Precast concrete well - one of the mostpopular and sought-after products, which is famous for its long service life and high mechanical strength and reliability. This is the most optimal ratio of quality and price. Such concrete goods are built much easier and faster than other wells. The optimal installation time is considered to be early autumn, when the level of groundwater is lowest. Well reinforced concrete dimensions can be very different, depending on the size of the rings.
Design Features
The design of such wells is quite simple, but in their construction should take into account all the requirements of GOST and SNiP. These vertical hollow structures consist of:
- bottom part with a deaf bottom;
- wall well rings with a diameter of 1000-1500 mm (they select the desired depth);
- special rings with a diameter of 600 mm, which regulate the height of the well and are placed in the neck;
- cover installed on the hatch.
As a rule, prefabricated concrete wells are almost or completely immersed in the soil and are located below or above the groundwater level.
During installation, concrete is poured at the bottom to form a cradle.
Reinforced concrete rings for a well
These concrete products form the neck of the well.Rings are a crate made of metal reinforcement and covered with concrete on top. Products are manufactured according to GOST 8020-90 by vibrocompression of heavy concrete, which results in an exact size and high density of the walls. Used for the formation and laying of reinforced concrete wells.
Concrete cover
This element of reinforced concrete wellsmade of high strength concrete. It is used as a slab at the completion of the installation of well rings. The lids are round and have a hole at the top on which the hatch rests. This structural element prevents the ingestion of foreign objects and protects against contamination. The cover for a well is made of heavy concrete and without fittings at the expense of which the increased durability and reliability is provided.
Bottom for well
This is an important and necessary element for the national teams.wells, which is a monolithic reinforced concrete slab round shape. The bottom of the first lowered into the well shaft. On top of it are attached the rings of the well and the cover with the hatch. It is on how well it is made and properly installed that the efficiency of the use of the well depends.
Types and purpose of wells
The purpose of ZhB-wells are divided into several types:
- Sewer (sewage, drainage). Designed to create a sewage system in places of pipe drops, cornering, etc.
- Plumbing. Serve as elements of heat and water supply, water supply network.
- Gas pipelines. They are elements of trunk gas pipelines.
In terms of functionality, a reinforced concrete well can be:
- Lookout. Serves to monitor the operation of the entire system.
- Delta. It is used when turning the network, in places where there are strong pipe drops, when combining pipelines of different depths into one network, etc.
- Swivel. It is applied in the place of pipe rotation in order to prevent clogging. In addition, it is often used as a lookout.
- Filtration (filtering). Required for wastewater treatment. Reinforced concrete well is installed above the groundwater level.
- Cumulative. It is used for accumulation of sewage and is most often installed at the lowest point of the site in order to ensure the optimum angle of inclination of the sewer pipeline.
The advantages of reinforced concrete
- Durability of concrete goods. Reinforced concrete allows you to withstand the loads that arise as a result of the pressure of the soil, and thanks to its dense structure, it is not washed away by groundwater.
- Reinforced concrete well can be equipped in any soil.
- The walls of the inner surface of wells can be easily cleaned without the use of special equipment and qualified specialists.
- Long service life even when operating in areas with high humidity and corrosive environments.
- Ease and simplicity of installation and carrying out repair.
- Concrete is inert, due to what has no effect on water quality when using it for a key well.
- Low cost of reinforced concrete wells. Its construction and further operation requires minimal costs.
Mounting Features
The process of assembling reinforced concrete wells is carried out in several stages:
- First of all, you need to clearly definea place where the well will be built. It should not be installed on the slopes of ravines, beams, river banks, because then they will take groundwater. In addition, an important negative factor is the contamination of groundwater with various chemical fertilizers that are used in the adjacent areas and enter the soil through emissions and effluent production.
- After choosing a place, they begin to perform work onpunching directly the very barrel of the well (mine). This process is rather laborious and largely depends on the depth of the soil and the aquiferous layer. The use of modern technology allows drilling very quickly.
- Incoming water is pumped out.
- The filling and tamping of filter layers is carried out. Then the first ring is carefully installed. It is the correctness of its installation depends on the vertical mine.
- For mounting the rings, as a rule, they use lifting equipment or special devices installed directly above the shaft shaft.
- After each installation of the ring, fasteners are made of metal brackets, which are subsequently used as ladders for work in the well.
- The joints between the rings are sealed, and the free space between the walls of the concrete rings is covered with soil and carefully tamped.
- The hatch is filled with clay, ventilation is installed, and the neck is closed with a lid.
Reinforced concrete wells have repeatedly proved the reliability of protection of pipelines from various kinds of damage through the use of quality materials, strength, ease of installation.
Sizes and price
The size of the rings depends on the type of well. Today’s construction market offers the following products:
- diameter - within 70-250 cm.
- average height - 50 cm (there are products up to 3 m)
For small wells in private construction used rings of small size. The most popular are:
- KS-7-1. The inner diameter of this product is 70 cm, wall height 10 cm, width - 8 cm, weight - 46 kg.
- KS-7-10. This is a universal product, whose height is 1 m, weight - 457 kg.
The price of concrete rings depends on their size. Larger products are more expensive.
For example, small KS-7-1 cost on average 340rub. for a unit. The cost of KS-7-5 and KS-7-6 - 900-920 rubles. The price of universal brands KS-7-10 is about 1,500 rubles. The largest rings will cost about 5,000 rubles.
