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- Title
新建公路桥梁下穿既有高速铁路桥梁安全评估.
- Authors
姜海君; 刘金国; 李金书
- Abstract
The widening project of the new Ningbo - Taizhou - Wenzhou Expressway crosses the existing Hangzhou-Shaoxing-Taizhou High-speed Railway in the form of bridges. In order to accurately calculate the impact of the new underpass project on the existing High-speed Railway bridge, the three-dimensional space model of the underpass project and the existing High-speed Railway was established by using the MIDAS-GtS finite element software to simulate the impact of the underpass project construction process in terms of the deformation of the existing railway bridge. Research shows that :① the design scheme meets the requirements of relevant provisions of relevant specifications for highway and railway crossing; ② The additional displacement of 23 pier of Hangzhou-Shaoxing-Taizhou High-speed Railway caused by the new project is the largest in all directions, but it is less than the limit value of the specification; ③ The additional displacement is proportional to the vertical dead load applied in each stage, and about 75% of the additional displacement occurs in the fifth construction stage; Reasonable selection of structural form to reduce the dead weight of the structure can effectively reduce the additional displacement; ④ The closer to the foundation of Hangzhou - Shaoxing-Taizhou High-speed Railway, the greater the additional displacement; The additional displacement can be effectively reduced by reasonably arranging the span and foundation form and increasing the foundation spacing. The research results show that, the risk level of the new underpass project on the existing Hangzhou-Shaoxing -Taizhou High-speed Railway is within the controllable range, and the overall design scheme of the project is reasonable and meets the requirements of this safety assessment.
- Subjects
HANGZHOU (China); HIGH speed trains; PIERS; CONSTRUCTION projects; RAILROAD bridges; THREE-dimensional modeling; FINITE element method; PROPORTIONAL navigation; BRIDGE foundations &; piers
- Publication
Railway Investigation & Surveying, 2023, Vol 49, Issue 2, p100
- ISSN
1672-7479
- Publication type
Article
- DOI
10.19630/j.cnki.tdkc.202206060003