Line temporary overhead device and method for ballastless track disease treatment

Abstract

The invention relates to a line temporary overhead device and method for ballastless track disease treatment, belonging to the technical field of railway ballastless track disease elimination. The temporary overhead device comprises a steel cushion beam, a support, a limiting device and a fastener. The longitudinal beam of the steel cushion beam is welded with a steel plate and has a box section.The upper flange of the longitudinal beam is provided with a plurality of fasteners for locking the rail and the longitudinal beam. The two ends of the longitudinal beam are also supported on the railconcrete support layer through bearings respectively. The connection between the longitudinal beam and the support is provided with a finite position device A. The joint of the longitudinal beam, thefirst small cross beam and the last small cross beam is respectively provided with a finite position device B. The line temporary overhead device for ballastless track disease treatment improves theintegrity and construction convenience of the overhead structure, and enables the overhead device to realize the adjustment of the vertical and lateral positions, and a plurality of overhead devices can be connected with each other, and the overhead line can be formed by adopting the combination of a plurality of devices for the lines with a long disease treatment range.

Description

technical field [0001] The invention relates to a temporary overhead device and a method for controlling ballastless track diseases, and belongs to the technical field of railway ballastless track disease elimination. Background technique [0002] With the development of high-speed railways, ballastless tracks are widely used in high-speed railway lines due to their high smoothness, good rigidity uniformity, and long-lasting track geometry. Operation practice in recent years has shown that the overall state of the ballastless track structure is normal, but under the long-term train operating load and the external environment, the mortar layer bond gradually fails, the reinforced concrete support layer is damaged, and the cracks on the track slab arch occasionally occur , resulting in poor track geometry, which brings great safety hazards to the normal operation of the line. Once the track structure is damaged, it should be repaired and rectified in time. When the repair ope...

AI Technical Summary

Problems solved by technology

[0005] Because high-speed railways have high requirements for train operation safety and stability, and the height of the ballastless track structure is relatively low, and the construction space is limited, the traditional overhead method of operating lines cannot be well applied to the temporary overhead of the ballastless track

The hanging / fastening rail method and the I-beam beam method are generally suitable for occasions with narrow spaces and small spans, and the loads they bear are not large. The installation of the overhead structure is cumbersome, poor in stability, and low in reliability; in the I-beam hanging beam method, each longitudinal beam is a single piece of I-beam, and the beam is a matching shaped steel sleeper. The longitudinal beams, beams and basic rails are connected by bolts. However, the overhead fulcrum adopts concrete digging piles, and the size of the I-beam structure is large, which is not suitable for occasions with small spaces; the D-shaped beam is a shaped steel beam structure specially made by the factory for overhead lines, with high strength and rigidity. Large, large span and high reliability, but the D-shaped concrete beam is generally used in the occasions where the ballasted track has an existing offline building structure. The volume and quality of the beam are too large, the convenience is poor, and the operation is difficult. Applied to the temporary overhead space of ballastless track

[0006] In the overhead scheme disclosed in the Chinese invention patent with the application number of 201610605003.7, since the large longitudinal girder of the steel pad girder adopts an I-shaped cross-section, the length and span of the beam body are relatively small. There is a blank section between them, and the blank section must be provided with transitional sleepers to support the line rails. The overhead line is composed of steel pad beams and multiple loose sleepers. The construction is cumbersome, and the integrity and stability of the overhead line are poor. The seat and the limit device are a single fixed structure, which cannot adjust the position of the beam body in the vertical and horizontal directions, making it difficult for this kind of overhead device to be suitable for the remediation of some special disease conditions; for the case of a long remediation range, The overhead scheme can only be constructed in sections, and the repair period is long

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