In order to accurately grasp the investment situation of tunnel construction ventilation cost and ensure the effective control of tunnel construction cost,based on the on-site construction of a tunnel,the air demand,pipeline resistance and fan configuration of two kinds of tunnels at different altitudes were calculated and analyzed,and the difference of railway project quota and base price caused by different configuration of tunnel fans was also analyzed.The difference of ventilation cost investment is described in detail,and the following conclusions are drawn:1)There is a large difference in the fan air supply between different tunnels,and the fan power difference is about 20％,so the input power of the fan should be calculated according to the actual situation in the field construction process and reasonable allocation of the fan;2)The difference of fan power and the difference of ventilation time between day and night lead to differences in the unit price and number of ventilation machinery shifts,and the increase of 820,180 yuan in the gas working area compared with the non-gas working area.3)With the increase of altitude,the increase of fan air supply volume is more significant,and the increase of ventilation cost of the two kinds of tunnels is 78.4％and 89.1％respectively,both of which have a large increase.Therefore,ventilation cost should be more strictly controlled during tunnel construction in the plateau area.
关键词
高海拔/瓦斯隧道/通风方案/工程造价
Key words
high altitude/gas tunnel/ventilation scheme/project cost
维普
万方数据