Research Of Insulation Material And Insulation System Of Heat Injury Tunnel

This paper mainly discusses the Basic performance of high temperature tunnel insulating materials and analysis the change about temperature of the insulation system.In recent years, as the railway construction rapid development in western China, the development of tunnel construction to length and deep, variety of geological problems and environmental conditions more complex, the high-temperature geothermal water is a Special problems of construction and operation of the tunnel. From the research data, engineering has begun to pay attention to heat on the tunnel construction and engineering quality, but in general it has not targeted and effective technical measures.This paper according to the status of the heat injury tunnel at home and abroad Expand Research, as the Gaoligongshan heat injury tunnel of the Darui rail line subject background. Select a large number of insulation materials, and do the testing and research of basic performance for it, final choice of a reasonable heat insulation materials with the actual situation of the tunnel.Second, design and produce a simulated model of the tunnel structure type units. The model will test a variety of insulation materials. Comparative analyses will the test results and the results of heat conduction theory. We conclude that the test results Consistent with the theoretical results. It can get to this conclusion:In the premise of the material appropriate and reasonable construction, the program of additional layer of insulation material behind the second layer of concrete lining is feasible.Finally, designed a new type of construction technology of heat injury tunnel insulation, this new technology has not put into practical engineering use, it's reasonable should be consider. And prospects for further research.