摘要
Abstract
Taking the construction of the extra-large bridge over Jialing River in LJ3 contract section of G5 Beijing-Kunming Expressway from Guangyuan to Mianyang as the exemplar,based on the on-site construction scheme and technology,the construction technology of underwater pile cap cofferdam is analyzed.The main body of Jialing River Bridge is made of a continuous steel structure of 95 m+180 m+95 m,and the approach bridge adopts 25 m,50 m and 48.5 m simply supported T-girder.In this paper,the 2～3#caps of the main bridge are taken as exemplars,and the underwater cofferdam is in the form of locked steel pipe pile.The cofferdam mode follows the principles of geographical environment and hydrological conditions,the use and function of the project,and the economy and feasibility of the project.In the process of construction,the construction procedure is planned reasonably,and the construction of pile foundation trestle and cofferdam are carried out at the same time.Finally,we focus on strengthening the inspection of the lock,ensure the deformation monitoring of the key position of the cofferdam to guarantee safe construction.关键词
特大桥/水中承台/围堰施工/锁扣钢管桩/施工技术Key words
extra-large bridge/underwater pile cap/cofferdam construction/locking steel pipe pile/construction technology分类
建筑与水利
