Study on the Roadbed Construction of High Liquid Limit Soil Improvement Application
In some areas where the roadbed filling resources are scarce and special soil such as high liquid limit soil is widely distributed,the high liquid limit soil is improved to meet the requirements of roadbed filling.Taking the contract TJ1 roadbed engineering of Wushi County Branch of Zhanjiang-Xuzhou Expressway as a practical example,this paper compares and analyzes several improvement projects of high liquid limit soil,considering economic efficiency and some indexes such as liquid limit,plastic limit,CBR value,and deflection value,and finalizes the project that the volume ratio between the breakstone and the high liquid limit soil is 3 to 7.Moreover,in this project,the mixture is mixed by means of the road-mixing method,ground and sealed the top by using two kinds of non-woven fabrics,one kind of plastic membrane and stone chips,causing full-section seal of roadbed top of high liquid limit soil.Through various data analysis,operability and economic efficiency of reforming roadbed of high liquid limit soil are verified,thus providing reference for similar engineering design and construction.
improvement of high liquid limit soilcomparative analysiscraft of road-mixing methodeconomic benefit
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