Study On The Method Of City Road Frothing Prevention In Cold Regions

Based on the question of road mud squeezing in domestic and foreign research status,study on the main causes and prevention measures of cold region city road frothing,obtain the different factors with road mud squeezing through the analysis and research.And simulation analysis of the factors who affecting road mud squeezing with FLAC 3D.Through the above analysis results obtain the engineering measures to prevent the road mud squeezing.As the research object of the permafrost thaw phenomenon makes the road mud squeezing in Northeast China.The above problems are analyzed by the variation of the soil type,moisture content,temperature and the load of vehicle.Modeling by finite difference software FLAC 3D,analyzed and contrast with above variation factors with the influence on road mud squeezing.Through the results of the analysis obtained at low temperature,frozen soil,water sensitivity is the main cause on road mud squeezing.The author combined with the practical engineering problems,several simple and feasible suggestions are put forward to prevention and improvement on the question of road mud squeezing:(1)Strengthening the ability of subgrade drainage.(2)Increasing the degree of compaction to improve the strength and stability of the roadbed.(3)Replacement with improvement soil on the road which has road mud squeezing.(4)Set up the isolation layer to prevent capillary water rise in the roadbed.(5)Improve the structure of the roadbed.