Construction method of low-clearance swing bridge across operational line

An operation line, low-clean technology, applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as deformation, large deviation of closure, and large friction between legs and slides, so as to ensure rotation and reduce friction coefficient, the effect of reducing the traction force

CN108589556AActive Publication Date: 2018-09-28CHINA RAILWAY 23RD CONSTR BUREAU LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2018-09-28

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Abstract

The invention discloses a construction method of a low-clearance swing bridge across an operational line. The construction method comprises the steps of preparing for swing, installing and constructing a swing structure by virtue of the techniques of step-by-step installation and multiple pouring, performing beam body construction, performing a balance weighing test and trial swing construction, allowing formal swing to be in place, and using a steel shell method to perform the construction of an ultra-low-clearance closure segment. The construction method of the low-clearance swing bridge across the operational line adopts a spherical hinge multistep installation precise control technique, a balance weighing test pre-weighting technique, a swing parameter correction and precise positioning technique and a closure segment ultra-low-clearance steel shell construction technique to meet specifications, precision of design drawings and quality requirements, and leads the way in swing spherical hinge installation precision, swing balance stability and precision control. The construction method solves the difficult problem of insufficient clearance under the bottom of the bridge, and ensures the safety of the operational line.
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Description

technical field

[0001] The invention relates to the technical field of bridge engineering construction, in particular to a construction method for a low-clearance swivel bridge spanning an operation line. Background technique

[0002] With the development of my country's society and economy, and a new round of infrastructure construction, it is necessary to build more bridges across existing roads, railways, and rivers, and the swivel bridge has little impact on existing operating lines. , low security risk and other advantages, has been widely used.

[0003] But there are following problems in the existing swivel bridge construction method:

[0004] (1) The traditional operation method is generally to position the lower turntable support and then pour the lower cap concrete, which may easily lead to the displacement and deformation of the support during the concrete pouring process, resulting in the installation accuracy of the lower ball joint not meeting the requirements;...

Examples

Embodiment Construction

[0081] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0082] Such as figure 1 As shown, a construction method of a low-clearance swivel bridge across the operating line includes the following steps:

[0083] a: preparation for turning;

[0084] a1: Relocate or modify the optical cables and cables that interfere with the piers and support foundations of continuous beams;

[0085] a2: construction protection pile;

[0086] a3: Pre-embedded parts such as the pile foundation and cap of the construction main pier, and the lower turntable spherical joint skeleton;

[0087] a4: The pile foundation, cap and pier body of the construction sid...