these factors depend on technology of mounting of the underground tank.
Device of underground tanks
The underground tank is the capacity placed in protection structure and driven in the earth. Capacity can be metal, plastic. The type of material is chosen in compliance with technical characteristics of liquid which will be stored in it. For service or potable water the capacity one-wall, for combustible and toxic liquids – double-walled is used. The tank can be cylindrical or squared.
Capacity has to be equipped
- entering and leaving openings,
- pump device and heat carrier,
- emergency output opening.
Controlling instruments are installed in underground tanks if that is demanded by technology of their operation and characteristic of liquid. The tank not just is located in ditch, and is protected by concrete or metal boxes.
Assignment of the underground tank
The tanks of any size located below ground level are considered as underground tanks. They are applied on
- Gas station and GZS,
- fire stations,
- territories of municipalities,
- industrial enterprises,
- house adjoining private territories.
The main assignment of the underground tank – liquid storage. Contents have to be hermetically closed that its couples did not get to the atmosphere if it is chemically dangerous substance. If water is stored in the tank, then the tightness provides preservation of its volume, economy of its expense.
Rules of mounting of the underground tank
The technology of mounting of the underground tank depends on its design, volume, type of material of which capacity, soil characteristics where it will be driven is made. Standard rules include the following requirements to mounting:
- indications of consistency of the soil on the site for installation of the underground tank – from 1.5 kg/cm2,
- hydraulic tests of capacity are carried out twice – before installation and after its end,
- the composition of the ground and nearby ground waters is more aggressive, the stronger have to be isolation,
- at the bottom of ditch have to be created "pillow" from sand not less than 30 cm thick,
- from above on the tank the protective layer of soil 20 cm thick is filled, spills water and is carefully rammed.
Important point - experts have to carry out the choice of type of capacity, development of technology of its installation. It is possible to construct such design the hands only in case water, for example, for personal needs is stored in the underground tank.