Study On The Technology Of Energy Conservation By Using Natural Wind Of Liupan Mountain Tunnel

At present, about the calculation method of natural wind pressure and use of natural ventilation to saving energy in highway tunnel has a thorough research, But in some of the details are not specific.For example,In the calculation of wind pressure,which caused by natural wind near the tunnel portal, How to determine the value of wind pressure coefficientis is still lack of relevant research.In this thesis, the calculation method of natural wind pressure and use of natural ventilation to saving energy in highway tunnel will be studied based on the project of 9.5 km long Liupan mountain extra-long high-way tunnel. The main research work is as follows:First of all, The calculation method of wind pressure on each influencing factors are studied to Analysis the deficiencies in each formula. On this basis, The variation of wind pressure coefficientis with natural wind and the angle of solpe through the method of laboratory test and theoretical derivation to get the value table of wind pressure coefficientis,then, the reasonable value of wind pressure coefficientis to each tunnel portal is determined According to the actual situation of Liupan mountain tunnel.On the combination of reasonable value of wind pressure coefficientis to each tunnel portal and the stduies of calculation method of natural wind to Liupan mountain tunnel,The natual wind formula uitable for Liupan mountain tunnel is finally determined. In order to verify the results of Liupan mountain natural wind calculation formula are correct, The natural wind conditions in the tunnel were measured,After the tunnel is transfixed.Secondly, establish 4 long-term meteorological data monitoring station to get meteorological data around Liupan mountai tunnel.With the programming calculation method and the combination of Liupan mountain tunnel meteorological data and calculation formula,obtain in-tunnel natural wind data.Then, analysis the calculation result To get the in-tunnel natural wind distribution and variation of Liupan mountain tunnel.Thirdly, Study on the method of determining the natural wind speed design, and analysis the advantages and disadvantages of various methods.On the foundation of analysis result,a new design method of in-tunnel natural wind speed,which Contains the distribution law of natural wind,is put forward.Finally, Combining the ventilation equipment and natural wind distribution law in Liupan mountain tunnel,get the technology of energy conservation by using natural wind in tunnel.Through the research, the calculation method of in-tunnel natural wind and the design method of in-tunnel natural wind speed are improved. The research results can be used as reference for tunnel ventilation design.