Ways of strengthening railway embankment basis on ice-rich permafrost are characterized by regulating cooling and warming factors for preservation of the basis in constantly frozen condition (with the help of snow rem...Ways of strengthening railway embankment basis on ice-rich permafrost are characterized by regulating cooling and warming factors for preservation of the basis in constantly frozen condition (with the help of snow removal, painting, sun-precipitation shed, cross-section cooling pipes, the film cover, and the longitudinal cooling device) or removing icy masses preventively from the basis and filling the cavities simultaneously with not subsiding soils (with use of jet geotechnology). Skilled-experimental development are shined on the basis of new ways of strengthening embankment basis on ice-rich frozen soils.展开更多
The history of railway and highway construction in permafrost zones in Russia, the United States, Canada, and China spans more than 110 years. Nonetheless, no railway track or highway has yet been built in such area t...The history of railway and highway construction in permafrost zones in Russia, the United States, Canada, and China spans more than 110 years. Nonetheless, no railway track or highway has yet been built in such area that is impervious to deformation caused by subsidence resulting from the thawing of ice-rich subgrade soils. This paper presents data on the roadbed states of the Trans- baikalian and the Baikal-Amur Railways as well as the Russian ＂AMUR＂ Chita-Khabarovsk Highway. It also discusses the feasi- bility of roadbed stability maintenance using methods based on the reduction of the mean annual ground temperature and roadbed preservation in a permafrost state by means of the natural cooling and heating factors ratio regulation resulting in a reduction of the heat generation in the roadbed and the adjoining area accompanied by an increase of heat consumption with help of the sun-precipitation protective sheds （awnings）, rock covers, dolomite powder （reflective paint）, cooling tube and thermosyphons as well as tower supports and corrugated pipe culverts stability.展开更多
文摘Ways of strengthening railway embankment basis on ice-rich permafrost are characterized by regulating cooling and warming factors for preservation of the basis in constantly frozen condition (with the help of snow removal, painting, sun-precipitation shed, cross-section cooling pipes, the film cover, and the longitudinal cooling device) or removing icy masses preventively from the basis and filling the cavities simultaneously with not subsiding soils (with use of jet geotechnology). Skilled-experimental development are shined on the basis of new ways of strengthening embankment basis on ice-rich frozen soils.
文摘The history of railway and highway construction in permafrost zones in Russia, the United States, Canada, and China spans more than 110 years. Nonetheless, no railway track or highway has yet been built in such area that is impervious to deformation caused by subsidence resulting from the thawing of ice-rich subgrade soils. This paper presents data on the roadbed states of the Trans- baikalian and the Baikal-Amur Railways as well as the Russian ＂AMUR＂ Chita-Khabarovsk Highway. It also discusses the feasi- bility of roadbed stability maintenance using methods based on the reduction of the mean annual ground temperature and roadbed preservation in a permafrost state by means of the natural cooling and heating factors ratio regulation resulting in a reduction of the heat generation in the roadbed and the adjoining area accompanied by an increase of heat consumption with help of the sun-precipitation protective sheds （awnings）, rock covers, dolomite powder （reflective paint）, cooling tube and thermosyphons as well as tower supports and corrugated pipe culverts stability.
