悬挂式单轨道岔线型参数研究

Research on Turnout Alignment Parameters of Suspended Monorail

悬挂式单轨交通的轮轨关系、车辆悬挂方式及运行特点与传统轨道交通存在较大差异,为设计合理的道岔线型,根据悬挂式单轨技术特点、行车需求、车辆参数等,结合部分线路平面曲线参数研究成果以及铁路、地铁、跨座式单轨相关设计规定,研究确定悬挂式单轨道岔容许通过速度、侧线线型及侧线曲线半径、圆曲线及夹直线长度、转辙量及线间距等线型参数的计算或取值方法,在此基础上设计不同速度等级、曲线半径、线间距及夹直线长度的系列道岔线型方案。主要研究结论包括:(1)确定了道岔半径与未被平衡的横向加速度、车辆横向倾斜角的关系公式;(2)计算了不同速度下道岔半径的最小值,在满足车辆通过安全性的基础上,侧向速度分别为15,25 km/h时道岔半径可取为30,50 m,并反算出这两种半径道岔在载客、不载客工况下容许车辆通过的最大速度;(3)悬挂式单轨道岔的圆曲线及夹直线长度可不受车辆全轴距及转向架轴距限制,在具备条件时可作为参考指标。

The wheel-rail relationship, vehicle suspension mode and running characteristics of suspended monorail are quite different from those of traditional rail transit. In order to design a reasonable turnout alignment, this paper studies and determines the allowable passing speed, lateral alignment and the calculation or value method of the suspended monorail turnout alignment parameters, including radius of curve, length of circular curve and intermediate straight line, switch distance and line spacing according to the technical characteristics, traffic requirements, vehicle parameters of the suspension monorail with reference to some research results of plane curve parameters of some lines and the relevant design regulations in railway, subway and straddle monorail. On this basis, a series of turnout alignment schemes with different speed grades, curve radius, line spacing and intermediate straight line length are designed. The main findings include:(1) The relationship formula between the turnout radius and the unbalanced lateral acceleration and the lateral inclined angle of the vehicle is determined.(2) The minimum turnout radiuses at different speeds are calculated. On the basis of satisfying the safety of vehicle passage, the turnout radius should be 30 m and 50 m respectively when the lateral speed is 15 km/h and 25 km/h, and the maximum allowed crossing speeds of the two turnouts of different radius are calculated under the conditions of with and without passengers.(3) The length of the turnout curve and the intermediate straight line are not restricted by the full wheelbase of vehicle and the wheelbase of bogie, and they can be used as reference indexes when conditions are available.