现代有轨电车路基不均匀沉降标准研究

Differential Settlement Criteria of Modern Tram Subgrade

比较了国内外现代有轨电车乘车舒适性,给出了相应的建议值,按照行车舒适性准则确定了路基沉降后,轨面新增竖曲线及竖曲线半径减小两种情况下,20 m线路长度范围内轨面高差ΔS值,采用扣件调高量+ΔS作为路基不均匀沉降标准,以降低工程投资。待运营经验积累后,可用实际最大运营速度来代替设计速度确定ΔS值,舒适性标准也可作进一步放宽。

The recommended value for passenger comfort is given based on a comparison between domestic and overseas tram criterion. When the vertical curve is added or the vertical curve radius is reduced, the settlement of subgrade is determined according to the driving comfort standard, and the track elevation difference ΔS in 20 m is calculated. The value of track fastener adjustment range + ΔS is taken as subgrade differential settlement criteria to reduce the construction cost. After the accumulation of operation experiences, the actual maximum operation speed can be used to calculate the ΔS in replace of the designed speed, and passenger comfort criterion can also be further relaxed.