一种新型无砟轨道轨行区集成线缆管廊研究

Research on a New Type of Integrated Cable Pipe Corridor in Track Area of Ballastless Track

研究目的:随着城市轨道交通的蓬勃发展,从环保、施工、维养等因素出发,研制出一种敷设于无砟轨道[1]轨行区的新型集成线缆管廊,做到标准化、工厂化、经济、环保、适用,同时兼作检修通道和疏散平台,优化以往常规下埋路基或路基外侧敷设的施工方案,降低施工难度、节约用地、节省投资。研究结论:(1)该新型集成线缆管廊可布设于城市轨道交通轨行区左、中、右区域;(2)根据受力分析,该新型集成线缆管廊可兼作检修通道和疏散平台;(3)经对比计算分析,管廊材料采用C50混凝土时,拉应力逼近规范限值,而采用高性能混凝土(RPC)时,应力值更为合理,该新型集成线缆管廊材料采用高性能混凝土(RPC)可行;(4)该成果可用于高铁、城际铁路、城市轨道交通等无砟轨道轨行区强弱电线缆的敷设。

Research purposes: With the rapid development of urban rail transit,from the environmental protection,construction,maintenance and other factors,a new type of integrated cable pipe corridor laid in the track area of ballastless track is developed with the characteristics of standardization,factory production,economy,environmental protection and application. It also serves as a maintenance channel and evacuation platform. It optimizes the conventional construction scheme by laying strong and weak electric cables under subgrade or laying the cables outside the subgrade,reducing the construction difficulty,saving land,and saving investment.Research conclusions:( 1) This new type of integrated cable pipe corridor can be arranged in the left,middle and right areas of track area of urban rail transit.( 2) According to force analysis,the new type of integrated cable pipe corridor can serve as maintenance channel and evacuation platform.( 3) Through comparative calculation and analysis,when C50 concrete is used for pipe corridor material,the tensile stress approaches the limit of the specification. However,the stress value is more reasonable when high performance concrete( RPC) is used. It is feasible to adopt high performance concrete( RPC) as the new integrated cable pipe corridor material.( 4) The research results can be used for laying the strong and weak electric cables in the track area of ballastless track for high-speed railway,intercity railway and urban rail transit.