Repair method for high-speed railway roadbed arching deformation

Abstract

The invention relates to the field of railway roadbed engineering, in particular to a repair method for high-speed railway roadbed arching deformation. A working groove / working grooves meeting the drilling machine drilling operation requirement is / are excavated in one side / two sides of an arching section roadbed; then holes are transversely drilled in the arching section roadbed range, and round pipes with the diameter equivalent to the hole diameter are inserted in the drilling process; along with the increase of the number of the drilled holes, the up-down contact area of a soil body of a layer where the drilled holes are located is reduced, soil body stress concentration is generated, the portions, around the hole walls, of the soil body are squeezed into or collapse into the drilled holes, and roadbed settlement is generated; then, the mode that small-diameter round pipes are used for gradually replacing the large-diameter round pipes is adopted for guaranteeing that roadbed settlement deformation is in a controllable range, and the round pipes inserted in the drilled holes at the last time are used as grouting pipes; after the settlement deformation generated by the roadbed drives the rail surface elevation to reduce to a target value, the drilled holes are filled with cement paste or cement mortar through the grouting pipes; and finally the working groove / working groovesis / are backfilled. By the adoption of the method, construction is convenient and quick, cost is low, normal operation of a railway is not affected, and the method is more practical.

Description

technical field [0001] The invention relates to the field of railway embankment engineering, in particular to a method for repairing arch deformation of a high-speed railway embankment. Background technique [0002] The high-speed railways currently in operation are close to hundreds of thousands of kilometers. The complex geological conditions and the huge difference in the natural environment along the lines make the high-speed railways often face various unfavorable factors. In particular, the complexity of the roadbed materials is easily affected by external influences. The arching deformation of the subgrade of the high-speed railway track is one of them. The main reason is that the subgrade filling soil has a certain expansibility, and expansion deformation occurs after the water state of the subgrade changes, causing the track structure to arch. There are currently two methods for rectifying the arch deformation of high-speed railway subgrades: one is to remove the or...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of complex construction and high economic cost in the existing method for rectifying the arching deformation of the high-speed railway embankment, and provide a repair method for the arching deformation of the high-speed railway embankment with a new structure. The technical problem is to make it convenient for construction, low economic cost, and not affect the normal operation of the railway, so it is more practical

[0005] Another purpose of the present invention is to provide a novel structure repair method for arching deformation of high-speed railway embankment. control, which solves the disadvantages of the existing renovation methods that have a great impact on the track structure and high safety risks, so it is innovative

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