Unballasted track construction

Abstract

The invention discloses a non-ballast track structure, which aims to effectively strengthen the integrity and the anti-vibration performance of a non-ballast track and reduce the maintenance and repair workload of a track structure. The non-ballast track structure comprises a track plate (10) adopting a prestressed reinforced concrete structure, a base (30) adopting a reinforced concrete structure, and a mortar adjustment layer positioned between the track plate (10) and the base (30), wherein the mortar adjustment layer is a resin mortar layer (20), and the resin mortar layer (20) is adheredto the track plate (10) and the base (30) to form an integral structure. The non-ballast track structure has the advantages that the resin mortar layer has good elasticity and adhesive property and canfirmly connect the track plate and the base into a whole, thereby improving the integrity and the anti-vibration performance of the non-ballast track structure; and the non-ballast track structure ca n effectively accelerate the pouring rate of the mortar adjustment layer and ensure the construction quality, so the non-ballast track structure has the characteristic of convenient site constructionand can realize rapid maintenance.

Description

technical field [0001] The present invention relates to railway ballastless track, in particular to the structure of ballastless track. Background technique [0002] my country is a country with frequent earthquakes, and the damage to structures caused by earthquakes is huge, and reasonable structural types can effectively reduce the damage to structures caused by earthquakes. Therefore, earthquake-resistant structural design is required in general structure design. In recent years, my country is vigorously building high-speed railways and passenger dedicated lines, and more and more ballastless tracks will be laid. Since the damaged ballastless track structure is difficult to repair, it is especially important to carry out research on the seismic adaptability of ballastless track structures in earthquake-prone areas. Significantly important. At present, there are no requirements on the seismic design of ballastless track in domestic track design codes. Considering the safet...

AI Technical Summary

Problems solved by technology

The advantage of the CA mortar adjustment layer is that it can be easily repaired and replaced. However, since the CA mortar adjustment layer cannot connect the track slab and the base structure layer as a whole, it has the disadvantage of poor integrity and cannot meet the requirements for improving the seismic performance of the track.

At the same time, in order to restrain the influence of the lateral train load and the longitudinal horizontal braking force on the track, it is necessary to set up convex stops on the base at intervals, and to set corresponding gaps at the longitudinal ends of each track slab, so there are still complex structures of track slabs and The construction channel is not smooth and other deficiencies, which are not conducive to reducing construction costs and speeding up the construction speed of the track

In addition, due to the limitation of the performance of the material itself and the instability of raw materials and preparation methods, the strength of CA mortar material is low, and it is difficult to withstand long-term fatigue loads. The construction process of CA mortar is cumbersome, and special mixing and pouring equipment must be equipped. The hardening time is long and the strength rises slowly, which has a great influence on the construction progress

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