Construction method of hanging basket cantilever pouring for multi-chamber corrugated steel web continuous girder bridge

Abstract

The invention discloses a hanging basket cantilever pouring construction method of a multi-chamber corrugated steel web continuous beam bridge. The hanging basket cantilever pouring construction method of the multi-chamber corrugated steel web continuous beam bridge comprises the three processes of 0# block construction, cantilever segment construction and closure segment construction; the three processes are carried out in sequence; in the cantilever segment construction process, a hanging basket forward-moving and synchronous incremental launching method is adopted; in the cantilever segmentconstruction process, a steel web advance mounting method is adopted; and by using method of mounting a next segment of steel web in the full-strength period of concrete in this segment and asynchronously constructing middle and transverse diaphragms, the construction of a transverse diaphragm is divided into two stages. The hanging basket cantilever pouring construction method of the multi-chamber corrugated steel web continuous beam bridge has the advantages that difficult problems that hanging basket forward moving is hard to synchronously advance, the steel web hoisting construction occupies a lot of time, spaces for both segment transverse diaphragm construction and hanging basket template launching nose conflict with each other and so on in the corrugated steel web continuous beam bridge cantilever construction process are solved; the construction period can be effectively reduced; the engineering cost can be reduced; and the safety and quality of the cantilever construction process can also be satisfied.

Description

technical field [0001] The invention relates to a hanging basket cantilever pouring construction method of a multi-chamber corrugated steel web continuous girder bridge, which belongs to the technical field of construction engineering. Background technique [0002] The corrugated steel web replaces the concrete web to form a new type of composite bridge structure. The steel structure is used to bear the load on the web. It has many advantages such as light weight, high prestressing efficiency of the top and bottom plates, strong shear resistance, and beautiful appearance. Due to its unique combination structure, the stress of each component is clear, and the stress characteristics of the material are fully utilized. At the same time, it also avoids the shortcomings of traditional concrete webs that are easy to crack and the mid-span deflection continues to increase. With the increasing traffic flow, more and more super-wide multi-chamber bridges are being constructed, which...

AI Technical Summary

Problems solved by technology

On the basis of drawing lessons from the cantilever construction technology of traditional concrete box girders, the construction of steel webs should be carried out simultaneously with the binding of box girder reinforcement. However, the installation of steel webs must go through construction processes such as hoisting, positioning, welding, etc. The construction time increases the time for box girder steel bar binding, increases the construction period of sections, and is unfavorable for the control of the overall construction period

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