Experimental Study On Snow Melting And Ice Melting Of Road Engineering By Geothermal Method

Geothermal melting snow is the use of shallow geothermal energy to melt snow on the road surface,which has the advantages of clean,pollution-free and energy-saving.At present,most of the research work at home and abroad is based on the geothermal simulation of concrete heat transfer,and the simulation analysis of temperature field,and the actual engineering research of geothermal application in concrete is less.In this paper,through the on-site outdoor test,the distribution characteristics of the geothermal snow melting ice temperature field and the snow melting effect are studied.The paper first introduces the experimental geothermal concrete road design and construction process,and then carries out a series of research on the melting snow technology based on ground source heat pump pavement: the variation of temperature of each characteristic point with time is analyzed;the buried pipe material is buried and studied.The influence of the flow rate of the circulating fluid on the temperature field of the road structure layer;under the actual snowfall conditions,the temperature variation characteristics and the surface area snow rate of the geothermal pavement structure layer were studied through outdoor tests.Through theoretical and experimental research,the following conclusions are obtained:(1)In the temperature drop test: the influence of the test duration on the accuracy of the test results is analyzed.The test test duration in this chapter is more than 8h.After the geothermal pipe road is formed,the buried pipe type has a large change in the temperature field of the geothermal road.In the comparative experimental study,it was found through analysis that when the No.1 tube was used,the temperature difference between the road structure layer and the outdoor temperature increased,the temperature drop increased,and the heat exchange efficiency was higher.(2)In the flow test: two different materials are buried in the road,and the flow test of different materials is carried out.The variation of the temperature of each layer under different flow rates is analyzed.The influence of the flow rate on the temperature of each layer of the road is studied.It indicates that the flow rate is set to 0.8,and the heat transfer property of the concrete structural layer is the best.(3)Under actual snowfall conditions: the temperature changes of each layer and the average temperature rise of each layer of the road after the temperature rise is stable;the outdoor temperature and the temperature of each layer in the road are analyzed;the snow cover of the road surface is collected and the snow is melted.And coverage information;analysis of the change in surface area snow rate and time.