Assembled sleeper slab type or track slab type ballastless track structure and assembling method

Abstract

The invention discloses an assembled sleeper slab type or track slab type ballastless track structure and an assembling method. A plurality of prefabricated sleeper slabs or prefabricated track slabsare arranged on a track lower foundation in the longitudinal direction in a spaced manner and correspondingly connected with each other; longitudinal connecting pieces are arranged between the two adjacent slabs; and concrete is poured to the connecting areas so that the track slabs form an assembled integral structure; limiting members can be arranged in the longitudinally connecting areas according to needs; concrete is cast on the limiting members in place so that each sleeper slab and the track lower foundation form an integrated structure; and therefore, the connecting and limiting of each sleeper slab are effectively realized to rapidly form the ballastless track structure. According to the assembled sleeper slab type or track slab type ballastless track structure and the assemblingmethod, the structure is simple; the assembling is simple and convenient; a track can be rapidly maintained or changed when track diseases occur; the connecting and limiting accuracy of the sleeper slabs is high; the reliability is high; the track assembling efficiency is high; the construction period is short; the construction cost is low; the ballastless track construction quality is improved; the service life of the ballastless track is prolonged; material waste is reduced; and very important promotion and application values are realized.

Description

technical field [0001] The invention belongs to the field of ballastless track, and more specifically relates to an assembled sleeper plate type or track plate type ballastless track structure and an assembly method. Background technique [0002] Ballastless track refers to the track structure that uses concrete, asphalt mixture and other integral foundations to replace the loose-grained gravel track bed. Compared with the ballasted track, the ballastless track avoids ballast splashing, has good smoothness, good stability, long service life, good durability, and less maintenance work, and is being used more and more. The structure of slab ballastless track mainly involves structures such as track slab, asphalt mortar or self-compacting concrete filling layer, base or supporting layer, wherein the base or supporting layer adopts concrete structure, and the asphalt mortar or self-compacting concrete filling layer laid on the base or supporting layer The layer is the structura...

AI Technical Summary

Problems solved by technology

In the unit slab ballastless track structure, each track slab after laying and installation is independent. The disadvantage is that after the line runs for a period of time, the track slab and the asphalt mortar filling layer will peel off, and the longitudinal direction of the track slab The end is prone to warping, which will undoubtedly have a negative impact on the smoothness, comfort and life of the track structure of the train

[0007] However, the connection of each unit plate of the ballastless track structure is realized by matching protrusions and depressions, the structure is still relatively complicated, and the track plate needs to be specially prefabricated, and the above-mentioned protrusion structure makes the middle of the entire track surface protrude, such as In the subway and other occasions, it does not meet the safety evacuation requirements. In addition, the concave-convex fit connection between the unit slabs of the track belongs to the direct hard connection of the concrete slabs, and the connection accuracy is poor, and there is no buffer between the unit slabs, which makes the whole ballastless The overall accuracy of the track is greatly affected; on the other hand, the track plate limit device of this ballastless track adopts a special limit structure, in which not only the limit parts must be prefabricated, but also the base plate connected with the track plate Opening holes on the surface requires special design and modification of the foundation plate. Not only is the process complex and the amount of work is large, but the limit effect is not ideal

In particular, in this track structure, the connection structure is arranged between the track plates of each unit, and the position-limiting structure is set after a plurality of connectors are connected to a certain length, that is, the connection structure and the position-limiting structure are respectively set separately and the two are connected with each other. There is no one-to-one correspondence between the track slab units, and the connection and limit need to be set separately and designed and constructed separately. The design process is many and the engineering volume is large. If multiple limit structures corresponding to the connection structure are added, the prefabricated And the amount of renovation work is large, if fewer limit mechanisms are installed, the limit effect cannot be guaranteed

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