A wet-joint assembly method for prefabricated sleeper slab or track slab ballastless track

Abstract

The invention discloses a wet connection type assembling method of a prefabricated sleeper slab or track slab type ballastless track. The wet connection type assembling method of the prefabricated sleeper slab or track slab type ballastless track comprises the following steps of constructing a track lower foundation; erecting prefabricated sleeper slabs; longitudinally connecting and assembling the prefabricated sleeper slabs in a spacer area and finely adjusting and positioning the prefabricated sleeper slabs; constructing limiting members; constructing a cast-in-place layer; corresponding pouring reinforced concrete to the two transverse ends of the spacer area, in which longitudinal connecting pieces and the limiting members are simultaneously arranged, on site so as to coat and cover the longitudinal connecting pieces and the limiting members; and after the reinforced concrete is cured, forming a connecting filling part so that the plurality of prefabricated sleeper slabs are assembled to form a track unit with a preset length and form a same force bearing structural body. According to the wet connection type assembling method of the prefabricated sleeper slab or track slab type ballastless track, the connecting and limiting accuracy of the sleeper slabs is high; the reliability is high; the track can be rapidly maintained or changed when the track has a disease; the trackassembling and maintenance efficiency is enhanced, the assembling period is reduced, the assembling cost and material waste of the track structure are reduced, the service life of the track is prolonged, and important promotion and application values are obtained.

Description

Technical field[0001]The invention belongs to the field of ballastless tracks, and more specifically, relates to a wet-joined assembly method of prefabricated sleeper plates or track slab ballastless tracks.Background technique[0002]Ballastless track refers to a track structure that uses concrete, asphalt mixture and other integral foundations to replace the loose 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. It is being used more and more. The structure of slab ballastless track mainly involves track slabs, asphalt mortar or self-compacting concrete filling layer, base or supporting layer and other structures. The base or supporting layer adopts concrete structure, and the asphalt mortar or self-compacting concrete filling laid on the base or supporting layer The layer is the structural layer for adjusting the ballastless track s...

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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