Construction method of low-clearance swing bridge across operational line

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.

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;...

AI Technical Summary

Problems solved by technology

[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;

[0005] (2) The traditional operation method does not carry out the weighing test, but only carries out the counterweight through the theoretical test, resulting in inaccurate counterweight data, and the friction between the support foot and the slideway is relatively large, resulting in difficulty or inability to rotate;

[0006] (3) The traditional operation does not carry out trial rotation, and it is impossible to obtain the corresponding relationship between the rotation control and the displacement of the beam body and beam end, which may easily lead to the problem of insufficient rotation or over-rotation due to the lack of control standards when the rotation is closed, and the closure deviation is large. ;

Images