| In our country these years in scientific research in permafrost put huge efforts,especially in permafrost embankment of highway and railway,and the Sino Russian oil pipeline foundation treatment as the representative of the research and development work has achieved satisfactory results.However,the permafrost area is wide,and the area of frozen soil in China reaches more than 75% of the land area.The vast permafrost region is rich in resources,and with the increase of China's comprehensive national strength,the number and size of permafrost resources development project is increasing,many kinds of engineering construction have higher requirements on the construction process and technical standards,coupled with the dangers of global warming on the stability of permafrost structures,research the work of the frozen injury and prevention of the increasingly urgent need,is also more prominent.Based on the greater hinggan mountains area in heilongjiang province hydraulic structure foundation principle was used to study permafrost region,in the use of foundation belongs to the exploration stage,while relying on the project,combining previous research methods and the actual project operation experience,mohe county north village in the greater hinggan mountains region research field sampling,the field test,the observation of ground temperature data,combined with the indoor test principle of permafrost region foundation,at the scene of the obtained samples,on the basis of a large number of tests have been carried out,including melt compression and grading test,and then the data processing,and integrated the principles of permafrost region foundation displacement,involving how to determine the methods to choose the replacement depth and soil,a good method for determining the grading of soil,the uneven coefficient and curvature coefficient can meet under the condition of maximum limit to determine the most suitable for filling. |
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