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研究目的:由广东省单独投资建设并负责运营管理的珠江三角洲地区城际轨道交通网,运行车辆选用与地铁A型车外形尺寸相同的城际动车组,但运行速度大大高于一般地铁,现行有关轨道交通方面的设计规范均不能完全适用于珠三角城际轨道交通项目。为了使工程设计既能实现运营速度目标,保证运营安全,又尽量节省工程投资,因此需要对珠三角城际轨道交通正线线间距进行研究确定。研究结论:珠三角城际轨道交通正线直线地段最小线间距可按下列标准采用:设计速度为140km/h及以下时采用3.8m,160km/h时采用4.0m,200km/h时采用4.2m。曲线两端直线地段的线间距为3.8m时,曲线地段应加宽线间距;曲线两端直线地段的线间距≥4m时,曲线地段线间距可不再加宽。
Research purposes: The inter-city rail transit network in the Pearl River Delta, which is solely invested by Guangdong Province and operated for operation and management, selects the intercity EMU with the same external dimensions as the A-type subway vehicles, but its operating speed is much higher than that of ordinary metro lines. The design norms in respect of rail transport can not be fully applied to the PRD inter-city rail transport project. In order to make engineering design not only achieve the goal of operating speed, ensure operational safety, but also save engineering investment as much as possible, it is necessary to study and determine the line spacing of inter-city rail transit in the Pearl River Delta. Research conclusions: The minimum line spacing of the straight line on the main line of intercity rail transit in PRD can be adopted according to the following standards: 3.8m for design speed of 140km / h and below, 4.0m for 160km / h and 4.2m for 200km / h . When the line spacing between the straight line segments at both ends of the curve is 3.8m, the line spacing should be widened in the curve segment. When the line spacing of the straight line segments at both ends of the curve is ≥4m, the line spacing between the curve segments can no longer be widened.