Permafrost

lake and in purpose to protect surround area were made measurement on selected physical point
in March of 2005 by the equipment with equal temperature of Slumbered during six months of
spring, summer and autumn, where repeatedly installed all curves and made interesting figures
explanation.
In our conclusion the deep changing of seasonal thawing made by this method is equal to
studying of temperature changing. Therefore we are planning to continue our research work on
five physical points as Bus lake until 2007.
Key words: Spatial-Temporary Changing, electric resistance, freezing and thawing
The Active Methods of Stabilization of a Roadbed and Contact-line
and Air Line Supports on Permafrost
V.G. Kondratiev
(TransEGEM)
Abstract: Reasons of deformations of a roadbed and contact-line and air line supports on
permafrost are analyzed. For example deformations of embankment have long character and are
usually connected to degradation of a permafrost in the basis of roadbed under influence of
increase in amount of solar radiation absorbed by roadbed in comparison with a natural surface,
infiltration on warm summer precipitation through a body of an embankment, increase in
thickness of a snow cover at the basis of an embankment and in adjoining territory. On slope
this is promoted also by a filtration of surface and underground waters in a body and the basis
of an embankment.
The active methods of strengthening of the foundation of a railway roadbed on ice-rich
permafrost by ratio control cooling and warming factors for conservation of the foundation in
constantly frozen state (by the help of a snow removal and painting, sun-precipitation protective
shed, cross-section cooling pipes, the film shield, a longitudinal refrigerator) or preventive
excision of icy blocks of soils (ice lenses) from the foundation with simultaneous filling-up of
generating concavities with non-subsiding soil mass (on the basis of a spray process
engineering) are defined.
Experience of development anti-deformation measures for the Russian railroads
(Berkakit-Yakut railway, Transbaikalian railroad, access railway track Ulak-Elga) with
utilization active methods of strengthening of the foundation of a railway roadbed on ice-rich
permafrost is illuminated.
New technical solutions anti-frost heaving devices for contact-line and air line supports on
permafrost and a deep seasonal freezing of the soils, providing decrease of forces of a regulation
seasonally-thawed soils with a lateral area of a support and reduction of their power and
humidity are defined also at simultaneous magnifying of pinching down action of the
transmission tower footing by upheaval of a roofing of permafrost by means of the taken out a
patent for modes; experience of design and the installation new anti-frost heaving devices is
featured at renovation of an overhead contact system Transbaikalian railroad; the first outcomes
monitoring probing of their efficiency are illuminated.
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