Treatment method for ballastless track roadbed arching

Abstract

The invention relates to the field of railway roadbed engineering, in particular to a treatment method for a ballastless track roadbed arching disaster. The disaster is treated in the way that firstly, concrete of an arching section sealing layer on one side or two sides of a road shoulder is broken, a working groove is excavated downwards, and waterproof treatment is conducted on the groove bottom; then, foundation bed padding below a supporting layer is excavated, adjustable supporting devices are used for supporting after excavation is conducted, and a crossbeam and cushion blocks are arranged at the upper ends and the lower ends of the adjustable supporting devices; after excavation is finished, the elevation of track slabs is reduced through reduction of the height or the stroke of the adjustable supporting devices, then simple supports are used for replacing the adjustable supporting devices, and finally a packing material is poured; and the working groove is tamped and filled with graded broken stones layer by layer, and the sealing layer is repaired through concrete. The elevation of the track slabs is recovered to the original designed elevation, and the smoothness of a line is recovered. The provided method has the beneficial effects that construction is convenient and quick, economic cost is low, railway normal operation is not affected, and therefore 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 rectifying the arching disease of the railway ballastless track embankment. Background technique [0002] The railway ballastless track structure has very strict requirements on the deformation of the subgrade. Due to the complexity of the subgrade structure, there may be various deformation forms. The subgrade arching deformation of the ballastless track is one of them. The main reason is that the subgrade filler or foundation soil has a certain expansibility, and expansion and deformation occur after the water state of the subgrade and foundation changes, causing the track structure to arch. Usually, track fasteners have very little ability to adjust the upward arching deformation. Once the upward arching deformation occurs, it is usually necessary to limit the speed of the line, which has a great impact on the normal operation order. There are curren...

AI Technical Summary

Problems solved by technology

Usually, track fasteners have little ability to adjust the upward arching deformation. Once the upward arching deformation occurs, it is usually necessary to limit the speed of the line, which has a great impact on the normal operation order.

There are currently two methods for rectifying arching problems on ballastless tracks: one is to dismantle the original track structure and then refill the roadbed. This method will interrupt traffic for a long time and consume a lot of economic resources , the treatment cost is very high; the other is to use the track fastener adjustment method to deal with it, such as moving along the slope to both sides to adjust the rail surface elevation on both sides of the upper arch section, but the height range that can be adjusted by this method is limited, and the adjustment work large

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