Plastic insert in the well: step-by-step installation instructions

Arrangement of an autonomous source of water intake at the site requires a careful approach. Particular attention should be paid to sealing the walls of the well. Agree, I would not want to receive contaminated water during the operation of the mine.

A plastic insert in the well, which is used to equip a new or restoration of an operated water intake point, helps to prevent this problem. In the article we examined in detail the pros and cons of such a solution, gave tips on choosing a polymer insert, and also described the procedure for installing it in a well.

Purpose of plastic inserts

The main advantage of plastic structures is their practicality. Unlike concrete rings they are easy to transport to the place of assembly, which inevitably reduces shipping costs. When installing them, special equipment is not needed.

Plastic inserts protect against falling land falling into the well, seepage of ground and surface water, serve as an insulating barrier and an element for the formation of well walls.

The inserts are separate segments of the corrugated pipe, connected together. Usually these are pipes made of polyvinyl chloride and other polymers. The diameter of the inserts is 30-60 cm. The wall thickness starts from 0.8 cm

The better the plastic, the longer the well will last.

Stiffeners perform two important functions in the design:

1. Give extra structural strength.
2. Serve as ground hooks, protecting from ascent.

Extra rigidity is needed to prevent deformations caused by soil movement. Mostly they occur for natural reasons. In this regard, concrete structures are more resistant to mechanical stress.

Performing the function of soil hooks, stiffeners prevent the ascent of the tank.If there were none, then with an increase in the level of groundwater, the capacity would inevitably rise. Such ascent leads to structural deformation.

Advantages and disadvantages

Plastic is resistant to natural biodegradation and can be in the ground for more than 50 years. At the same time, it combines the properties of strength, elasticity and tightness. Concrete products used in the construction of wells cannot boast of such characteristics.

In addition to resistance to decomposition, the walls of the plastic container are not affected by moss. If we compare plastic with concrete, then the latter tends to collapse under the influence of the environment.

As the temperature drops below zero, the water contained in the pores of the concrete begins to crystallize and increase in volume. As a result, porosity increases and the density of concrete stone decreases along with strength.

Bacteria colonies settle in the pores of concrete and moss spores are delayed. Over time, they grow, then inevitably leads to the destruction of the walls and the deterioration of the quality of drinking water

The design flaws include possible plastic damage by tree roots. Not recommended build a well or a well with a plastic shaft near them.

Another disadvantage is that with prolonged exposure to sunlight, the material becomes brittle. This leads to damage to the manhole cover if it is made of plastic. In addition to sunlight, the frost-resistant polymer is easily damaged in severe frosts.

It is not recommended to use plastic covers for wells if the temperature in winter drops below -25 ° C.

The advantages of plastic inserts include their reliability. Since with proper warming the temperature around the trunk within the zone of seasonal freezing does not fall to zero values, the risk of damage to plastic in tubular and shaft wells is minimal. Sealing failure may occur if the plastic insert is not properly secured.

During restoration and repairing an old well from concrete rings, the following fastening method is sometimes used:

1. Lower the insert into the well.
2. Fix it with anchors with rubber or silicone gaskets.
3. The remaining space between the rings and the insert is filled with gravel, fine gravel or sand.

This installation leads to the need to replace gaskets, which eventually become unusable. With this installation method, damaged rubber parts are difficult. As a result, a gap is formed between the anchor and the insert. Through these slots, surface water enters the well, leading to a deterioration in the quality of drinking water.

This is dangerous if there is a drain pit or septic tank made of concrete rings near the well. Since the quality of wastewater treatment in the absence of additional equipment is low, a significant part of the pathogenic microflora gets into groundwater, from where it moves, infecting sources of drinking water (+)

Through holes created by improper installation, bacteria can enter the well. A sure sign of depressurization is dark wet or dried smudges that go down from the anchors. If they are found, it is necessary to immediately treat the leak points with sealant. This procedure will have to be repeated as necessary.

The main causes of clogging wells

If the trunk is not sealed, then the causes of clogging or deterioration in the quality of water from the intake structure may be:

1. Rare use of the source.
2. Contamination from the outside.
3. Wrong place.

The problem with stagnation of water at the points of water intake occurs, as a rule, in cottages. In houses where residents live year-round, there is a continuous renewal of water. This problem is easily solved if emptied, and then sanitize a well.

The lid perfectly protects against dust and soaring soot in the atmosphere. In regions with a cold climate, two covers are recommended. One is intended for installation outside, the other in the insert itself, but one meter lower. This design completely solves the problem of large debris

A serious mistake is the design of a source of water supply in ironized soils close to the surface. With this problem water becomes cloudy and takes on a noticeable rusty tint.

They solve the problem by installing a multi-level filtering system. In addition, the concentration of iron can be increased in water. This makes it unsuitable for drinking purposes without pre-cleaning.

How to choose an insert in a water supply well

When planning a purchase of a plastic “sleeve”, it is necessary to evaluate two main selection criteria: insert diameter and polymer thickness.

Insert diameter. If there is a ready-made well shaft, the insert should be of such a diameter that there is a distance sufficient to fill fine crushed stone, sand, or to fill with mortar to the edges of the foundation pit.

The distance from the edge of the pit to the corrugated insert must not be less than 20 cm. The diameter of the insert is determined from this.

Plastic thickness. The thicker it is, the stronger the structure, but this one affects the cost of a running meter. It is not worth saving, acquiring a too cheap option, since if the walls are damaged, you will have to dismantle the entire structure.

In the market you can find models that are equipped with special stairs. Their presence facilitates the movement inside the mine, but is also an additional weak point

When using the elements of the stairs can damage the plastic walls, however, if the source of water has a large depth (4-5 m or more), then you can not do without them. If the aquifer is located in bedrock, then a permit will be required to install the water intake facility.

Restoration of the old well: progress

Plastic inserts can be installed directly in the well, or in an existing concrete well. Both installation options will be considered. First, the restoration process of an existing well.

This requires a minimum amount of time, since the bulk of the work has already been done.Drilling a tubular well from scratch requires a lot of effort. It’s important to choose the right place. The life of the well largely depends on this.

Before starting work, it is necessary to pump out water and clean the walls of the old well. This can be done with an ordinary spatula, going down to the bottom of the mine. This must be done if the distance between the insert and the concrete rings is filled with concrete.

Filling with a solution completely solves the problem with the strength of the structure, but makes it motionless. With this method, reuse of the insert is not possible.

Fixing with crushed stone or sand allows for simple dismantling, which will make it easy to fill up an old well. At the same time, no concrete structures remain on the site. Everything is dismantled and has the ability to transfer.

If the well is not overgrown with moss, then it is not necessary to clean its walls. After cleaning the walls, the old drainage must be completely removed. As a rule, gravel of different fractions is used for filtration.

After removing the crushed stone, you can proceed to install the insert. First you need to assemble it correctly. The individual segments are interconnected using sealing rubber parts. The connection method is similar to assembling sewer pipes, but on a larger scale.

Also, the pipes are screwed onto the thread. Assembly segments of the insert must be carried out on the surface. After the structure is assembled, it is lowered into the well

Depending on the length of the structure, it can be installed manually or with the help of equipment. Lower it carefully. It is necessary to ensure that there is no sharp impact on the bottom of the mine, since plastic can crack when exposed to mechanical stress. At the next stage, the insert is fixed in the well.

If the distance allows, then the space between the walls of the well and the assembled structure is covered with gravel. For this, in addition to small fractions of crushed stone, a large one will also be required to ensure optimal adhesion

If the diameter of the well is slightly larger than the insert, then the distance is poured with a mortar with a cement or gypsum base. To knead the binder, you need a sand-gravel mixture, a direct binder and water. For the solution, it is necessary to mix three parts of ASG and one part of cement.

Water is added gradually, its amount directly depends on the humidity of the ASG. The finished solution is poured between the insert and the well along a special trough, which is a sheet of bent tin. After pouring, it is necessary to leave the well for 2 to 3 weeks until the solution solidifies completely.

Arrangement of a new water intake point

Consider the step-by-step technology for creating a well using a plastic “sleeve”. All work conditionally divided into three stages.

Preliminary planning and layout

If the site does not yet have a water source, then it is better to give preference well drilling. Professional drillers will build production in one / two days. These services can be ordered from specialized companies or firms engaged in drilling wells in the private sector.

Even when using a mobile drilling rig, drilling the water intake will take no more than a couple of days. It’s better to manually dig a well. For the construction of a private source of water in suburban areas, permission is required only in the case of an artesian well

Before starting work, it is worth interviewing neighbors who have their own farm well or well. The information obtained from them will help determine the approximate depth of production, the mark of the water mirror, and the presence of a water trap if it was encountered during the construction of neighboring sources.

In addition to this requirement, you must select a suitable location on the site. The source of drinking water should not be located near the septic system or farm buildings for the maintenance of subsidiary plots.The minimum distance of the marked objects is 25 m.

Trees should be avoided near the well. Their powerful roots can damage the insert. The same rule applies to the septic tank device. If there are trees at the well site, then you need to cut them

After marking and drilling, the insert segments are assembled into a single unit. This process is simple. Everyone can handle it. The segment assembly process has already been described. Unlike the previous method, concrete rings are not used here. A plastic insert is placed in a pit and sprinkled with rubble. The following is a filter device.

Installing a bottom filter

The bottom filter consists of several layers. If the bottom of the excavation is buried in fine or dusty sand, then the first one is a wooden lattice or a perforated shield from the board.

He sank to the bottom. On top of it place a piece of geotextile, cut to the diameter of the mine. It will perform the function of fine cleaning instead of sand. The material is easy to handle, but requires replacement as it becomes clogged.

Crushed stone is placed on top of the geotextile in the following order:

1. Layer of crushed stone of small fraction 15 - 20 cm.
2. Coarse gravel layer of large fraction 10 - 15 cm.

This avoids the ingress of fine sand suspension and gravel into the produced water. The bottom filter device is especially important if a pump is installed in the well, as the listed contaminants are able to disable the unit.

Crushed stone spills out to the bottom of the well with buckets. It is necessary to control the uniformity of distribution bottom filter - it affects the quality of the water.

Inspection and adjustment of equipment

The first start-up should be done only after making sure that the equipment is connected correctly. Do not use water for drinking purposes immediately after installation. It is necessary to remove the dirty fluid accumulated in the well by the pump, and with it the sediment that has got into the mine when the tab is installed is removed.

To remove water, it is necessary to lower the pump hose to the bottom of the well and pump water into a container in a personal plot. In the future, it can be used for irrigation.

If there is no storage tank, then you can drain the water directly into the ground, but at a considerable distance from the well. Only after these steps can the pump be connected to the domestic water supply system.

Maintenance and cleaning of the well

No matter what material the well is made of, it needs cleaning and system care. It is necessary to do a periodic inspection, as debris can get into the mine. This can lead to clogging and decay of the water at the intake point. In such cases, the mine is cleaned and water is repeatedly pumped.

Another cleaning method is to replace the bottom filter at the bottom of the well. If this element becomes clogged, then the water becomes cloudy and musty. To prevent such situations, it is necessary to change the gravel and geotextiles at the bottom of the well.

The popular method of cleaning is the addition of a small amount of potassium permanganate to the well. It kills microorganisms that live on the surface of stones. After such a disinfection, water from the structure must be pumped out several times. If you do not clean the well and neglect disinfection, then over time the water will become worthless.

Conclusions and useful video on the topic

The roller demonstrates the process of installing a plastic insert with the subsequent preparation of the water intake structure for operation:

How to make a bottom filter for cleaning well water:

In some places, own water intake is the only way to get drinking and industrial water. The use of a plastic insert can extend the service life of the structure, which means that it saves on re-drilling or digging a new one.

With proper installation, the insert can be reused if the well becomes unusable. This is a useful acquisition that reduces the cost of well equipment.

There is something to supplement, or there are questions about the use of a polymer insert for a well - you can leave comments on the publication. The contact form is located in the lower block.