Permafrost

Payuta, settlements Aksarka, Katrovraj, Yar-salie), Nadim, and also deposit Hakandjinskoye
closely Okhots, Mirniy in Yakutia, the gas pipeline in Chukotka and oil pipeline Eastern Siberia
- Pacific ocean.
Thus the amounts of works were distributed as follows. 40 % - were equaled at new
construction with performance of design stages, construction and supervision. 60 % - were
equaled at correction of mistakes of the designers and builders who are finding out in a course
or upon termination of construction of buildings and structures, and also at elimination of
emergencies on working objects arising for the different reasons. In all these cases grounds of
the bases are used by a principle of preservation them frozen state or the transition to this
principle is provided. As cooling tools the systems HNWP and system VNWP, used both in a
combination with ventilating under-floor, and without it are applied the Plutonic working
seasonal device (SCD) and individual working seasonal device (ISCD). All systems of
grounds temperature stabilization of the bases and devices are vapor-liquid.
The system HNWP represents placed in embankment a network of horizontal cooling
pipes of a small diameter filled with the heat-carrier and connected with aboveground by the
condenser block. All system is completely tight, and the movement of the heat-carrier is carried
out on classical without-pump method. At construction of buildings and structures (for example,
tanks) the system HNWP is alternative to the ventilating under-floor. Thus it is much more
effective, allowing to construct buildings with floors on a ground of width up to 100 м with
significant economy of material inputs and territory. It is also perspective for roads and open
platforms.
The VNWP system differs from HNWP system only by the fact, that placed in
embankment horizontal pipes in certain places are additionally connected to vertical or inclined
pipes, which in this case are cooling. Individual ISCD are applied all over the world and are
produced in two types: filled and with of the heat-carrier in an underground part. We use both
types: for building depths 10-12m is admitted (or is desirable) film currency. In case of large
ISCD accommodation depths in a ground and under any corner to horizon are applied filled.
The combinations of these systems and ISCD are totaled many variants, that allows to
solve any tasks of construction, repair and elimination of emergencies. The serious attention
FSA pays on quality of installation works and maintenance of reliability of described systems.
Through manufacturing process of all products the special attention we give to the quality of
welding. In consequence with small diameters of used pipes we use an automatic rotating
electric-arc welding (REAW) with the computer control of modes and results of welding,
including field installations with the portable welding head, which can leave from the
automobile on 50m and thus serve all territory of builded object.
Key words: Esigning, construction, repair, bases, buildings and structures, permafrost
24