Plastic inserts in concrete rings

Structural features of sewer wells

Regardless of the type of well - concrete, plastic or brick, they are united by a single design scheme. It is a cylindrical or rectangular shaft, in which there is a tray for waste liquid at the bottom. It can have different branches, bends and holes intended for pipes (inlet and outlet). The ceiling with the hatch may also be different.

When arranging an external drainage network with the installation of a sewer well for various purposes, you must adhere to the requirements prescribed in SNiP 2.04.03-85.

Sewage wells can be serviced (their diameter reaches 1000 millimeters) or unserviced (then this parameter is smaller).
Until recently, the latter objects were almost never installed. Regardless of whether the wells are concrete or plastic, they are classified according to their purpose:

• viewing – linear, control, nodal, rotary;
• variable.

Inspection wells are used in the following cases:

• in places where branches are connected;
• when there is a need to turn the sewer line;
• when changing pipe diameter or degree of slope.

It is important to choose the correct distance between sewer inspection wells, which may depend on many factors.
Drop wells are installed in areas where there is a difference between the levels of incoming and outgoing pipes. They are also used when the speed of water flow changes or at intersections with underground objects.

The requirements for the location interval of control structures require the implementation of large volumes of construction work - excavation and installation. If you use plastic sewer rings for wells (such as in the photo), then you can significantly reduce labor costs and the time required to complete the work.

Which is better: plastic or concrete rings

Until relatively recently, when constructing a sewer system, there was no alternative to concrete rings and brick structures.
In addition, the use of other materials was not permitted by building standards and regulations. The advantage of concrete products is as follows:

• low cost;
• the ability to build a sewer well of the required depth;
• modularity of ring sizes.

But the disadvantages of concrete products are more significant. The fact is that it is impossible to determine in advance at what angle the rings will enter the well, so manufacturers very rarely produce products with pre-made holes. When installing a reinforced concrete sewer well, installers must first pierce the concrete in certain places, and then seal these holes hermetically after laying the pipes. For a similar reason, the tray at the base is made by hand from mortar.

It should be noted that PVC sewer rings do not have the disadvantages inherent in a concrete structure; all this is provided for in them in advance. One of the advantages of plastic products is that their shaped parts can easily withstand high temperatures and large volumes of liquid waste.

In addition, plastic sewer rings have much less weight compared to concrete products. To install reinforced concrete products, it is necessary to use lifting mechanisms. At the same time, polymer rings can be transported by passenger vehicles and installed with your own hands without the use of special equipment.

The use of concrete products in the construction of sewer systems does not provide the necessary tightness, as a result of which wastewater can penetrate into the soil. If there is a need to raise the level in order to lay a new asphalt surface, the work process will be significantly more complicated.

Plastic rings of the ECOSIS series for wells

LLC PC "Ecosystems" offers rings for wells made of spiral pipe. Standard dimensions: internal diameter 800, 900 mm, wall thickness 19 mm, length 1500 mm.

Construction of new wells.

Before starting the construction of a well, it is necessary to carry out hydrogeological exploration of your site, after which a conclusion is issued on the presence and depth of the aquifer, as well as the composition and complexity of the soil. Based on the data obtained, the method of installing the future well (open or closed) will be determined.

Open method, used in dense clay soils .

First, a shaft is dug with a diameter larger than the diameter of the ring. Then a cushion of crushed stone is poured onto the bottom of the shaft, rings made of a spiral pipe are installed and twisted onto it. If a hermetically sealed connection is required, then after twisting the seam can be welded with an extruder or covered with heat-shrinkable tape. The free space between the rings and the edge of the shaft is filled with crushed stone, screenings or sand. An internal filter made of sand and crushed stone is poured into the bottom of the well. After the well is ready, it can be covered with a plastic cover or a decorative house.

Closed method, used in loose soils.

First, a shaft is dug up to 1 meter deep and wider than the diameter of the ring, an ECOSIS ring is installed, then the soil underneath is removed. The ring is lowered below ground level, after which the next ring is screwed in. It is worth noting that at great depths, difficulties may arise using this method and ECOSIS rings due to the low weight of the ring. After the well is built, a filter of sand and crushed stone is poured into the bottom, and an ECOSIS cover or decorative house is installed.

Restoration (rehabilitation) and deepening of old wells.

During the operation of wooden wells or reinforced concrete rings, you are faced with such factors as odorous water in the well, movement of the rings, leaks in the seams, rusty water. Such a well is no longer suitable for further use. The way out of this situation is to make repairs using ECOSIS plastic rings. To do this, water is pumped out from the old well and the old bottom filter is removed. If necessary, the well can be deepened. After this, pre-screwed ECOSIS-850 or ECOSIS-950 rings are released into the shaft of the old well. The free space between the new and old rings is filled with backfill (sand-cement mixture 1:5), fine crushed stone or sand. After the well shaft has been repaired, a filter of sand and crushed stone is poured into the bottom. As a result, you get a new sealed well, saving effort, time and money.

ADVANTAGES!!!!

1. Light weight . The weight of the ring is no more than 35 kg.

2. Transportation . There is no need to order a manipulator.

3. Ease of installation . To install a well, a crane and additional devices and mechanisms are not required.

4. Sealing There are threads on both ends of the section.

5. Low price . The cost of similar products made of thin-walled polyethylene (thickness 10mm) ranges from 14,000 rubles per linear meter.

Name

Inner diameter, mm	Outer diameter, mm	Height, mm	price rub
Well ROTOLINE- 900/2150 with bottom	810	890	2150	15 000
Drinking well ECOSIS-950	900	950	1500	14 000
Drinking well EKOSYS-850	800	850	1500	14 000
Drinking well EKOSYS-730	680	730	1500	14 000
Well cover	—	730-950	100	4500

Reconstruction of an old wooden frame of a well 16 m deep using a spiral pipe D-600 mm:

Read more…

Types of sewer manholes

Hatches are distinguished according to the load they can withstand and their functional purpose:

• A15 (up to 1.5 tons) - used in the arrangement of green areas and pedestrian paths;
• B125 (up to 12.5 tons) – used in parks and parking lots;
• C250 (up to 25 tons) - used for road surfaces in urban areas;
• D400 (up to 40 tons) – for highways.

The hatches also differ in the location of installation on the neck:

• on a ring of unloading type;
• to the mine;
• on a retractable telescopic tube.

The method involving installation of the hatch directly on the shaft is used only for option A15 (pro

Materials for the manufacture of sewer wells

Plastic wells used in industrial, drainage and domestic systems are made from various polymer materials that differ in properties. These are polyvinyl chloride (PVC), polyethylene (PE) and polypropylene (PP). They are labeled as PVC, PE and PP.

Polymer rings for sewerage have the following features:

• PVC - resistance to chemicals and non-flammability;
• PE – complete tightness and the ability to restore its original shape many times after cycles of freezing and subsequent thawing;
• PP – plasticity and wear resistance.

As practice has shown, many consumers believe that a plastic waste disposal system, regardless of its functional purpose, is the best choice.
Among the main advantages it should be noted:

• low weight of the structure;
• tightness;
• good resistance to aggressive environments;
• ease of delivery to the installation site;
• easy installation;
• long service life;
• the ability to adjust the height during installation and after;
• availability of additional functionality;
• the ability to install a well with a smaller diameter;
• presence of ready-made solutions in the tray element.

The presence of various modifications of sewer wells on the domestic market allows you to choose the right model for a specific autonomous sewer system.

Advantages of plastic rings

The construction of sewer wells from plastic rings will cost more than from other materials. But the owner will receive much more advantages. So the standard diameter of concrete is 1 meter. This is so that a person can go down into the shaft to carry out pipeline maintenance.

Today this can be done without going into a well, which is why the diameter of modern structures starts from 315 mm. This reduces the number of excavations and the occupied space on the site.

Also, the advantages include the following:

• light weight - no lifting equipment required;
• variety of sizes;
• service life – 50 years or more;
• temperature range – from +50 to −70° C;
• good tightness;
• do not require cleaning - no plaque forms on the walls;
• can be equipped with a large number of additional accessories - ladders, necks, hatches, etc.;
• are not destroyed by freezing and thawing;
• the structure does not collapse as a result of ground movements;
• resistant to aggressive environments.

In addition, rings made of polymer materials can be equipped with everything necessary, for example, a tray with built-in pipes on the bottom. During installation, the tray is turned in the desired direction and the pipes are connected. The remaining, unused pipes are plugged.

Video: Prefabricated plastic rings for wells