Steel beam construction method in complex environment of mountainous city near railway

By dividing the steel beams into segments, constructing mountain access roads, and setting up steel beam installation platforms, combined with the gantry crane for rotating piers, the challenges of access roads and machinery operation in the complex environment of Kintetsu in mountainous cities were solved, achieving efficient and safe steel beam construction and rotation crossing.

CN117364649BActive Publication Date: 2026-06-19CHINA CONSTRUCTION SIXTH ENGINEERING DIVISION CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA CONSTRUCTION SIXTH ENGINEERING DIVISION CO LTD
Filing Date
2023-11-07
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

In mountainous cities with limited access to railways and extremely restricted vertical space, bridge construction faces challenges such as difficult access roads, limited use of machinery and equipment, and difficulties in protecting railway lines. Existing methods are insufficient to meet the requirements for construction progress and safety.

Method used

The method of dividing steel beams into segments, constructing mountain access roads, erecting steel beam installation platforms, and using gantry cranes on rotating piers is adopted. The mountain access roads provide construction access, the steel beam installation platforms are used for transporting and assembling steel beam blocks, and the rotating piers are used to enable the steel beams to cross the railway.

Benefits of technology

It has enabled efficient and safe steel beam construction in complex environments, solved the problem of bridge construction with limited three-dimensional space, reduced temporary reinforcement measures, improved construction efficiency, and enabled the reuse of steel beams.

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Abstract

This invention belongs to the field of bridge design and construction technology, and particularly relates to a method for constructing steel beams in complex environments near railway lines in mountainous cities. The method includes the following steps: Step 1, dividing the steel beam into segments, with each segment laterally divided into several blocks; Step 2, constructing an access road along a winding mountain path, ending near the intersection of the main bridge and the mountainside; Step 3, erecting a steel beam installation platform, constructing rotating piers as needed, and laying longitudinal and transverse sliding tracks, with the transverse sliding track between two temporary fixed piers disconnected from the transverse sliding tracks on its upstream and downstream sides; Step 4, transporting and assembling the steel beam blocks and installing the steel beam segments; Step 5, temporarily anchoring the steel beam and lowering it from the support frame; Step 6, rotating the steel beam to cross the railway; Step 7, system conversion to complete the steel beam construction. The beneficial effects of this invention are: solving the challenges of bridge construction in mountainous cities near railway lines and in environments with extremely limited vertical space.
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