Foundation of asbestos cement pipes with their own hands

The foundation of asbestos-cement pipes is used in the construction of light buildings of timber or erected by frame technology. It is considered one of the most common and does not require significant effort and cost of construction. Such supports are ideal in regions that are subject to frequent flooding, because they are very strong and resistant to the adverse effects of a humid environment.

The device of the foundation of asbestos pipes has some advantages:

• ease of execution - to create does not need special construction equipment;
• high speed;
• easy calculation - it can be performed independently using a simple algorithm;
• insignificant expenses for the purchase of materials - asbestos-cement products are relatively cheap, their price starts from 100 rubles per linear meter.

Of course, this type of foundation has its drawbacks:

• it is impossible to create a base from asbestos-cement pipes if the ground is movable in a horizontal plane or there are large elevation differences;
• You should not build a house above 3 floors, and also use heavy materials for finishing, for example, decorative stone, because in this case the structure becomes unstable;
• If you are planning a basement or basement, then this option is not suitable.

How to calculate the foundation

When calculating, first of all, it is necessary to determine the depth of freezing of land in your region. You can get information from reference books or websites. In the resulting figure, add 30-50 cm - this is a sufficient amount of the underground part of the piles.

The above-ground part is usually assumed to be 30 cm, but if at the place of work there is a possibility of rising water, the posts can be extended to a safe height.

The thickness of the supports is taken depending on the weight of the building. For a house from a log house or wooden frame, choose pipes with a cross section of 25–30 cm. Light structures: bathhouses, gazebos, terraces are quite 10 cm in diameter.

The piles are installed at the points of greatest loads and along the perimeter of the load-bearing walls with a step no wider than 1 m. The distributed pressure on each support should not exceed 800 kg. Otherwise, the number of pillars should be increased.

Construction technology

Plot equate and mark out the contours of the building. Of particular note are the angles and intersections of the walls. In these places necessarily provided piles. For marking it is most convenient to use ropes and pegs. To ensure that all sides are perpendicular, check that the box diagonals are equal.

Consider that when building an unevenly loaded building, for example, a capital house with a veranda or terrace attached to it, it is necessary to lay separate foundations with upper strapping. It is necessary to provide for the presence of a deformation seam that will separate the two circuits - it will save the building from destruction with an uneven distribution of masses.

The next stage is the drilling of wells under the pillars-supports. The depth of asbestos-cement pipes must be the same. And the deepening itself is 20 cm more than the calculated underground part.

At the bottom of all the pits, it is necessary to remove all large stones and create a gravel-sand pillow. Sand and crushed stone are filled up with a thickness of 10 cm each and carefully rammed, pouring water over it. When moisture is absorbed, a canvas of roofing material is placed on top of the pillow and only then the pipes are installed.

The pillars are aligned in height, and then fixed with temporary wooden posts. If aquifers lie close to the surface, it is necessary to waterproof the underground ends. Best suited for this bitumen mastic.

Asbestos cement pipes should be strengthened from possible heaving of the soil, filling them with concrete at the base and inside the case.

To prepare the mortar, mix the cement with sand in a 1: 2 volume ratio and add water until the consistency resembles a batter. Then in the sand-cement mixture, you need to add 2 pieces of fine gravel.

The resulting solution is thoroughly stirred and pour the bases of the supports to a height of 40–50 cm. For this, the pipes are lifted, concrete is poured into the recess. Piles return to the site, pressing in a slightly seized mass. After drying, it is waterproofed with roofing material or hot mastic and wait for drying before falling asleep with sand and soil.

Inside the pile, 2–3 reinforcement rods interconnected with each other are placed with wire, and the remaining volume is also poured with concrete. It is necessary to remove air from the solidifying mass, for this it is periodically pierced with a rod.

The foundation is completely dry and will pick up the necessary strength in a few weeks. On top of the supports is strapping of metal lintels, beams or timber. She will allow to level loading between all piles. After that, you can begin to build the building itself.

If you have already engaged in the construction of the foundation of asbestos cement pipes, share your experience with our readers, leaving a comment on the article.

Video

We offer to watch a video about pouring concrete from asbestos-cement pipes with concrete: