一、问题的提出设计曲线地段的线路坡度时,必须计算曲线附加阻力的折算坡度。在非隧道地段,线路设计坡度i与曲线附加阻力折算坡度i_r之和不得超过限制坡度值i_x(在多机加力牵引地段,不得超过加力坡度值i_(x,j)),以保证列车在该坡段上的运行速度不低于规定的计算速度V_j。 First, the issue put forward design curve section of the line slope, the curve must calculate the additional resistance of the conversion slope. In the non-tunnel section, the sum of the line design gradient i and the curve additional resistance gradient i_r shall not exceed the limit gradient value i_x (the value of force gradient value i_ (x, j) The running speed on the slope is not lower than the prescribed calculation speed V_j.