Large-span concrete filled steel tube tied arch bridge steel tube arch rib floating crane hoisting construction method

Abstract

The invention provides a large-span concrete filled steel tube tied arch bridge steel tube arch rib floating crane hoisting construction method. The construction method comprises the following steps of steel tube arch rib customization, steel tube arch rib transportation, steel tube arch rib assembly, support arrangement, steel tube arch rib transfer, steel tube arch rib hoisting, supporting part installation and welding reinforcement. The floating crane hoisting construction method for the steel pipe arch rib of the large-span concrete-filled steel tube tied arch bridge has the beneficial effects that a floating crane method is adopted, the steel pipe arch rib can be divided into two sections to be hoisted by utilizing the large hoisting capacity of a floating crane, the overall line shape of the steel pipe arch rib, the height difference of a steel pipe connector and the like are easy to control, and high practicability and technical advancement are achieved.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a construction method for floating and hoisting steel pipe arch ribs of a large-span steel pipe concrete tie rod arch bridge. Background technique [0002] The under-supported concrete-filled steel pipe tie-bar arch structure has high technical content, complex construction procedures, long construction period, and relatively difficult construction. Some key and special construction procedures such as pressure injection, and the hoisting procedure of arch rib steel pipes are one of the more critical procedures. The difficulty of construction is mainly reflected in the following aspects: [0003] 1. The volume, length and weight of each hoisting unit of steel pipe arch ribs (each arch rib steel pipe is divided into two sections for hoisting, each section of arch rib steel pipe is about 42m long and weighs about 24t) are relatively large in size, length and weight. , D...

AI Technical Summary

Problems solved by technology

[0003]1. Hoisting unit for each section of steel pipe arch rib (each arch rib steel pipe is hoisted in two sections, each section of arch rib steel pipe is about 42m long and weighs about 24t) are large in size, length and weight. During transportation and hoisting, the pipe joints are prone to distortion and deformation, which will have a certain impact on the alignment of the arch rib steel pipe;

[0004]2. The accuracy of closing the arch rib and the overall alignment of the arch rib are relatively high, and there are many external factors (water flow, wind force, temperature, etc.) in the hoisting process of the arch rib. It is difficult to control the accuracy during the hoisting process;

[0005]3. There are many safety hazards. The hoisting of arch ribs involves many unsafe factors such as high altitude, lifting, water operations and temporary power consumption, and the construction is difficult

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