200km/h和250km/h设计速度下的高速铁路无轨恒张力架设供电接触线施工技术

Trackless Constant Tension Overhead Line Installation Technology for High-speed Railway with Design Speeds of 200 km/h and 250 km/h

目的:高速铁路通常采用恒张力轨行车进行供电接触线架设,为解决恒张力架设接触线与施工单位占用轨道资源的冲突,以及架设接触线时占用站前施工单位铺设到位的钢轨的问题,特进行本研究。方法:在现有有轨恒张力架设接触线设备机械原理的基础上,结合高铁现场施工实际情况,与厂家共同研发了一套新型架设接触线车组。该车组主要由张力机、牵引机和液压放线架3个部分组成。液压张力机每组放线卷筒张力为0~40 kN(单卷筒)或0~80 kN(双卷筒),最大放线速度为5.0 km/h,并可实现无级变速;液压牵引机额定牵引力为35 kN,此时牵引速度为2.5 km/h,最大架设接触线速度为5.0 km/h,相对应的牵引力为20 kN。结果及结论:新型架设接触线车组性能指标满足高铁接触线恒张力架设要求。通过研发的该高铁无轨恒张力架设装置,架设接触线时不再需要利用已铺架的钢轨,摆脱了对站前施工单位铺轨进度的制约,也无需与站前施工单位争夺占用轨道的时间和资源,极大地缓解了工期紧张情况下导致的架设接触线作业进度滞后的难题。在联调联试期间采用无轨恒张力架设接触线设备所架设的锚段,其各项检测数据满足验收标准,开通运营后动态检测设备状态良好。

Objective:High-speed railway usually adopts constant tension rail cars for power supply overhead line installation.The research is specificallt carried out to tackle the track resource usage conflict between constant tension overhead contact line installation and construction unit,and the problem of overhead line installation occupying the steel rails laid in place pre-station by the construction unit.Method:Based on the mechanical principles of the existing track constant tension OLI equipment and in combination with the actual high-speed railway construction site situation,a new type of vehicle set for high-speed railway trackless constant tension OLI is jointly developed with the manufacturer.The vehicle set is mainly composed of three parts:tension machine,traction machine,and hydraulic pay-off rack.The hydraulic tension machine has a tension of 0-40 kN(single reel)or 0-80 kN(double reel)for each group of pay-off reels,and the maximum pay-off speed is 5 km/h,which can achieve stepless speed regulation;the rated traction force of the hydraulic traction machine is 35 kN,and the corresponding traction speed is 2.5 km/h,the maximum OLI speed is 5 km/h with a corresponding traction force of 20 kN.Result&Conclusion:The performance indicators of this new type OLI vehicle set meet the high-speed overhead line constant tension installation requirements;through the development of this high-speed railway trackless constant tension installation device,laid rails are no longer needed for OLI,thus the constraints on rail laying progress at station front is eliminated for construction units,and competition for station front rail occupation time and resource becomes irrelevant,greatly alleviating the problem of delayed OLI work progress in case of tight construction periods.During joint commissioning and test,the various inspection data of the anchor section installed by trackless constant tension OLI equipment meet the acceptance standards,and dynamic test shows good equipment status after launching.