A method for installing a three-span continuous steel bridge

Abstract

The invention relates to a method for installing a three-span continuous steel bridge, which comprises the following steps: (1) rationally segmenting the steel bridge, planning and arranging the traveling route of the crane and the location of the crane; (2) arranging temporary supports; (3) installing Embedded parts of steel bridge supports and pre-embedded sections of steel columns; (4) install steel columns on both banks and steel beams between steel columns; (5) assemble steel bridge sections on the ground; (6) install steel bridge sections on both banks, and Welding and fixing; (7) Install the sections of the river-crossing steel bridge on the river and weld and fix them. The invention divides the steel bridge into several sections, and before hoisting the sections, the components are spliced ​​into each section on the ground, which solves the problems of difficult hoisting and the inability of the steel bridge to be transported by road, reduces high-altitude welding operations, and greatly improves increase efficiency and reduce risk.

Description

technical field [0001] The invention relates to an installation method of a three-span continuous steel bridge. Background technique [0002] In addition to crossing the river, the three-span continuous steel bridge also crosses the roads on both sides of the river, and it needs to cross the road and cross the river during installation. In the installation of this long-span bridge, there are mainly the following problems: [0003] (1) The steel bridge is surrounded by rivers, roads, landscape greening, etc. Except for the scope of temporarily expropriated land, the rest shall not be damaged. The scenic river is relatively narrow, and piling ships cannot enter, and piling construction is not allowed in the scenic river. Therefore, the steel bridge installation can only be considered to be hoisted on both sides of the river, and the hoisting radius is large. [0004] (2) The steel bridge is a long-span truss structure with various forms, and the cross-section of the steel b...

AI Technical Summary

Problems solved by technology

The scenic river is relatively narrow, and piling ships cannot enter, and piling construction is not allowed in the scenic river

Therefore, the steel bridge installation can only be considered to be hoisted on both sides of the river, and the hoisting radius is large

[0004] (2) The steel bridge is a long-span truss structure with various forms. The cross-section of the steel bridge body is relatively large, so it cannot be transported to the site by road after being processed in the factory

[0005] (3) The traditional high-altitude bulk and high-altitude welding are inefficient, and it is difficult to ensure the installation accuracy of the steel bridge. At the same time, during the installation process, the steel bridge components are frequently hoisted, which increases the safety risk

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