Plate type ballastless track bed with reverse pressure device

Abstract

The invention relates to a plate type ballastless track bed with a reverse pressure device and belongs to the technical field of rail transportation. The problems that for an existing ballastless track, a track plate and an under-plate filling layer are more likely to strip and bulge are solved. The plate type ballastless track bed includes a base, a track plate is arranged above the base, an under-plate filling layer is arranged between the track plate and the base, and a limiting structure is also arranged between the track plate and the base. The plate type ballastless track bed further includes the reverse pressure device, and the reverse pressure device includes a reverse pressure elastic component, a connecting piece and an anchoring piece; the anchoring piece is fixedly arranged on the base, the reverse pressure elastic component is arranged between the connecting piece and the anchoring piece, or one end of the reverse pressure elastic component acts on the track plate, the other end of the reverse pressure elastic component acts on the connecting piece, and the connecting piece is connected with the base through the anchoring piece. According to the plate type ballastless track bed with the reverse pressure device, the problem that the track plate is stripped off from the under-plate filling layer can be effectively avoided, the vibration reduction and noise reduction performance is good, the service life is long, and the plate type ballastless track bed with the reverse pressure device can be widely used in various high-speed railway ballastless track lines.

Description

technical field [0001] The invention belongs to the technical field of rail transit, and in particular relates to a slab-type ballastless track bed which can prevent the stripping of the track slab and the CA mortar adjustment layer. Background technique [0002] In recent years, with the rapid development of high-speed railway passenger dedicated lines in my country, ballastless track has been widely used in China due to its advantages of high precision, fast construction speed, good stability, less maintenance workload, easy quality control, low cost and high comprehensive economic benefits. It has been more and more widely used in foreign high-speed railways, and its laying scope has gradually developed from the initial bridge and tunnel projects to roadbeds, and has gradually been vigorously promoted on intercity railways, passenger dedicated lines and high-speed railways. At present, three types of slab ballastless track are mainly used, including CRTSI, CRTSII and CRTSI...

AI Technical Summary

Problems solved by technology

However, during use, it was found that due to the high-speed railway vehicles running fast and vibrating strongly, no matter whether CA mortar or self-compacting concrete is used for the filling layer under the slab, after a period of operation, due to vibration, thermal expansion and contraction, etc. In the case of peeling and arching of the track slab and the filling layer under the slab, the track slab and the filling layer under the slab are in a suspended state after partial separation. During subsequent operations, the track slab will repeatedly sink and hit the filling layer under the slab, resulting in continuous development and expansion of cracks

Therefore, once the track slab and the filling layer under the slab are peeled off, the integrity of the slab ballastless track will be greatly reduced. The life span also causes many adverse effects, and even endangers driving safety in severe cases. At present, there is no good repair method, and only passive measures such as speed limit can be taken.

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