Active fault zone ballast track railroad bridge structure, construction method and repairing method

Abstract

The invention discloses an active fault zone ballast track railroad bridge structure, a construction method and a repairing method. The structure comprises flexible foundations, a bridge body and a fixing rope, the flexible foundations are arranged on the active fault zone foundation at intervals; the bridge body comprises a first beam body unit and a second beam body unit. The adjacent end partsof the first beam body unit and the second beam body unit are positioned at the top of the flexible foundation; a preformed hole is formed in the lower part of the bridge body; the fixing ropes penetrate through the preformed holes to be fixedly connected with the flexible foundation; the flexible foundations are good in earthquake resistance and has good economy, a bridge beam body with a fixingrope is arranged on a flexible foundation of an active fault zone foundation; when an earthquake occurs or the foundation of the active fault zone generates large creep deformation, the bridge beam body does not slide off, stress concentration damage between structures is avoided, the better anti-seismic property and continuous deformation resistance are achieved, meanwhile, after vertical deformation and plane deformation are too large, the bridge beam body can be rapidly adjusted and repaired, and engineering investment is reduced.

Description

technical field [0001] The invention relates to the field of railway engineering, in particular to a bridge structure, a construction method and a repairing method of a railway bridge with a ballast track on an active fracture. Background technique [0002] A large number of active fault zones are distributed in seismically active areas. Active fault zones are places where stress is easy to accumulate and are hotbeds for earthquakes. Large earthquakes often occur. When no earthquakes occur, the fault zone strata usually undergo creep deformation. Therefore, the active fault zone has a great influence on the engineering structure. The general building structure should be far away from the fault zone not less than 200m. Railway engineering is a belt-shaped project. With the continuous advancement of western construction, it is difficult to completely avoid active section zones in railway construction. For example, the proposed Sichuan-Tibet railway project must pass through m...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a bridge structure and a construction method for a bridge structure with a ballast track in an active fault zone in view of the existing problems in the prior art that the bridge structure in the active fault zone has poor seismic performance, weaker resistance to continuous deformation and high engineering investment and the fix

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