Study on Lime Improved Expansive Soil Filling in Hefei-Nanjing Passenger Dedicated Line

In order to solve the problem that moderate weak expansive oil along Hefei-Nanjing Passenger Dedicated Line cannot be directly used as subgrade filling for expansion in water and shrinkage out of water,this paper studies the construction technology for expansive soil filled subgrade combined with Hefei-Nanjing Passenger Dedicated Line engineering.It is indicated from post-construction settlement analysis that the construction technology with lime improved expansive soil as subgrade filling can satisfy each index and requirement of the subgrade of passenger dedicated line.