Method for lifting end-beam-contained ballastless track structure under operation high-speed rail

Abstract

The invention provides a method for lifting an end-beam-contained ballastless track structure of an operating high-speed rail, and relates to the technical field of railway ballastless track structure repair, comprising the following steps: determining the lifting range and target lifting amount of the end-beam-contained ballastless track structure; a plurality of grouting lifting holes are formed right above the end beam of the ballastless track containing the end beam, armpit feet on the two sides and the ballastless track of the front section and the rear section adjacent to the end beam; meanwhile, grouting materials are injected into the grouting lifting holes in the end beam area, and the ballastless track with the lower end beam is lifted; and after the grouting lifting hole is lifted to the target lifting amount, the grouting lifting hole is densified, and a high-fluidity low-expansibility grouting material is injected to complete filling. According to the method, the grouting lifting holes are formed, so that the ballastless track structure with the lower end beam and large lifting resistance is lifted, the problems that the ballastless track structure with the lower end beam and the special track structure with the lower end beam are large in lifting difficulty and poor in precision control are solved, the stability of the lifted track structure can be guaranteed, and the remaintainability of follow-up sedimentation is reserved.

Description

technical field [0001] The invention belongs to the technical field of railway ballastless track structure repair, and in particular relates to a method for lifting the ballastless track structure with end beams under operating high-speed railways. Background technique [0002] In recent years, my country's high-speed railway has developed rapidly, and the operating mileage has exceeded 40,000 kilometers, which has greatly eased the pressure on my country's passenger traffic. In my country, high-speed railways are mainly based on the laying of ballastless track structures. The good integrity and smoothness of ballastless tracks ensure the high-speed, smooth and safe operation of trains, thus meeting people's requirements for fast and comfortable travel. However, the integrity of the ballastless track structure also limits the repairability of the line smoothness, that is, the line irregularity can only be repaired within the adjustable range allowed by the fastener system. ...

AI Technical Summary

Problems solved by technology

However, the integrity of the ballastless track structure also limits the repairability of track smoothness, that is, track irregularities can only be repaired within the allowable adjustable range of the fastener system

[0003] Due to complex geological conditions, regional uneven settlement, etc., the ballastless track in the embankment section of some operating lines has experienced large settlement, which greatly exceeds the adjustable range of the fastener system, and the geometric state of the track will be more difficult to repair. Directly affect the high-speed, safe and comfortable operation of trains

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