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The good and bad of the engineering properties of subgrade filling fill roadbed quality . Demanding the construction of the Beijing-Shanghai high-speed railway roadbed filling quality , in order to strictly control the deformation of the high - speed railway roadbed , so that the future of high-speed railway with a solid foundation under rail , to meet the requirements of high-speed train running , \railway line bridge and tunnel station design Interim Provisions \However, according to the results of the survey has been conducted by the Beijing-Shanghai high-speed rail along the filler , filler along the Beijing-Shanghai line , qualified rarely completely rely far transported qualified fillers , not only is the economy , the actual implementation is impossible . The only possible way to make improvements failed filler , to reach the required standard of quality . This paper briefly describes the classification and compaction standard of the Beijing-Shanghai high-speed railway roadbed filler overview , as well as the world roadbed filler . On the basis of analysis of the development and status of the roadbed filler improved side from the physical and chemical studied the formation mechanism and characteristics of the improved soil strength and soil pore fluid composition on improved soil . Cement soil , lime soil , lime the indoor Experimental study of fly ash soil , including compaction test, liquid and plastic limit test , strength test , penetration test , compression test , anti - freeze-thaw cycle test , found through these tests improved soil changes in physical characteristics , and find out the incorporation of design standards to meet the Mix . Finally, the construction of QINSHEN verify the incorporation of material with the correctness of the ratio , rationality, summarized improved soil construction technology , the key processes , quality assurance measures for future high-speed railway roadbed filler improved accumulation some information .
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