Alignment Control and Adjustment Technologies for Ballastless Track of Long-span Arch Bridges
A railway continuous girder arch bridge with a main span of 180 m crossing a navigable river,due to reasons such as locking the rail sleeper elevation before pouring the track bed plate,pouring the three wall project in the later part,and not retesting the CPⅢ measurement point on the girder surface after the construction of the base plate,the final rail surface alignment was lower than the design value.In order to solve the problems of high cost,waste engineering,environmental pollution,and long construction period of re-laying the track after removing the slab,a method of adjusting the rail surface alignment by adjusting the suspension force was proposed.This method compensates for the shortcomings of re-laying the track.The technical difficulty of this method is high.During implementation,the linear relationship between the bridge alignment and the suspension force is accurately calculated based on the actual situation on site.The structure is subjected to force safety analysis.Magnetic flux sensors,jacks,and other equipment are used to monitor and control the suspender force and alignment on site.On the basis of structural safety,precise control of the track plane alignment is achieved.
continuous girder arch bridgetrack surface alignmentdouble-block tracksuspender forceconstruction monitoringalignment control
万方数据
维普
