铁路超重车安全通过简支梁桥的运输条件

发布时间：2018-07-28 07:10

【摘要】：以限制超重车通过的主要桥梁种类——铁路简支梁桥为例,以超重车通过桥梁时的运行活载系数必须小于桥梁的检定承载系数为基本条件,通过调整装载方案、优化车辆编组及限制车辆运行速度3种运输组织措施,降低超重车的运行活载系数,分析各种运输组织措施应满足的要求并推导相关的计算公式。提出铁路超重车安全通过简支梁桥的运输条件:在满足装载基本技术条件的前提下,合理选择车辆并尽量减少货物重心的偏移,以降低超重程度;当超重车的长度小于桥梁跨度时,应使用隔离车将超重车与超重车或机车隔离;隔离车应选用轴距大、轴重小的车辆,并在超重车前后加挂同等数量的隔离车;应限制车辆运行速度,而且超重车重心的横向偏移量和纵向偏移量必须满足相关要求;若调整装载方案、优化车辆编组和限制车辆运行速度等运输组织措施均不能保证超重车安全通过桥梁,则应采取加固桥梁等其他方法。
[Abstract]:Taking the main type of bridge-railway simply supported girder bridge, which is the main type of bridge restricted by overweight car, as an example, taking the operating load coefficient of overweight car when passing through the bridge must be less than the check load coefficient of the bridge as the basic condition, the loading scheme is adjusted. Three kinds of transportation organization measures such as optimizing vehicle grouping and restricting vehicle running speed are optimized to reduce the operating load coefficient of overweight vehicle. The requirements of various transportation organization measures are analyzed and the relevant calculation formulas are deduced. It is put forward that the transportation condition of the railway overweight car passing through the simply supported beam bridge safely: under the premise of satisfying the basic technical conditions of loading, reasonably selecting the vehicle and reducing the deviation of the center of gravity of the cargo as far as possible, in order to reduce the degree of overweight; When the length of the overweight car is less than the span of the bridge, the overweight car should be isolated from the overweight car or locomotive by using the isolating car, and the vehicle with large wheelbase and small axle load should be used, and the same number of isolating vehicles should be added before and after the overweight car. The speed of the vehicle should be limited, and the lateral and longitudinal offsets of the center of gravity of the overweight vehicle must meet the relevant requirements; if the loading scheme is adjusted, Other methods such as strengthening the bridge should be taken if the transportation organization measures such as optimizing the group of vehicles and restricting the running speed of the vehicle can not guarantee the safety of the overweight vehicle passing through the bridge.
【作者单位】：北京交通大学交通运输学院;北京交通大学北京城市交通协同创新中心;
【基金】：铁道部科技研究开发计划项目(T08D0300)
【分类号】：U294.6;U298

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