Lb1B4701.带缓和曲线的圆曲线曲线长的计算公式为Ɩ=R(α-2β₀)×π/180°+2Ɩ₀,缓和曲线总切线角公式为β₀=180°Ɩ₀/2πR,若R=300m,Ɩ₀=30m,α=20°10′20″,则Ɩ为136.678m。( )
A.正确 B.错误正确答案B
Lb1B4701.带缓和曲线的圆曲线曲线长的计算公式为Ɩ=R(α-2β₀)×π/180°+2Ɩ₀,缓和曲线总切线角公式为β₀=180°Ɩ₀/2πR,若R=300m,Ɩ₀=30m,α=20°10′20″,则Ɩ为136.678m。( )
A.正确 B.错误正确答案B