Mounting method of three-span continuous steel bridge

Abstract

The invention relates to a mounting method of a three-span continuous steel bridge. The mounting method comprises the following steps of: (1) reasonably dividing the steel bridge in segments, and planning and arranging a crane walking route and crane stations; (2) arranging temporary supports; (3) mounting two-shore steel bridge supporting seat embedded elements and two-shore steel column pre-embedded segments; (4) mounting two-shore steel columns and steel beams between the steel columns; (5) assembling steel bridge segments on the ground; (6) mounting two-shore steel bridge segments, and performing welding and fixing; (7) mounting river-crossing steel bridge segments on a river way, and performing welding and fixing. According to the mounting method disclosed by the invention, the steel bridge is divided into a plurality of segments, and before the segments are hoisted, parts and components are assembled into the segments on the ground; and therefore, the problems that hoisting is difficult, and the steel bridge cannot be transported on a road are solved, aloft welding operations are reduced, the efficiency is greatly improved, and the risk is reduced.

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, highways, landscape greening, etc. Except for the scope of temporary land acquisition, 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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