Subway turnout zone monolithic track bed settlement regulation method

Abstract

The invention discloses a subway turnout zone monolithic track bed settlement renovation method. The method comprises the steps that the settlement situation of a settlement zone and a track bed within a certain adjacent length range is monitored in real time; a settlement threshold value is set, when the ballast bed settlement amount exceeds a certain value, automatic real-time monitoring and early warning are conducted, and temporary adjustment and temporary reinforcement of ballast bed settlement are conducted when ballast bed settlement is not stable; and after the ballast bed is settled stably, a permanent renovating and repairing technology is adopted for comprehensively renovating the turnout monolithic ballast bed after settlement stabilization. The geometrical shape and position of the turnout in the settlement period are temporarily adjusted, so that the geometrical shape and position of the turnout meet the safe driving requirement; through temporary reinforcing measures ofthe gauge pull rod steel frames and the steel joists, the gauge keeping capacity and the integrity of the ballast bed are enhanced; and aiming at different situations of a ballast bed after settlementstabilization, the turnout monolithic ballast bed after settlement stabilization is comprehensively renovated by a separate grouting repair technology, a mechanical lifting and grouting repair technology and a permanent renovation repair technology of chiseling off a turnout sleeper and repouring a concrete platform.

Description

technical field [0001] The invention relates to the field of rail transit, in particular to a method for regulating the settlement of an integral track bed in a turnout area of ​​a subway. Background technique [0002] The integral ballast bed of subway tunnel has the advantages of stable operation, uniform rigidity, strong durability and small maintenance engineering, and is widely used in urban rail transit in my country. The operation shows that the overall condition of the subway track bed is good. However, due to the complex geological conditions of some lines, poor quality control of the construction process, cross-engineering construction, groundwater and other reasons, the overall track bed in some sections of some lines has subsidence to varying degrees. subsidence disease of subway track bed. The sinking of the track bed will affect the smooth operation of the train, and even endanger the driving safety in severe cases. As the weak link of the line, the turnout i...

AI Technical Summary

Problems solved by technology

[0008] In order to control the settlement disease of the ballast bed, the above existing inventions mainly applied for related inventions from various angles of the grouting method, but there are still certain deficiencies. For example, the commonly used grouting construction is all constructed in the water ditch and side ditch. There is a lack of targeted measures for the sections where the settlement of the ballast bed directly affects the unevenness of the rails, and there is also a lack of temporary reinforcement and transitional treatment measures for different situations and a single treatment method.

Under normal circumstances, the differential settlement of the civil foundation in the turnout area will lead to the deformation of the track structure in the turnout area. This kind of change in the geometric shape of the track due to the settlement of the civil structure must first renovate the civil structure. After the deformation of the civil structure converges, Then carry out the final renovation of the track structure, such as using the grouting method, and the above-mentioned renovation technology often needs to be dealt with after the settlement of the lower foundation is stable; but the actual situation on site is often that during or after the renovation of the civil structure. In some areas, the settlement of the lower foundation has not been stabilized or the track geometry in the turnout area continues to exceed the limit during the settlement process. The final improvement measures for the track structure cannot be carried out, but it has already had a huge impact on the safety of traffic. Therefore, some temporary reinforcement transition measures are needed to control the geometric shape of the track structure and ensure the safety of driving.

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