- The differences between the freezing depth of seasonal freezing
on large areas of our planet marked freezing winter temperatures at which water freezes on the surface, andwater in the soil.The ground in this time period is frozen at a certain depth.With decreasing temperature and increasing rate of freezing.This factor is of great importance in the construction, as it partially defines depth of the foundation of the house, as well as laying pipelines which transport the water.There is a concept of normative depth of freezing ground.This value depends on the geographic location of a specific territory.To determine the depth of soil freezing were carried out long-term observations, according to which the average values were recorded temperature.It should be noted that the definition of the indicator was carried out in the absence of snow cover.
differences between the depths of freezing
In practice, the real mark of soil freezing and normative depth of freezing, whic
As the ground freezes
- fact that virtually the entire territory of Russia and many other countries there is a long period of time under the snow, but it is significantly reduces the depth of soil freezing.In addition, when his presence is increased and the humidity indicator, and it also affects the frost.
- When building a house, where people will live not only in the warmer months, but during the cold period of time, of course, arranged heating system.This factor also affects the soil freezing mark - it will be much higher than the level in the area of regulatory foundation.At the same time, in terms of building a summer house, which will be staying only in warm weather comfort on the depth of frost will not affect the above factor.Not much to deepen the foundation, you can take advantage of new technologies that exist in the building.To do this around the house need to put any suitable insulation that protects the foundation from frost, thus, eliminate the need to spend the extra construction work.With this ground-tech admission is insulated and the level of foundation base can be raised higher than it is allowed, based on the value of normative depth of freezing.Thus, you can not be afraid that the foundation of the winter will be deformed.For greater reliability in the construction of the house can use a strip foundation, which is a foundation of reinforced concrete.This design distributes the load and perceives is reliable and relatively simple construction.Such a foundation in a stable depth of freezing can be done melkozaglublennym.
After the above information, you can think, will the benefit or detriment of clearing snow.On the one hand, this event will deliver the cleaned area from flooding during the thaw, the other - cleared areas will be bare and, therefore, are more susceptible to penetration into the soil the minus temperature.The presence of snow in this case is a useful phenomenon.Not to be blown away from certain areas on the site can be planted shrubs that will prevent the bare soil in freezing weather.
map the depth of soil freezing
in different territories, which are located in different zones, seasonal freezing of soil is determined in accordance with SNIP 2.02.01-83 *.Experts for many years were observation and the mean value of the freezing level.According to para. 2.27 the depth of soil freezing can be calculated by the formula:
dfn = do ∙ mt, where
do - a figure that depends on the type of soil.
When clays and loams do = 0,23, sandy loam and fine sand - 0.28, gravel sands and their size above average - 0.30, coarse soils - 0.34.
mt - coefficient, which is determined by summing the biggest monthly average sub-zero temperatures in the winter for a particular area.To define it, you need to use the table 3 SNiP 23-01-99 *.
The formula shows that the mark of soil freezing affects soil type.For each of them received their own individual rate.It is also laying the foundation for determining the home affects the groundwater level.If the depth of soil freezing is superior to the groundwater level, this fact must be taken into account in the construction of the foundation.The water in the frosty weather will freeze, expand and exert pressure on the ground.Under the influence of ground ice will move and act destructively on the foundation.For this reason, the foundation is required to build the house below the depth of freezing.
freezing depth in some cities
For example, the depth of seasonal soil freezing in the Leningrad region is 1.20 m, in the Moscow region - 1.40 m.
specialist will tell you whyso it is important to take into account the depth of freezing: