Design and development of bridge erecting machine with small curve radius and bottom feeding beam.

As a key equipment in highway and railway construction, bridge erecting machines directly affect the feasibility, progress, and quality of project implementation. In order to solve the problem that traditional bridge building machines are only suitable for application scenarios with large turning radii and large lifting sites, and have low lifting efficiency, which cannot meet the requirements of urban elevated bridge construction, a small radius bottom feeding beam bridge building machine suitable for urban highway and railway construction is proposed. The feasibility and reliability were verified through force analysis and finite element analysis; Design a secondary turning structure and bridge construction process for the front leg, adjusting the turning angle to around 7°, significantly reducing the turning radius of the bridge building machine; Propose a technology for feeding and lifting beams at the bottom of dual-use bridge decks for highways and railways. By vertically lifting beams and slabs, the lifting space is significantly reduced and the lifting efficiency is improved. Finally, a small radius bottom feeding beam bridge erecting machine was developed and tested and applied. The results show that the small radius bottom feeding beam bridge erecting machine designed in this article reduces the turning radius of traditional bridge erecting machines from over 300 m to about 80 m, making it possible to carry out projects that were originally impossible, and solving the problem of elevated bridge construction in limited urban spaces.