Widening subgrade structure based on existing railway subgrade and construction method of widening subgrade structure

A technology for existing railways and wide subgrades, applied in the field of wide subgrade structures and their construction, can solve problems affecting the safety of high-speed railways, and achieve the effects of reducing loads, saving construction land, and improving stability

Active Publication Date: 2017-03-22
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the settlement and horizontal displacement of the operating line caused by the large-area piled load beside the line occur from time to time, which seriously affects the safety of high-speed railway operation, and has to be rectified at a great cost

Method used

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  • Widening subgrade structure based on existing railway subgrade and construction method of widening subgrade structure
  • Widening subgrade structure based on existing railway subgrade and construction method of widening subgrade structure
  • Widening subgrade structure based on existing railway subgrade and construction method of widening subgrade structure

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] Through the research on the existing railway subgrade, it is found that if we want to reduce the additional settlement of the existing high-speed railway subgrade caused by the newly built railway subgrade, we need to start from two aspects: one is to deal with the subgrade; the other is to reduce the filling of the newly built railway subgrade load.

[0026] The side width roadbed structure based on the existing railway roadbed of the present invention maintains the stability of the existing embankment by reducing the filling load of the new railway roadbed, and reduces the additional settlement of the existing high-speed railway roadbed.

[0027] see Figure 1 to Figure 4 , the side width roadbed structure based on the existing railway roadbed of the present invention includes steps 1 on both sides, an anti-filter layer 2 an...

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Abstract

The invention discloses a widening subgrade structure based on an existing railway subgrade. The widening subgrade structure comprises a step arranged on the side slope of the existing railway subgrade, an inverted filter arranged on the step, and a retaining wall poured on the outer side of a widening railway embankment. The space between the inverted filter and the retaining wall is filled with light soil. A crack-prevention steel bar mesh is laid at the preset height in the light soil. A subgrade filler is constructed on the light soil. The invention further provides a widening subgrade method of the existing railway subgrade. According to the subgrade widening structure based on the existing railway subgrade, the load of the widening subgrade can be reduced greatly through the characteristic of small density of the light soil, the stability of the widening subgrade is improved, and extra sedimentation of a railway operation subgrade is reduced. Through the retaining wall on the outer side of the light soil, the usage quantity of the light soil can be reduced, construction land is saved, and the retaining wall can serve as a template for construction of the light soil.

Description

technical field [0001] The invention relates to the technical field of railway construction, in particular to a side width subgrade structure based on an existing railway subgrade and a construction method thereof. Background technique [0002] At present, my country's high-speed railway network with "four vertical and four horizontal" as the skeleton has basically taken shape. How to connect the new high-speed railway and intercity railway with the existing high-speed railway network in the future has become a huge technical problem. [0003] In the project of introducing the existing high-speed railway into the new railway, how to connect the subgrade of the new railway with the side width of the subgrade of the existing high-speed railway is a technical problem. Due to the high standard of high-speed railway deformation control, the use of conventional foundation treatment and existing line side filling technology will inevitably cause additional settlement of the existi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B2/00
CPCE01B2/00E01B2204/00
Inventor 孙红林顾湘生赵新益陈尚勇杭红星吴成杰邓天天严栋安月梅廖超
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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