An installation and construction method for an upper beam of a double-layer synchronous beam

Abstract

The invention discloses an installation and construction method for an upper beam of a double-layer synchronous beam, and relates to the field of elevated bridge engineering construction. A main structure comprises a large bent cap for placing box girders and a middle cross beam for placing a U-shaped beam, and a bridge girder erecting machine and a truck-mounted crane are required. The method mainly includes the following steps: step A: set up a lifting station position; step B: making relevant measurement and lofting work before lifting the box girders, and confirming the lifting position ofthe box girders in each bridge span; step C: lifting the box girders; step D: placing the box girders and lifting the U-shaped beam; step E: laying a girder transporting path after the U-shaped beamis laid in place; step F: resting the rest of the box girders back to the original positions after the U-shaped beam is laid in place and fixing all the box girders. In the method, as for the U-shapedbeam, a method of carrying a beam on another beam is adopted to solve the problem that heavy U-shaped beams cannot be hoisted, and the box girders parallel to the U-shaped beam are hoisted, and the problem that the box girders and the U-shaped beam invade each other's lifting space is solved through different steps.

Description

technical field [0001] The invention relates to the field of viaduct engineering construction, in particular to a beam-laying process for co-constructing viaducts with common rails. Background technique [0002] The girder construction of the viaduct is an important and difficult project in the construction of the viaduct. The existing box girders on the viaduct are constructed in the mode of pouring on site, but this construction method is costly and time-consuming. Therefore, some construction units use hoisting The installation of the box girder is carried out by means of prefabricated beams. The large-scale rapid pouring of box girders in the factory is completed, and then transported to the construction site for hoisting. Although this method of erecting beams is low in cost and takes a short time, it is subject to various constraints on site conditions and cannot be universally applied. In order to avoid this problem, there is another method of transporting beams on b...

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a method for installation and construction of double-layer synchronous girders. In this method, the U-shaped beams are transported on the beams to solve the problem that heavy U-shaped beams cannot be hoisted. The box girder of the girder adopts the hoisting method, and different steps are used to solve the problem that the U-shaped beam and the box girder invade each other's hoisting space