Just these primers swells upon freezing, may erode and subjected to other environmental influences. And there are a lot of ground. If everything had to build the foundation for the clay, it should deepen correspond to the entire depth of the possible . Thus, the soil sample – a mandatory process before construction of the foundation and building. And now is a detailed focus on the entire process of swelling, freezing and the influence of groundwater.
The depth of soil freezing is determined by the geographical location of future buildings. In this connection it may be different. For example, Volgograd, Kursk, Smolensk, Pskov characterized freezing to a depth of 1.2 meters. And Moscow, Novgorod, , St. Petersburg have freezing depth 1.4 meters.
Deeper soil freezing is observed in Penza, Vologda, Saratov, Kostroma – 1.5 meters. A very important factor is the groundwater level, and to neglect this information can not be. Ground water must be below the level of the depth of freezing. The reason is that during the freezing cold, exposed all the deeper soil layers. If this process reaches the groundwater, then turn them into ice, which guarantees the swelling of the soil and, consequently, the deformation of the building. But it's not so scary. The fact that the process of freezing never took place, and will not take place evenly, as, indeed, and thawing. Because of this, and there is a displacement of the foundation, the redistribution of the total load and as a consequence, cracks in various places.