The analysis of soil and groundwater chemical composition in Kazakhstan has showed that they contain soluble salts of various concentrations. Therefore, one of the problematic tasks in constructing pile foundations on seasonally frozen soils with aggressive media is not only about to ensure proper pile driving, but also to ensure their chemical resistance against soluble salts. The main factors affecting the pile foundations when driving their permanently and seasonally frozen soils have been identified. It was established that as the main factors in the technology of driving pile foundations in frozen soils are the depth of freezing soil and appropriate method of driving piles. It has been established that in many cases construction is carried out in soils with aggressive environments, which raises new challenges for ensuring the chemical resistance of pile foundations. To ensure the chemical stability of pile foundations, new chemically active additives are proposed in the form of siliceous rock - flask and thermolitic sand. The results of the studies, it has been found that the use of siliceous rock-flask in the form of a filler in the composition of cement binder and thermolithic sand increases the chemical resistance of concrete in conditions of high-intensity salt and acid aggression by almost 1.5-3 times, respectively, in comparison with concrete on quartz sand.

This article assesses the more productive methods for thawing seasonally frozen soils. The most rational and progressive method of thawing seasonally frozen soils involves putting antifreeze additives into the soil. New goals and objectives for the development of pile foundation construction technology in seasonally frozen soils in northern and central regions of Kazakhstan is presented.

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One of the common challenges of driving piles in winter is frozen soil. The depth of frozen soil reaches two meters in Northern and Central Kazakhstan that made it difficult to build the pile foundations in cold months. In order to prevent the pile distraction, the places of pile installation are usually drilled by drilling machines which takes time and additional cost for preparatory works. In this paper we proposed a new method of preventing the soil from freezing by using an antifreeze reagent. The reagent can also be used to thaw the frozen ground which allows the construction works in winter months. During the static load test, the piles driven into the soil that had been applied with antifreeze reagent have shown more accurate bearing capacity data. The scientific and experimental studies have established that the antifreeze reagent reduces the ompressibility of frozen soil.