Center line deviation rectifying method for ballastless track of high-speed railway of roadbed segment

Abstract

The invention provides a center line deviation rectifying method for a ballastless track of a high-speed railway of a roadbed segment. The method includes the following steps that the center line deviation amount and settling amount of a ballastless track line are measured; measured data are analyzed, and in combination of the track structure characteristics, lifting points and jacking points are arranged at the lower portion and the side face of a whole roadbed of a ballastless track structure; lifting devices are installed on the lifting points, the whole roadbed of the ballastless track and an upper structure are finely lifted, after an interface between the whole roadbed and graded gravel is jacked to be loosened, the lifting devices are unloaded, and the whole roadbed falls back; jacking devices are installed on the jacking points, and through grouped loading and level-by-level jacking, the ballastless track line is rectified to a designed position; and after line center line deviation rectification is finished, line restoration operation is conducted, a gap in the lower portion of the whole roadbed of the ballastless track is filled with polymer cement mortar, and line smoothness is restored through a fine adjustment fastener system. By the adoption of the method, the problem of center line deviation of the ballastless track line of the roadbed segment can be safely, rapidly and effectively solved within a skylight time, and line smoothness is restored.

Description

technical field [0001] The invention belongs to the technical field of repairing ballastless tracks of high-speed railways, and in particular relates to a center line correction method for ballastless tracks of high-speed railways in subgrade sections. Background technique [0002] Ballastless track has the advantages of good smoothness, stability and durability, and less maintenance work, and has become the main track structure type of high-speed railways today. In order to ensure the safe and efficient operation of high-speed railways, my country has put forward strict requirements on the construction quality and control accuracy of the ballastless track structure, as well as the settlement and deformation of the foundation under the line after construction, and has achieved remarkable results. . However, my country's ballastless track line is long and spans a large area. When the ballastless track line passes through a special section, especially a soft soil foundation se...

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Problems solved by technology

For industrial and civil buildings, the correction method is mainly the forced landing method and the jacking method, such as the method of correcting the deviation of the building with negative pore pressure drilling and excavating soil (201310691935.4). The foundation is reinforced, and then the deviation is rectified by digging soil and other measures. During the correction process, a part of the building elevation will be lost. This method is greatly affected by the geological conditions around the building, and the construction control accuracy is poor; the patent "a kind of building jacking Deviation Correction Method” (201210049116.5) The jacking and deviation correction method requires large construction machinery, long operation time, and many construction workers, which is not conducive to on-site organization and management; At a certain distance outside the offset direction of the building, a certain number of jet grouting piles are formed by high-pressure jet spraying, and then a certain number of jet jetting piles are formed close to the position of the building, and several rows of jet jetting piles are formed in turn, and then through compacting jet jetting Spray the soil between the pile and the building to correct the deviation of the building. This method requires huge mechanical equipment, a large amount of materials, and low construction control accuracy. It is also not suitable for the center line of the ballastless track line during the skylight time. safe and fast correction

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