Bored piles with raft Foundation: technology, types, description, reviews

A Bored pile with raft, the technology of which is described in the article, today are used quite often. This is because this type of Foundation is capable of withstanding building almost any type of soil.

Features of the Foundation

The installation of the piles required below the level of soil freezing. This base is suitable for the relief of the terrain, the territory of which there are inclinations. To start the construction work of piles on the soil of any type. The work will have no impact on nearby buildings and structures on the ground. If you use this basis, the construction can be build even in close proximity to the pond, which is impossible with other types of foundations. Bored piles with raft is able to withstand any building for the use of timber frame, log and brick houses.

Construction

A Bored pile with raft, technology installation which will be described in the article, should be mounted in increments of 100 to see If this distance will be reduced, then the support can deform in the process of operation. As an exception to the above rule performs the installation of the Foundation on the rock. The minimum step shall not be less than 30 cm in order to calculate the distance between the supports, it is necessary to use information that reflects the load bearing capacity of pillars of different sizes. Thus, if a bored pile with raft, the technology of which is described in the article are mounted under the building, whose weight is 50 tons, it will be necessary to use a 50 supports. The diameter of the latter should be equal to 15 see as an alternative solution you can use the 17 piles, the diameter of each of which shall be equal to 25 cm. the Minimum allowable spacing of piles in a tape base is equivalent to two meters. If you intend to build a monolithic grillage, you should prefer your 300 millimeters. Thus the bearing capacity of a pier is equal to the limit from 1600 to 1700 pounds. In order to build the average house will need about 70 piles.

Varieties

If you want to install bored piles with raft, technology and types have to be pre-considered. As basic types such grounds are the Foundation with roof grillage and Foundation with monolithic grillage. The first type involves the presence of small distances between raft and soil. Its width can vary from 80 to 100 millimeters. This creates the impression that the building hovers over the ground. This design is used when necessary to protect the Foundation from the swelling. True, such a construction and in areas at risk of flooding. Among other things, settling the basis on marshy ground.

As for the Foundation with monolithic grillage, it most often build houses of block, brick and aerated concrete. Monolithic raft Foundation is a concrete strip that forms a single structure through the unification of the piles. The support of this ground are installed to a depth below the frost line.

General description

The Foundation on bored piles, with manual installation which is described in the article is, as already mentioned, high load-bearing capacity. Thus, the column diameter is 30 cm, capable of withstanding 1700 kg. whereas the pillar of 50 cm can endure 5,000 pounds. With a slight increase in the size of the bearing capacity increased by several times. On the bearing capacity not only affects the prop size, but the material from which they are made. In addition, there is a need to consider bearing capacity of soils. This will depend on whether to leave the prop down.

Technology arrangement

If you decide to equip the Foundation with raft Foundation on bored piles, it is important to familiarize yourself with the technology of the works. To start using mechanical or hand drill should create a hole, which should be located below the frost line of the soil. The soil should not be removed from the wells, sealing and stamping it. In the resulting pit is placed a roofing material, which is folded in the form of a cylinder. It is necessary forwaterproofing. Received inside of the pipe should be installed reinforcement cage. In the next step the space is filled with a mixture of concrete, selected brand. After the solution completely freezes, the support poles can be considered ready. Will just have to carry a bunch with the cap, then we can assume that the qualitative basis for the house is ready.

The Cost of the work

If you decided to install bored piles with a raft Foundation, the technology, the price of such grounds you should be interested. The first part of the question has already been covered above, then how about the cost you can find out by reading this article. The price of the works is affected by the material in the Foundation piles, the number of columns and the complexity of the work. Among other things, will be considered delivery to the construction site. The average cost of installation of this design will vary from 2000 to 3000 rubles per square meter. If you decided to install bored piles with raft, the technology of which was described above, some types of work you will be able to make your own.

Thus, the cost will be lower if one of the following will be carried out by yourself. It can be: the layout, the formation of wells, concreting and installation of the grillage.

Customer Testimonials

If you got the task of arranging the above-described base type, then you should be studied the technology of the Foundation, bored piles and grillage are integral components of the design. It is important to know prior to the start of work. However, it is necessary to read reviews. All the masters who have already engaged in such work, point out that this kind of Foundation can be easily equipped on your own. Future owners of private houses is quite often the dream to complete the construction, saving money. This can be achieved if your choice will become bored piles with a raft Foundation. Experts say that in the end will be able to get enough reliable and solid framework that will serve as the Foundation of any home, helped save a budget.