System and method for high-speed railway subgrade settlement restoration

Abstract

The invention discloses a system and method for high-speed railway subgrade settlement restoration. The system comprises at least eight lifting components, at least eight hydraulic lifting devices, a hydraulic distribution device, an automatic control system and a grouting device, wherein the at least eight lifting components are arranged at preset lifting points on a base plate, and every lifting component comprises a connecting part and a lifting part; every hydraulic lifting device is arranged between a high-speed railway subgrade and the lifting part of the lifting component; the hydraulic distribution device is connected with every hydraulic lifting device through hydraulic pipelines; the automatic control system controls the hydraulic distribution device to provide preset hydraulic pressure for every hydraulic lifting device so as to lift the base plate to a preset height of the high-speed railway subgrade; and the grouting device pours slurry in gaps formed between the base plate and the high-speed railway subgrade through slurry pipelines so as to support the base plate after the slurry is solidified. The invention further provides a method for track plate and base plate integrated lifting type high-speed railway subgrade settlement restoration.

Description

technical field [0001] The invention relates to a railway embankment repair system and method, in particular to a high-speed railway embankment repair system and method. Background technique [0002] After years of high-speed railway construction, my country has built the world's largest high-speed railway network. Slab ballastless track is generally used in high-speed railways, which is a kind of track composed of cast-in-place cement concrete support layer, cement emulsified asphalt mortar layer, prefabricated concrete track slab, inter-slab connectors, rails and fasteners on the subgrade. New track structure. Compared with the traditional ballasted track, since the ballastless track cancels sleepers and ballast beds, and uses prefabricated reinforced concrete slabs to directly support the rails, it has the following advantages: good stability and smoothness; low building height and light weight, which can reduce bridge The second phase load and reduce the tunnel clearan...

AI Technical Summary

Problems solved by technology

However, the maintenance method of the I-type slab ballastless track has the following disadvantages and deficiencies: (1), according to the different structural forms, the high-speed rail track slabs can be divided into CRTS-Ⅰ, Ⅱ and Ⅲ types, and some slab-type track slabs There is a mortar layer separation between it and the base plate, and some do not. For the plate type with separation, the track plate can be lifted separately, and the track plate cannot be lifted separately without separation; (2), the track plate is lifted separately, and the track plate is raised The mortar layer between the base plate and the base plate is easy to be backfilled and not dense, resulting in a new separation layer, which will have an adverse effect on the smoothness of the high-speed rail line; (3), directly use the jack to lift the track plate alone, not revealed / recommended Any auxiliary or protective devices / measures, which will force the track slab to produce stress deformation, or even damage; (4), does not reveal / suggest how to apply lifting force to avoid track slab deformation / damage

However, this ballastless track railway bridge-road joint differential settlement adjustment device has the following disadvantages and deficiencies: (1), a large number of hydraulic jacks and grouting pipes need to be permanently pre-buried, which will undoubtedly greatly increase the construction cost of the high-speed railway, and also It is not applicable to the maintenance of the high-speed rail after completion; (2), the uplift is limited to the joint between the bridge and the roadbed, and the scale and use of the uplift are small; (3), after the high-speed rail has been built for many years, when settlement adjustment is required, there is no guarantee The buried hydraulic jacks and grouting pipes can still work normally. If any one of the hydraulic jacks or grouting pipes is damaged, the entire set of buried devices will be scrapped, which will undoubtedly cause a huge waste of resources; (4) It is not disclosed / recommended to use any auxiliary or protective devices / measures during lifting, which will force the concrete support layer to undergo stress deformation or even damage; (5), it is not disclosed / recommended how to apply lifting force to avoid concrete support Layer deformation / breakage

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