A track construction method for reserved column inspection pits in subway depots

Abstract

The invention relates to the technical field of rail construction, in particular to a metro depot reserved stand column inspection pit rail construction method. The method comprises the following steps: 1) concrete of a 500 mm reserved stand column below a rail surface is drilled away; 2) a steel rail fixed support frame and an symmetric inclined pull device are adopted to fix a steel rail on the stand column; a buckle is mounted according to the position of the stand column corresponding to the steel rail; and the rail row assembly and the steel rail connection are performed; c) the steel rail fixed support frame is used for geometric size adjustment and precision control of rail cant, gauge, direction, levelness and elevation rail states; and d) the concrete is cast after a reserved stand column temperature is mounted. The reserved stand column inspection pit rail construction adopts the self-made steel rail support frame and the symmetric inclined pull device to preferably fix the steel rail to guarantee geometric size adjustment and precision control of rail cant, gauge, direction, levelness and elevation so as to meet the design and specification requirements. The reserved stand column inspection pit rail construction method is simple, convenient in operation by constructors, economical and reasonable, and saves the cost.

Description

[technical field] [0001] The invention relates to the technical field of track construction, in particular to a track construction method for a column inspection pit reserved for a subway depot. [Background technique] [0002] At present, considering the long-term operation situation of the subway depot construction, the track will be reserved in the depot. Generally, the reserved columns of the track in the depot will be completed by the civil engineering construction unit. The main content of the reserved track in the depot includes system engineering installation, such as tracks, power supply, signal, etc. Columns are reserved in the column-type inspection tunnel bed in the warehouse, and the track will be laid in the later stage. Since the track line is divided into left and right strands, there are 2 reserved columns. The existing construction method mainly adopts drilling at the designed position on the top surface of the reserved column. The diameter of the hole is 4...

AI Technical Summary

Problems solved by technology

Due to the large error of the reserved columns in civil engineering construction, the concrete surface of the reserved columns is plastered with mortar and lime powder according to the design requirements. The nylon casing of the fixed fastener has insufficient pull-out resistance and the iron backing plate of the fastener exceeds the reserved top surface after installation. The rail is an important part of the track engineering structure, directly bears the load of the subway train, and transmits it to the fastener and the reserved top surface. On the column, because the quality of the pre-embedded casing of the fixed fastener with planting glue is not guaranteed on the reserved column, a large safety hazard will occur

The current construction method cannot meet the construction accuracy requirements of the reserved column inspection pit track

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