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Unballasted track construction

A ballastless track and structure technology, applied in the field of railway ballastless track, can solve the problems of reducing construction cost, slow strength increase, poor integrity, etc. Effect

Active Publication Date: 2010-04-21
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 5 with Image 6 The existing ballastless track configuration is shown. refer to Figure 5 , the existing ballastless track structure includes three main structural layers, the track slab 10, the CA mortar adjustment layer 40, and the base 30, which are sequentially arranged from top to bottom. The track slab 10 adopts a prestressed reinforced concrete structure, and the base 30 adopts reinforced concrete structure. The advantage of the CA mortar adjustment layer 40 is that it can be easily maintained and replaced. However, since the CA mortar adjustment layer 40 cannot connect the track plate 10 and the base structure layer 30 as a whole, the structure of the ballastless track has poor integrity and cannot meet the needs of improving Requirements for track seismic performance. refer to Figure 5 with Image 6 , in order to constrai...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01B2/00
Inventor 何华武朱颖颜华潘自立李保友姚力周立新刘学毅钱振地
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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