Caisson - what it is, features, types, device and reviews
Quite a laborious and responsible process is the drilling of a well for water supply. Implementing an idea is usually quite expensive. It is possible to justify the invested forces and means by effective and reliable operation of the water source.
For this, it is necessary to equip it with modern devices and take care that it is not adversely affected by external factors. An excellent helper in this case is the caisson, what it is, you can find out if you read the information below.
Description of the caisson
The caisson is an airtight container, buried in the soil and strengthened on the casing. In the zone where the soil freezes through, this part protects the well from the effects of low temperatures and prevents contaminated water from entering the barrel.
In the caisson is placed equipment by type:
- pressure sensors.
The caisson has a rather impressive volume, which simplifies the maintenance of the water source and the repair work. If you decide to do the assembly of the caisson, what it is, you should know first. Work on the device are not tricky. At the bottom of the node there is a hole for the casing, and for connecting water pipes and conducting cables on the side walls there are corresponding inputs.
Inside there is usually a staircase that provides quick access to the equipment. In the absence of it in specialized stores you can buy a folding option. The upper part is sealed with a lid.
Main types and their features
If you need a caisson, what it is, you must first learn. This part of the well is classified by volume, shape, and material at the base. The form can be any, but there are products on sale, in the cross section of which there is a square, circle or rectangle. The volume can vary in a wide range, but the most popular is the indicator from 1100 to 6500 l. When selecting this option, the location of the tank and the need for placement inside the relevant equipment should be taken into account.
It should be noted that with an increase in the volume of the tank, more funds will be needed for insulation and installation. If you decide to buy a caisson, what it is, you should ask. The main criterion for distinguishing this part of the well is the production material. Among the main should be highlighted:
Reviews of the main types of caissons
Manufacture of caisson may involve the use of plastic. Such options, according to consumers, are the best solution in terms of quality and cost. Among the main advantages should be highlighted:
- corrosion resistance;
- small weight;
- high degree of resistance to moisture;
- no need for additional waterproofing;
- democratic cost.
Plastic caissons, according to users, have their drawbacks. One of them is expressed in the fact that the products have low rigidity. Even if the wall thickness reaches 4 cm, it can deform under the weight of the soil and damage the equipment inside.
Opinions on alternatives
Metal caisson for a well is most often represented by aluminum variants.Such containers, according to home craftsmen, can be made independently or purchased in a finished form. It is based on 5 mm metal. The advantages of the metal caisson for the well are:
- stability in the ground;
- long service life;
- excellent strength performance;
- high degree of tightness.
However, metal tanks have their drawbacks, they are expressed in an impressive weight and the need to apply an anti-corrosion composition. Concrete caisson, according to consumers, is characterized by high cost, impressive weight, hygroscopicity of the material and high heat loss. Production of caissons may involve self-pouring formwork, this is an advantage. In a simplified form, the structure is a product poured from concrete.
If you want to use a brick, you can count on a number of advantages by type:
- resistance to low temperatures;
- high strength and ability to retain heat.
However, laying a caisson of brick has its drawbacks, they consist in the need for waterproofing works and the complexity of the process.
To install the caisson, a pit is dug around the well, its depth is 2 m. Its dimensions should be greater than the dimensions of the container by 10 cm around the perimeter. The pit is prepared taking into account that the neck of the structure is located 10 cm above the surface. This will exclude ingress of rainwater and surface water.
Then you can proceed to installation. At the bottom is indicated the place where the hole for the casing will be located. It can be shifted in any direction, taking into account personal requirements. If the accumulator is located in the caisson, the hole for the pipe should be shifted from the center. This is necessary so that after the installation of the pressure tank, it is possible to lower the tool into the hatch. Hydraulic and cable outputs should go to the place of entry of the pipeline into the building.
Method of work
In the hole prepared at the previous stage, it is necessary to weld the sleeve of a more impressive diameter compared to the pipe. The length of the latter should be 15 cm. Before this, a sleeve is put on the pipe to make sure that you can provide a small supply.
The pipe is cut at a height of 500 mm from the bottom.Caisson is prepared in advance. Bochata are welded into its walls to bring the pipes into the trench. One of them is designed for cable entry, while the others are for pipe output. The caisson is installed above the pit so that the axes of the liner and casing coincide.
The design is located on the bars, which will have to pull out and lower the product into the pit by a pipe. The latter will act as a guide. The caisson must be set horizontally, for this, parallel bars are located between the walls of the pit and the tank. The sleeve along the perimeter is welded to the pipe, and then pipes are pushed inside through the installed nipples.
Welding joints must be treated with a primer. If you use a PND 40 pipe in operation, then a 1.5-inch nipple is required. When the PND 32 pipe is involved, the nipple diameter will be 1.25 inches.
If the pipes pass with difficulty, the inner surface of the nipple should be filed. Inside the pipe is sealed by a transition with internal thread. To power the pump through one of the pipes, you must pass the electrical cable. This will provide a sealed design that will protect the wellhead.In order to achieve better results, you need to install a second foam cap and plywood. It is removed from the first one by 50 cm. The upper part of the structure is additionally insulated.
Caisson cellar and its cost
If you are engaged in arrangement of the summer cottage and a house in the country, then you may be interested in the price of a plastic caisson for a cellar. Choosing the manufacturer "Titan", you can purchase one of the many varieties of such containers. The cost will depend on the size and volume.
If the last parameter of the plastic caisson is limited to 2.5 m3, then you can purchase a caisson for 79,000 rubles. Its size is as follows: 1200 x 1200 x 1750 mm. When the volume increases to 8 m3, and the dimensions are 2000 x 2000 x 2000 mm, you will have to pay 156,900 rubles. The most voluminous plastic caisson is the one whose dimensions are 6000 x 2000 x 2000 mm. 24 m product3will cost 399,000 rubles. Installation is paid additionally. The installation will cost 35,000 rubles. minimum.
In conclusion: the cost of the capacity for the well
The price of plastic caissons for wells will vary depending on the size of the structure.By purchasing the capacity of the brand "Titan P 960", you will have to pay 28 300 rubles. The dimensions will be equal to 960 x 2000 mm.
If you want to install a caisson of more impressive volume, then you should choose RODLEX-KS, which costs 39,000 rubles. Its dimensions are 1360 x 2000 mm. The cost of installation is approximately equal to the price of the caisson itself. To pay for the installation of a smaller container will have 20 000 rubles.