Overhead method for existing railway in area with soft foundation and high water level

Abstract

The invention discloses an overhead method for an existing railway in the area with soft foundation and high water level. A temporary bridge abutment is constructed by adopting columnar piers, rectangular bridge abutments and a bored pile foundation; and the existing railway is built in the air by adopting temporary beams before the construction of the temporary bridge abutment, sheet piles are manually dug by using retaining walls, and the sheet piles bear the pressure of soil on two sides so as to provide enough operation space for the construction of the temporary bridge abutment. Because of the adoption of overhead lines of the temporary bridge in the area with high water level, soft foundation and the like, the land acquisition removal is reduced, a little land is occupied, the project can be successfully implemented, and simultaneously, the safe operation of the existing railway can be effectively ensured. The construction method of the invention is suitable for the underpass existing railway of a new road, and has advantage in the existing railway of multi-railway operation in a railway station and the like.

Description

technical field [0001] The invention relates to a construction technology for erecting a temporary bridge on an existing railway with high water level, poor geological conditions and difficult lines, in particular to an overhead method for the existing railway in a section with soft ground and high water level. Background technique [0002] With the construction of railways, highways, and urban roads, there are more and more interferences between new roads, railways and existing railways. Basically, level crossing, overspan and undercrossing are used to solve the problem. Among them, level crossing has great potential safety hazards for railways and roads. , level crossing is basically not considered now, and the way of overspan has little impact on the operation of existing railways, but the way of underspan has a great impact on the operation of existing railways. [0003] For the construction of the existing railway under the city, due to the large area occupied by the co...

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Problems solved by technology

[0002] With the construction of railways, highways, and urban roads, there are more and more interferences between new roads, railways and existing railways. Basically, level crossing, overspan and undercrossing are used to solve the problem. Among them, level crossing has great potential safety hazards for railways and roads. , level crossing is basically not considered now, and the upper span mode has little impact on the operation of existing railways, but the lower span mode has a great impact on the operation of existing railways

[0003] For the construction of the existing railway under the city, due to the large area occupied by the construction line and the limited site, it is mostly difficult to implement. Generally, the method of overhead the existing railway is used for construction, but the construction of the bridge pier is under the condition of high water level and extremely poor geological conditions. It is extremely difficult, and there are many problems in the past construction methods, such as large safety hazards and long construction period

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