Midline deviation rectifying method for sedimentary offset ballastless track

Abstract

The invention discloses a midline deviation rectifying method for a sedimentary offset ballastless track. The midline deviation rectifying method comprises the following steps that (1) the uplifting quantity and the offset quantity of the sedimentary offset ballastless track line are determined; (2) the track structure characteristics are combined, a grouting uplifting hole is formed in the top surface of the ballastless track structure, and grouting uplifting material is injected into a ballastless track supporting layer or under a base plate through a grouting pipe installed in the grouting hole by adopting high-pressure grouting equipment under a certain grouting pressure according to the determined equipment parameters and the grouting steps, so that an overall ballast bed and the upper structure of the ballastless track are uplifted; (3) a jacking and pushing point is arranged on the side surface of the ballastless track structure, a jacking and pushing device is installed, and the ballastless track line is rectified to the designed position through the jacking and pushing process of grouping loading and jacking and pushing step by step; and (4) after the midline is rectified, the line recovery work is timely conducted, a lower gap of the overall ballast bed of the ballastless track is filled with a filling material, a fastener system is finely adjusted, and the line smoothness is recovered.

Description

technical field [0001] The invention belongs to the technical field of high-speed railway track structure disease control, and specifically refers to a centerline correction method for settlement offset ballastless track. Background technique [0002] The ballastless track structure uses high-rigidity concrete monolithic trackbed instead of the granular trackbed made of crushed stone ballast. It has the characteristics of smoothness, stability, durability, and less maintenance and repair work. It has become the main track of new high-speed railways Structure type. In order to ensure the safe and efficient operation of high-speed railways, my country has put forward strict requirements on the settlement and deformation of the foundation of the ballastless track structure, and has achieved remarkable results. However, ballastless track lines in my country are long and have large spans. When they pass through special sections, especially soft soil foundations, some ballastless...

AI Technical Summary

Problems solved by technology

The core of the ballastless track centerline deviation correction technology described in the patent "A Method for Correcting the Centerline Deviation of Settling Ballastless Track" (CN 104131499 B) is to set a curtain on the outside of the track, and grout the inside of the curtain to make the slurry Directional expansion, solidification and formation of lateral driving force under the action of curtain barrier to realize lateral correction of track structure to the other side. This technology has high requirements for curtain setting, and it is difficult and costly to implement on site, and it is not suitable for offset Center line deviation correction of ballastless track line with large quantity

The patent "A method for rectifying the deviation of ballastless track subgrade of high-speed railway in soft soil area" (CN 103821039 B) uses the method of compacting the soil with rotary grouting piles, and uses the instantaneous injection pressure generated by the construction of rotary grouting piles to push the ground on the high-speed railway The pile foundation reinforcement area at the bottom of the embankment produces displacement, and the pile foundation reinforcement area drives the foundation reinforcement cushion above the pile foundation reinforcement area and the high-speed railway embankment to move synchronously, realizing the deviation correction of the high-speed railway embankment. This method is only applicable to soft soil area, and the equipment required for construction is huge and the precision of construction control is low, so it is not suitable for rapid deviation correction within the skylight time

The patent "A device and method for raising and correcting deviation of CRTS I-type slab ballastless track on high-speed railway subgrade" (201510341806.1) installs lifting tooling on the base plate, and uses a hydraulic system to lift and translate the base plate and the upper track plate as a whole, but this In this method, multiple H-shaped longitudinal steel beams must be installed directly above the track structure, which requires huge mechanical equipment, and it is difficult to complete the deviation correction work within the skylight time

The patent "a method for correcting the center line of ballastless track in subgrade section" (CN 106049193 A) uses mechanical lifting devices such as jacks or air bags to loosen the gap between the integral ballast bed and the graded gravel, and then use the jack to push The device translates the bottom integral ballast bed. This method requires huge mechanical equipment, the operation process is cumbersome, and the construction efficiency is low.

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