Method for lifting railway roadbed with settlement diseases

Abstract

The invention discloses a method for lifting a railway roadbed with settlement diseases. The method for lifting the railway roadbed with the settlement diseases comprises the steps of S1, drilling holes and positioning; S2, unlocking fasteners; S3, carrying out rotary jet grouting: starting horizontal rotary jet grouting equipment, horizontally drilling forwards along the drilling position, and stopping rotary jet grouting when a drill bit has a distance of 1-2 m from an opposite side slope surface; enabling the drill bit to gradually exit in a reverse direction and carrying out rotary jet grouting of a quick-setting material; stopping grouting when the rotary jet grouting drill bit moves back to a position with a distance of 1.5 m from the surface of a side slope; and continuing to reversely rotate the drill bit till the drill bit completely exits a roadbed body so as to finish the making of a horizontal rotary jet grouting pile; and S4, moving rotary jet grouting pile equipment to the next pile position; and repeating the process till all lifting works of a railway roadbed settlement superstandard section are finished. According to the method for lifting the railway roadbed withthe settlement diseases, a foundation bed structure and a track structure above the rotary jet grouting pile are integrally lifted under a condition of not affecting the normal operation of railway sothat the operation space utilization efficiency is enhanced and the online operation amount is reduced; and the lifting effect of the roadbed with superstandard settlement is controllable, efficient,energy-saving, environmentally friendly and cost-effective.

Description

technical field [0001] The invention belongs to the technical field of railway subgrade maintenance and repair, and in particular relates to a method for lifting a subsidence diseased railway subgrade. Background technique [0002] As of the end of 2016, the total operating mileage of national railways has reached 120,000 kilometers, of which the operating mileage of high-speed railways has reached 19,000 kilometers, which also marks that my country's railway construction and operation have reached a new stage. With the large-scale construction and operation of my country's railways, various railway diseases and maintenance problems have always been the key to the construction and development of my country's railways. Among them, the problem of settlement diseases in the process of railway operation is particularly prominent. In order to ensure the safety of my country's railway operations, the smoothness of the track is relatively high, and the operating railways are also v...

AI Technical Summary

Problems solved by technology

[0003] At present, in view of the unevenness of the railway line caused by post-construction settlement, there are mainly the following maintenance methods under the condition of uninterrupted traffic: First, the method of adjusting the fastener or increasing the adjustable amount of the fastener is adopted. To a certain extent, the smoothness of the track structure can be restored, but the overall adjustment amount is relatively limited, and there is a limit to the adjustment range of the fasteners; second, for the ballasted track, the new ballast method of the ballast bed is adopted, which is relatively economical for the ballasted track High efficiency, but for the case of relatively poor subgrade bed filling, large-scale ballast replacement is still not enough to control subgrade settlement, resulting in excessive ballast filling to form ballast pockets; third, for ballastless tracks, use track slab polymer Grouting method, the track slab is lifted by tooling equipment, and the fast-hardening polymer is filled between the track slab and the concrete bed to restore the smoothness of the ballastless track. This method requires a high level of polymer grouting construction , and the final uplift generally does not exceed 100-200mm, and its effect cannot be reflected in areas where the settlement seriously exceeds the standard

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