摘要
Dynamic performance of insulation is one of the key parameters during the insulation application for high-speed railway subgrade. This paper conducted laboratory and field tests for the materials and dynamic load, especially for thermal performance, elastic deformation, and accumulated deformation of insulation materials. Experiment results show that mechanical properties of insulation layer structure are stable, which satisfies the requirements of the high speed railway.
Dynamic performance of insulation is one of the key parameters during the insulation application for high-speed railway subgrade. This paper conducted laboratory and field tests for the materials and dynamic load, especially for thermal performance, elastic deformation, and accumulated deformation of insulation materials. Experiment results show that mechanical properties of insulation layer structure are stable, which satisfies the requirements of the high speed railway.
基金
supported by the China Railways Corporation research project entitled "The technical tests for the high speed railway subgrade frost heave prevention in the alpine" (Project No. Z2013-038)
"The long term observation of frost-heave technology for Ha-Da high-speed railway during the operation" (Project No. Z2012-062)
"Optimal design for high-speed railway subgrade structure under different grade and environment" (Project No. 2014G003-A)
the railway scientific and technological research and development center called "The mechanism and evolution rule of the graded gravel under freeze and thawing cycles for the high speed railway" (Project No. J2014G003)
"The disease control technology and equipment of gradating gravel in surface layer of subgrade bed" (Project No. 2013YJ032)
