• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 20 Issue 4
Aug.  2007
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Article Contents
SU Qian, WANG Xun, LIU Shen. In-situ Test on Engineering Application of New Thermal-Insulation Materials in Qinghai-Tibet Railway Subgrade[J]. Journal of Southwest Jiaotong University, 2007, 20(4): 395-399.
Citation: SU Qian, WANG Xun, LIU Shen. In-situ Test on Engineering Application of New Thermal-Insulation Materials in Qinghai-Tibet Railway Subgrade[J]. Journal of Southwest Jiaotong University, 2007, 20(4): 395-399.

In-situ Test on Engineering Application of New Thermal-Insulation Materials in Qinghai-Tibet Railway Subgrade

  • Received Date: 15 Oct 2006
  • Publish Date: 25 Aug 2007
  • In order to investigate the engineering effect of expanded polystyrene(EPS) and expanded polyurethane(PU),an in-situ test was performed for permafrost subgrade on the Qinghai-Tibet railway.The results indicate that both the materials have a good thermal-insulation property,and the PU is better than the EPS.The relationship between thermal-insulation capability and material thickness is nonlinear.Compared with the non-insulation sections,the annual ground temperature of the thermal-insulation embankment is decreased,the permafrost table is raised,and so the permafrost is protected well.A dynamic test shows that the thermal-insulation subgrade can satisfy the needs of running security and comfort of trains at a speed of 100 km/h.

     

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