Septic tank made of reinforced concrete rings

When landscaping a country house, one of the important tasks is to create an autonomous sewage system. And here it is difficult to do without a septic tank. Such a structure can be purchased or made independently. For the second case, different materials are used, for example, reinforced concrete rings. This option requires the cost of funds (rings need to buy, even used), but the result will be a durable and reliable sewage treatment plant.

Preliminary stage

Before you begin to install a septic tank from RC rings, it is necessary to carry out preliminary work. First, determine the location of the future construction. Here it is necessary to comply with the requirements of SanPiNa and SNiP. They indicate how far from the apartment building and other buildings a septic tank can be installed. Also in the documents are recommendations on the construction itself.

Based on the sanitary requirements, the septic tank should be located at least 15–20 meters from the apartment building. It is also necessary to comply with the requirements for the distance from the structure to the water supply system and water source. In the first case, this figure will be at least 10 meters, and in the second - from 30 to 50, depending on the soil on the site.

In addition, the septic tank must be placed in a place where assenizatorskaya machine can easily drive. The design itself will consist of two tanks. The first - the sump will be completely sealed, so for pumping the accumulated sewage from this tank will require the services of vacuum trucks.

Secondly, you need to decide on the size of the future design. For this, the number of people permanently living in the house is multiplied by 200 liters (average daily water consumption by one person). This indicator is increased three times - this will be the volume of the first chamber (settler) of the future septic tank. The second camera can be made smaller volumes.

Tip! The dimensions of the standard ring of concrete products (KC 10-8) are 0.8 m in height, internal diameter? 1 m. As a result, one ring will have a volume of 0.63 cubic meters or 630 liters of flow. Knowing all these indicators, you can easily calculate the right amount of rings.

In addition, it is worth asking about the depth of groundwater. The lower edge of the septic tank should be above this level. If this is not done, it is better to place the structure not deep down, but in breadth, using wider rings or making several septic tanks, placing them next to each other.

Preparatory work

It is said that the installation of a septic tank is expensive. First, the rings themselves cost money. Secondly, you can not do without the use of technology. Large rings weigh a lot (a few hundred kilograms), so it will be difficult to lay them by hand, but rings of small diameter can be installed by yourself.

First of all, two pits are digging in the chosen place. Their depth and diameter must be greater than the calculated values. Between them, you need to dig a trench that will connect the two septic tank. All work can be done manually or with an excavator.

Tip! The number of chambers can be done more, which will contribute to better drainage treatment.

If the soil is heaving, then at the bottom of each pit it is necessary to build a rubble cushion with fractions of 40–60 mm. The thickness of the layer must be at least 35 cm. Then the crushed stone must be compacted and a reinforcing grid must be laid. Now, at the bottom of the pit, where the first tank (settling tank) will be constructed, concrete is 15 cm thick poured. There is no need to concrete the second pit.

Mounting rings

After the concrete has hardened (from 1 to 3 days, depending on the weather), we proceed to the laying of the rings. To do this, use the services of a truck crane or machine with a manipulator. To save money, it is worth looking for a company that sells rings with their delivery and installation. Only in this case it is necessary to accurately match the delivery time with the concrete base freezing and the installation of rings.

When mounting the rings on the first septic tank, you need to ensure the tightness of the seams between them. To do this, use sand-cement mortar with the addition of liquid glass. Of course, ideal waterproofing is unlikely to succeed, but it is still necessary to minimize the flow of sewage into the environment.

Tip! The second tank, which will serve as a drain filter, must be leaky and smaller. Therefore, the use of sand-cement mortar is not necessary. Some experts recommend drilling the bottom ring in several places after its installation. So settled drains will better seep into the ground.

Now you need to connect both PVC tanks with a pipe. To do this, in the upper ring of the settler, at a distance of 35? 40 cm from the upper edge, a hole of the required diameter is made. In the second tank, the inlet should be slightly lower. So the pipe will lie with a slope, and blockages will not form.

Now it's the turn of backfill. The first tank is filled with ordinary soil layers, with the seal of each. In the second trench is used crushed stone of a large fraction. Its layer must at least completely cover the lower ring. Best of all, if the rubble will be filled up to the very top.

The final step will be to connect the sewage pipes from the house to the sump and close the tanks. For the latter, you can use reinforced concrete slabs, or build a screed. The main thing is not to forget about the arrangement of the inspection hatch. It will be needed for pumping sewage and cleaning the septic tank.

Video

This video shows how to make a two-chamber septic tank of concrete rings: