盐场分析.pdfVIP

26 Vol. 26 Suppl. 2 0 0 4 8 JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY Aug. 2 0 0 4 Article ID: 1000-0240(2004) Suppl.-0044-06 Research in the Field of Salt in Freezing Soils ( ) ING Hui( ) , HE Ping( ) , YANG Cheng-song( ) ( St ate K ey L aboratory of Froz en So il Engi neeri ng , CA REERI , CA S , L anz hou G ansu 730000, Chi na ) Abstract: As to salty soil, salt migrates with water in freezing soils, assembles and crystallizes continuously. Consequently the swelling of the soil volume leads to the phenomenon of salt heaving. It has a practicalsignifi- cance for solving salt- heaving and frost- heaving damage in engineering to deepen the understanding of salt heaving mechanism. In this paper a general overview about new research results at this aspect w as presented. And then the study of salt migration and salt heaving mechanism and present salt heaving models w ere sum- marized. For further researching the field of salt transfer it is urgent to continually strengthen the salt migra- tion and the numerical simulation study of salt heaving mechanism to expect perfecting the general evaluation of salt heaving prediction models so as to have a better service for engineering. Key words: freezing process; salt migration; salt heaving; saline soils + CLC number: P642. 11 5 Document code: A the development of west in China, the problem will be concerned as