Grillage on piles: features of technology

Grillage on piles is the best solutionFor structures built on weak or unstable soils. The main purpose of this design is to combine the load-bearing elements in a monolithic structure, which gives the building an additional margin of strength and reliability. This technology provides for the presence of reinforced boredeway piles, the diameter of which varies between 25-40 cm, driven into the ground to a depth of 1.6-3 m. The grillage on piles is the upper tier of the foundation foundation, made in the form of a thick monolithic concrete slab or tape.

Foundation of the foundation for this technologygives the structure greater reliability and stability. This is due to the fact that the grillage on the piles holds and holds together vertical supporting structures. This gives additional strength to the structure and counteracts the forces of frost heaving of the soil. The pile field for grillage on piles consists of vertical bearing structures, set at intervals of one to one and a half meters, depending on the type of soil and the depth of the frozen layers.

To lay this structure aroundthe perimeter of future walls is digging a shallow trench of about 30-40 cm. Then in it, with the help of a special drill, holes are created to fill the pile structures. Inside the holes, an asbestos-cement pipe with a pre-bonded reinforcement frame is lowered. The trench is also laid out with geotextiles and filled with sand. On the resulting cushion mount the formwork. Then the whole structure is poured with concrete, which is a very important operation.

Here it is necessary to useA special vibrator to compact the mixture and remove air bubbles that contribute to the formation of cavities of the most diverse fractions. This may further lead to structural cracking and collapse of the entire building. Monolithic grillage on piles should be reinforced to give it resistance to bending stress. Otherwise, at the slightest deformation, there will be a threat of cracking of concrete.

Strengthens grillage with two hardness belts -upper and lower, consisting of several longitudinal steel rods, the number of which depends on the mass, height of the structure and the type of soil on which it is erected. This construction is also reinforced with a transverse reinforcement that does not take on the load, but is necessary to bind the whole frame to a single monolith.

In modern large-scale constructionsuch materials for grillage as steel and prefabricated reinforced concrete structures of grade M350 on a granite basis are used. When constructing wooden buildings from a bar, the grill is often served by the lower ledge of the beams, placed directly on the piles. Also in this capacity, I-beams can be used. True, this option is more expensive.

According to the current technological standards of grillageIt can be used in the construction of capital brick buildings, but also in the constructions of concrete blocks or arbolita erected and combined with clay soil, in soil of average density and a high water saturation.