Embankment bedding structure of ballastless track high speed railway in seasonally frozen earth area

A ballastless track, high-speed railway technology, applied in the direction of roads, roads, buildings, etc., to achieve the effects of high smoothness, filling quality control, and simple construction technology

Active Publication Date: 2013-08-28
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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Problems solved by technology

However, for the almost stringent millimeter-scale deformation control requirements of ballastless track high-speed railways, how to control the frost heave deformation wi

Method used

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  • Embankment bedding structure of ballastless track high speed railway in seasonally frozen earth area
  • Embankment bedding structure of ballastless track high speed railway in seasonally frozen earth area

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] refer to figure 1 The illustrated embodiment 1, the ballastless track high-speed railway embankment subgrade structure in seasonal permafrost regions of the present invention, includes the subgrade bottom layer 4a and the drainage type subgrade bottom layer that are filled sequentially from bottom to top on the embankment body 5. 3a. Drainage type subgrade surface layer 2, subgrade surface waterproof layer 1. Drainage gutters 6 are arranged on both lateral sides of the embankment body 5 . The design freezing depth Z of the subgrade bed of the embankment is from the upper surface of the waterproof layer 1 of the subgrade surface to the upper surface of the embankment body 5 . This embodiment 1 is suitable for embankment subgrade structures in areas with shallower freezing depths (the design freezing depth is less than 2.7m), and the design freez...

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Abstract

The invention relates to an embankment bedding structure of a ballastless track high speed railway in a seasonally frozen earth area to effectively control the water content of filling in a bedding scope not to exceed the initial frost heaving water content to prevent frost heaving deformation from a source so as to meet the control requirements on bedding structure deformation by the ballastless track high speed railway and ensure the high smoothness, the stability and the durability of a track structure. The embankment bedding comprises a lower bedding bottom layer, an upper drainage type bedding bottom layer, a drainage type bedding surface layer and a subgrade surface waterproof layer sequentially filled on an embankment body from bottom to top. Drainage ditches are arranged horizontally on both sides of the embankment body. The design frozen depth of the embankment bedding is from the upper surface of the subgrade surface waterproof layer to the upper surface of the embankment body.

Description

technical field [0001] The invention relates to a high-speed railway ballastless track, in particular to a ballastless track high-speed railway embankment foundation bed structure in a seasonal permafrost area. Background technique [0002] Ballastless track is a track structure that replaces loose ballast materials with high-strength and high-rigidity concrete materials. Its ability to maintain geometric state and stability is enhanced, and the maintenance workload is reduced. It is widely used in high-speed railways at home and abroad. broadly used. However, the biggest shortcoming of the ballastless track structure lies in its poor ability to adapt to the uneven deformation of the offline foundation. Once the structure is damaged, it will not only affect the comfort and safety of driving, but also make maintenance more difficult. Therefore, the strength of the offline foundation , rigidity, plastic deformation, and uniformity in vertical and horizontal directions put for...

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Application Information

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IPC IPC(8): E01C3/00E01C3/06
Inventor 魏永幸罗强邱延峻刘洋刘钢张良蒋良潍阳恩慧陈坚
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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