高海拔隧道施工机械动力性能研究

On Power Performances of Tunnel Construction Machinery at High-altitude Area

为探究高海拔低氧环境对施工机械动力性能的影响,文章以运输类施工机械为研究对象,通过测算牵引力比功率研究海拔变化对施工机械的动力性能影响。同时,以牵引力比功率作为运输类施工机械的工作效率量化指标,建立海拔-施工机械工作效率降低系数回归模型以及海拔-施工机械台班消耗调整系数模型。研究结果表明:海拔越高,机械动力性能越差,海拔4200 m处较2800 m处牵引力比功率下降23%,机械工作效率下降23%;海拔越高,机械台班消耗越大,海拔4200 m处较2800 m处台班消耗量增大24%。

In order to explore the influence of high-altitude and low-oxygen environment on the power perfor⁃mances of construction machinery,the construction transportation machinery is taken as the studied object,and the influence of altitude change on the power performances of construction machinery is studied by measuring the trac⁃tion specific power.At the same time,traction specific power is used as a quantitative index of working efficiency of construction transportation machinery,and the regression model of altitude-working efficiency reduction coefficient of construction machinery and the regression model of altitude-consumption adjustment coefficient of construction machinery shift are established.The study results show that the higher the altitude is,the worse the power perfor⁃mance of machinery is.The traction specific power of construction machinery at 4200 masl(above sea level)is 23%lower than that at 2800 masl,and the working efficiency of machinery at 4200 masl is 23%lower than that at 2800 masl.The higher the altitude is,the greater the consumption of machinery shift is,and the consumption of machinery shift at 4200 masl is 24%higher than that at 2800 masl.