Method for constructing a high railway turnout continuous beam

By prefabricating single-track box girders at the beam yard and utilizing the cooperation of beam lifting machines and bridge erecting machines, safe and reliable construction of continuous beams for high-speed railway turnouts was achieved. This solved the problem of traditional cast-in-place support methods under complex working conditions, reduced construction costs, and improved construction quality and efficiency.

CN115748477BActive Publication Date: 2026-07-17CHINA RAILWAY 12TH BUREAU GRP CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA RAILWAY 12TH BUREAU GRP CO LTD
Filing Date
2022-11-23
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

When constructing continuous beam turnouts using bridge structures near high-speed railway stations, the traditional cast-in-place method with supports is difficult and risky under conditions such as high piers, crossing rivers, soft soil foundations, and existing lines, making it impossible to implement.

Method used

The construction method of first simple support and then continuous construction is adopted. The single-line box girder is prefabricated in the beam yard, transported by beam lifting machine and beam transport vehicle, and erected by bridge erecting machine to complete the construction of the turnout continuous beam. The structural transformation is achieved by the installation of permanent support and the construction of post-pouring strip.

Benefits of technology

It enables low-cost, high-quality, and safe construction under complex working conditions, shortens the construction period, and improves the standardization of construction.

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    Figure CN115748477B_ABST
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Abstract

The application discloses a construction method of a high railway turnout continuous beam. The turnout continuous beam is segmented into a plurality of cut-wing single-line standard box beams. The construction of the turnout continuous beam is completed through the following steps: beam manufacturing field precasting, beam lifting machine beam lifting, beam transporting vehicle beam transporting, bridge erecting machine simple support erection, post-pouring belt construction, negative bending moment tensioning and simple support to continuous system conversion. The application can solve the problem that the support cast-in-place cannot be implemented under special conditions of the high railway turnout continuous beam, and the continuous beam constructed by the method is better in stress.
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