Study On Mechanism Of Heavy Haul Railway Subgrade Strengthening With Cement Soil Pile

Heavy haul railway is the development direction of national railway transportation,which plays a vital roal in today’s economic development. Along with the heavy haulrailway axis and velocity increasing, because of the early construction’s low standard, theexisting roadbeds’ diseases are gradually increasing, and the diseases also continue todeepen, which seriously restrict the heavy haul railway.This paper introduced the roadbed diseases’ mechanism of several commonphenomena and several existing roadbed reinforcement methods, but because of thework-load and busy transportation of heavy haul railway, therefore, in the premise ofuninterrupt the railways’ working, it is meaningful to study the rapid reinforcement ofheavy haul railway.This paper based on Third Railway Survey and Design Institute Group Corporation’skey project “Study on the application of reinforced cement-soil pile strengtheningtechnology of heavy haul railway”, which used the finite element analysis softwareABAQUS and Mohr－Coulomb constitutive model based on ideal elastic-plastic model,built the numerical model of reinforced cement-soil pile, and got the settlement and slopedeformation of roadbed through stengthening with cement-soil pile and changing reinforcedspace, length and material under different conditions, and analysised the stresscharacteristics of cement-soil pile, which showed the effective strengthening of reinforcedcement-soil pile, and it is an effective strengthening method under uninterrupt working.Finally, this paper showed the recommendation scheme under different conditions, which inorder to provide the reference design of reinforced cement-soil pile in the later.