Construction method for additionally building high-speed railway roadbed in parallel with existing high-speed railway

A high-speed railway and construction method technology, applied in infrastructure engineering, roads, excavation, etc., can solve problems such as failure to meet the use requirements, and achieve the effects of avoiding adverse diseases, ensuring construction quality, and ensuring driving safety

Pending Publication Date: 2021-08-10
CHINA RAILWAY LIUYUAN GRP CO LTD
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Problems solved by technology

However, the current conventional roadbed construction methods cannot meet the above-mentioned requirements under this working condition.

Method used

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  • Construction method for additionally building high-speed railway roadbed in parallel with existing high-speed railway

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Embodiment Construction

[0060] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0061] This embodiment provides a kind of construction method of building high-speed railway embankment in parallel existing high-speed railway, such as figure 1 As shown, the method includes the following steps:

[0062] Step S1, the technological process of leveling the original ground is as follows: site survey→removal of ground obstacles→calibration of the leveling range→setting of benchmark points→setting of grids, measuring elevation→calculation of earthwork excavation and filling works→leveling of earthwork→site Rolling → acceptance.

[0063] Specifically, in step S1, before construction, it should be ensured that the construction site is connected to water, electricity, access and the site are level, and construction pers...

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Abstract

The invention provides a construction method for additionally building a high-speed railway roadbed in parallel with an existing high-speed railway. The method comprises the steps of arranging a lengthened cast-in-situ bored pile at the slope toe of a side slope of the existing high-speed railway roadbed; after the cast-in-situ bored piles reach certain strength, arranging prestressed pipe piles in the subgrade foundation range of the newly-built high-speed railway; removing the slope surface protection of the existing high-speed railway roadbed slope, and digging a large step; pouring a concrete cushion layer on the top of the prestressed pipe pile, laying an impermeable layer, and pouring foam light soil; and constructing roadbed slope protection. Under the condition that the existing high-speed railway with the speed of 350 km/h is parallel, the functional use requirements of the newly-built high-speed railway with the speed of 350 km/h can be met, the roadbed base stress diffusion of the newly-built high-speed railway does not influence the operation of the existing high-speed railway, and the roadbed settlement of the existing high-speed railway is not influenced; the stability of the newly-built roadbed and the existing roadbed, the settlement amount and the transverse displacement in the operation period meet the standard requirements, and the use function requirements of the newly-built roadbed and the existing roadbed are met.

Description

technical field [0001] The invention belongs to the technical field of reinforcing new subgrades of existing parallel high-speed railways, and in particular relates to a construction method for adding high-speed railway subgrades to existing parallel high-speed railways. Background technique [0002] With the rapid development of my country's economy, the scale and volume of existing high-speed railways cannot meet the advanced traffic volume and urban development, and new high-speed railway projects are required. With the development of the city, the building land space in the city is limited, and it is necessary to build additional railway projects adjacent to the existing railway. Most of the railways in urban areas pass through in the form of low filling and shallow excavation, which cannot be passed in the form of bridges, and generally pass in the form of roadbeds. In order to ensure the speed of the train and the comfort of passengers, the high-speed railway has very...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/00E01C3/04E01C3/06E02D5/34E02D5/58E02D17/00E02D17/18E02D15/02E02D3/12
CPCE01C3/00E01C3/04E01C3/06E02D5/34E02D5/58E02D17/00E02D17/18E02D15/02E02D15/04E02D3/12E02D3/123Y02A30/60
Inventor 张翔周凯李晓飞牛凤鸣王飞于东彬范俊怀欧成章马文军徐文龙张强
Owner CHINA RAILWAY LIUYUAN GRP CO LTD
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