A method for strengthening the line of multi-span portable beams erected by combined steel large beams

Abstract

The invention discloses a method for strengthening a combined steel large crossbeam erecting multi-span convenient beam line, a method for strengthening a combined steel large crossbeam erecting a multi-span convenient beam line, including the erection of a transitional D-shaped construction convenient beam, and the construction of a steel large crossbeam There are five steps in installation, installation of distribution beam, reverse erection of formal D-shaped construction convenience beam and installation of limit device. The construction of the whole construction process of the present invention does not affect the normal traffic operation of the business line, and at the same time strengthens the traffic safety of the business line (railway); and can simultaneously complete the simultaneous reinforcement of two or more lines by using steel beams of different lengths. When the frame box bridge with holes or more than two holes is jacked, multi-span D-shaped construction beams can be erected, and the porous frame box bridge can be jacked at the same time, saving time and effort, and improving the construction efficiency by at least 50%; and steel large beams, distribution beams, The limit devices are all combined connection methods, which can be split and spliced ​​for multiple uses, and can be used repeatedly, greatly reducing labor and material costs.

Description

technical field [0001] The invention relates to a line reinforcement method for business lines, which is suitable for the jacking construction process of railway box bridges, and specifically refers to a line reinforcement method for erecting multi-span convenience beams with a combined steel large beam. Background technique [0002] With the rapid development of my country's railways in recent years, a railway network extending in all directions has been formed across the country. Therefore, there have been many projects for highway and railway interchanges, and the railway under the highway is the most common interchange mode at present. The most commonly used line reinforcement methods in the construction of overpasses are mostly D-shaped construction beams, vertical and horizontal beam lifting methods, etc. Underpass railway overpasses are generally two-hole or porous structures. During construction, after the line is reinforced, the frame box section of one hole is fir...

AI Technical Summary

Problems solved by technology

Underpass railway overpasses are generally two-hole or porous structures. During construction, after the line is reinforced, the frame box section of one hole is first jacked, and then the beam is moved and inverted to jack into the other hole. This has a long construction period, and the porous frame box section cannot be jacked at one time. The scope of application is small, and it is easy to be limited by geological conditions.

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