Caisson - what is it? Caisson for a well

If you decide to install a caisson, what is it, it is important to find out. Initially, this element was used for underwater work, it looked like a chamber that had a square or circular shape. The main feature was the quality of waterproofness.

Description of the caisson

In order to achieve a permanent operation of the system, it is necessary to take into account the peculiarities of the climate and to think through all the details. When the temperature of the external environment drops below zero, water has the ability to freeze. Underground horizons are located below the freezing level, while the pumping equipment is located on the surface, this indicates that the liquid will freeze at the first freezing. This will cause the pump to immediately become unusable, the pipes will rupture and the system will fail. The caisson will help to eliminate these problems. What is it, you can learn by reading this article.

The said well element is a large thermally insulated container, which is provided with a cover. The latter is also insulated. Inside is the necessary equipment. Among other things, inside it is possible to install a pump, as well as stop valves, automatics, filters, expansion tank and measuring instruments. To deprive a caisson well it is possible only when it is located close to a heated building or any similar structure. This option is more convenient, because in this case you will have access to all the nodes of the system. However, this technology has its drawbacks. They consist that the equipment assumes necessity of presence of enough big free space, the second lack consists in enough noisy work of the equipment.

Description of the caisson

If you decide to choose a plastic caisson, what it is, you can find out below. Such structures may have a rectangular, square or circular shape. They found the greatest distribution among consumers. This is due to low price, low weight, long life, excellent thermal insulation properties, as well as waterproofing. If to compare cost, plastic analogues cost much less in comparison with ferro-concrete and steel. Minor weight makes it easier to carry out loading and unloading operations, as well as manipulation of installation. The plastic is completely non-corrosive, and does not require additional insulation. The temperature inside the tank always remains within +5 degrees, which eliminates the freezing of water. If you decide to choose a plastic caisson, what is it, it is important to know. It is necessary to take into account some drawbacks of such constructions. They are expressed in insufficient rigidity, this can cause a change in the linear dimensions of the container, followed by equipment failure. To solve this problem it is possible simply enough, for this purpose it will be necessary to carry out backfilling on a perimeter with the help of cement mortar, it is enough to provide a layer with a thickness of 80 millimeters.

Metal caisson

You can make a steel caisson with your own hands. However, such variants are also sold in the stores of the corresponding goods. Outside, the structure will need to be treated with an anticorrosive compound, and the material can be a metal whose thickness is 4 millimeters. Quite often the finished models are made of stainless steel, this guarantees a long life. However, it is necessary to take into account that a caisson of this type will cost more than analogues.

Caisson of reinforced concrete rings

You can be installed a caisson, made of reinforced concrete rings. Similar products have recently been used less and less, this is explained by the high cost, heavy weight and poor waterproofing. A significant amount complicates the transportation process, and also involves the need for leasing of lifting equipment, which entails additional costs. As for poor waterproofing, then due to the hygroscopicity of the material, you will have to take measures to isolate the rings. In severe frosts, the water in the pump and the stop valves can freeze. Thus, the reinforced concrete caisson does not always fulfill its basic function. Among other things, it exerts an impressive load on the ground, over the years the construction sags, which contributes to the deformation of the pipeline system.

Installation of the caisson

If you will be installing the caisson, then you must follow certain rules. As for the steel structure, the work must begin with the preparation of the excavation. It is important to take into account that its diameter should be slightly larger than the caisson itself - by 30 cm. The depth should be calculated in such a way that the neck of the tank is 15 cm above the ground. This will prevent the ingress of surface waters that form during the thawing Snow and in the period of precipitation. The next step is to make a hole for the casing, which will be located in the bottom. It can be oriented in the central part or displaced in any direction. The caisson plastic is installed on the same principle. In the next step, the sleeve must be welded to the hole from the pipe, the diameter of which should be greater than the diameter of the casing. The length of the sleeve can vary from 10 to 15 cm. It is necessary to make sure that the sleeve is easily put on the pipe.

Conclusion

If you yourself install a caisson for a well, then it can accommodate a membrane tank. It is necessary to mount it in such a way that the neck of the casing moves to the side of the vessel wall. This will allow you to locate the tank without restricting access to the well. After you have learned what a caisson is for a well, you can purchase equipment and think about installing it. It is important to provide the caisson with all the necessary qualities, among which heat insulation and protection from impurities. Only in this case you will be supplied with clean water all year round, which will not freeze even in the harshest winters.