Double track bridge construction process crossing existing railway operational lines

Abstract

The invention discloses a double track bridge construction process crossing existing railway operational lines, and the constructed double track bridge comprises a front side bridge section, a crossed existing line bridge section with mutually connected front and rear ends and a rear side bridge section. The process comprises the following steps: 1) synchronously constructing the front side bridge section, the crossed existing line bridge section and the rear side bridge section, wherein the crossed existing line bridge section is constructed as follows: binding reinforcement cages, concreting, assembling temporary buttresses and D-shaped temporary beams, arranging movable slide rails, carrying out translation insertion on the temporary buttresses, setting up temporary beam supporters, hoisting the temporary beams, installing cap beam forming templates, concreting cap beams and removing all temporary strut members; and 2) folding the bridge sections. The invention has the advantages of reasonable design, convenient construction, low investment cost, good use effect, high construction efficiency, short construction period and low safety risk, and can effectively solve the actual problems such as large construction difficulty, long construction period, high investment cost, high safety risk and the like in the construction process of the crossed existing line gate piers.

Description

technical field [0001] The invention belongs to the technical field of bridge construction across existing railway operation lines, and in particular relates to a construction technique for a double-line bridge across existing railway operation lines. Background technique [0002] With the reform and opening up, the rapid economic development has led to the development of high-speed railways. It is inevitable for new railways to cross the original lines. Due to the influence of the construction site environment, more and more designs use portal piers to cross existing lines. How to ensure the gate The construction safety and quality of type pier spanning the existing line has become a joint research topic of all relevant units. Nowadays, the construction of portal piers that cross existing lines usually has construction characteristics such as complex structural design, short construction period, high safety risks, and large interference between construction and operation, s...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a construction process for a double-track bridge across the existing railway operation line in view of the deficiencies in the above-mentioned prior art, which has reasonable design, convenient construction, low investment cost, good use effect and high construction efficiency. High, short construction period, low safety risk, can effectively solve the practical problems in the construction of portal piers across existing lines, such as difficult construction, long construction period, high investment cost, high safety risk, etc.

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