The development of the natural resources of the North and territories with permafrost is an urgent task for countries located in the northern regions, the solution of which is complicated by extreme climatic conditions. Competent arrangement of the base under any structure is an extremely important task, which is solved only by experienced and qualified specialists. This article describes models with the presented optimal methods and technologies for strengthening and strengthening soils and foundations during the construction and reconstruction of construction projects in the Far North using modern material - cryogel.

As a result of a review and analytical search based on patent research and development, a new method of assembling cross-truss structures in relation to modules of the Pyatigorsk type has been optimized. The scope of its rational application is outlined, including the construction of new facilities and the reconstruction of existing buildings. The efficiency of assembling such structures in earthquake-resistant construction, including flexible upper floors capable of dampening mechanical vibrations, is noted. The continuation of flexible manufacturing technology in this method of assembly has been revealed, when the entire set of cross-truss structures of full factory readiness is mounted on the construction site in the project position. At the same time, all assembly and welding, transport, installation operations in shop and building conditions are performed by the same personnel due to their high qualifications, which ensures the necessary and sufficient competitiveness under the most difficult conditions of the economic conjuncture.

The technologies of the device of anti-filtration elements in ground dams of hydrotechnical construction are considered. Currently, the following problem is relevant, which of the methods of the device of anti-filtration elements is more expedient, profitable and less time-consuming. Promising areas of innovative developments for the construction of underground dams are: the method of jet cementation; the method of injection curtains. A detailed analysis of technologies for the construction of anti-filtration elements at the Sangtudinskaya hydroelectric power station (HPP)-1 is carried out on the example of the jet cementation method. A wide range of non-ground construction materials is used to create anti-filtration elements in ground dams and non-rock foundations of dams. These are stone building materials based on binders, polymer materials, wood and even steel. However, the materials used for anti-filtration devices differ from those used in industrial and civil construction. They may differ in structure, composition, and application technology.