Research On Prevention And Control Technology Of Ice And Snow Disaster Of Highway With Shallow Geothermal Energy

Snow and ice disasters of highway caused serious influence on transportationevery year. So far, the snow and ice disasters of roads have not good preventionmeasures. Shallow geothermal energy has the characteristics of huge reserves, cleanand renewable, Can be used as a new choice to prevent and control snow and icedisaster of the highway. In view of technology for prevention and control ice and snowdisaster of road with shallow geothermal energy, Based on in-depth and system studyof heat exchange technology of highway structures, roads, snowmelt model and roadsurface heat transfer process and temperature field, Road de-icing deicing system isestablished. Main content is as follows:1、Use of ground source heat pump (GSHP) combined with highway structurefoundation, heat exchange pipe layout and temperature field of the Bridge buried pipepile, tunnel buried pipe and subgrade base buried pipe are studied. Based ontechnology research of highway structures buried tube heat exchange, to realize theintegration of highway construction and shallow geothermal energy utilization.2、The key parameters of affecting road de-icing system design are analyzedand compared. On this basis, the model of Chapman, Kilkis model, Ramsey model,three kinds of classical melting snow load model is studied and analyzed. Combiningwith the characteristics of each model, considering the wind speed, ambienttemperature, relative humidity, snow speed factors, the snowmelt model convenient forhighway engineering practical application is put forward.3、In view of the asphalt concrete pavement, equipped with heat pipe surfacemodel equipped with heat pip established, the way the external and internal heattransfer process are analyzed. Combined with the boundary condition of highwaystructures, corresponding numerical model is established, considering the pipelineburied depth, fluid temperature and pipe spacing factors, this paper analyzes the factorsinfluence on pavement temperature and the relationship between road surfacetemperature and center distance of pipeline center is establish.4、Putting forward the structure of the ground source heat pump-snow meltingsystem framework, conducts a preliminary analysis on the working condition of eachsubsystem. Reference ground source heat pump system evaluation indexes in the fieldof building construction, preliminary evaluation is for highway ground source heat pump-snow melting system.5、Carries preliminary analysis of bridge pile foundation bearing capacity basedon the finite element analysis software. Setting up numerical model of bridge pilefoundation, compressive ability are compared between bridge of buried pipe pile andcommon pile foundation of bridge using ANSYS finite element analysis software. Bycomparing the ultimate compressive capacity, maximum displacement, equivalentstress，study the buried pipe pile pressure capacity and the compression load-bearingcharacteristics.