东海大桥承台混凝土套箱分块拼接施工安全分析  

Analysis on Piecemeal Assembly Construction Security of Concrete Jacket Box for Base Slab of Donghai Bridge

作　　者：黄向平 莫景逸 

机构地区：[1]中交第三航务工程勘察设计院有限公司,上海市200030

出　　处：《城市道桥与防洪》2013年第7期219-221,19,共3页Urban Roads Bridges & Flood Control

摘　　要：东海大桥采用混凝土套箱法对非通航孔中高墩桥梁承台进行施工。套箱形状为长方形,比圆形套箱具有较大的迎浪面,受力更不利。因其体积较大,吊装和运输都受到施工条件的限制,海上施工的周期也较长,受天气的影响大。针对以上不利因素,从施工安全、施工条件、施工进度、经济合理性等角度出发,提出了适用于长方形套箱分块拼装方案,并采用大型有限元分析软件对施工过程进行仿真分析,为施工工艺方案的选择和施工流程优化提供依据。The base slab of the high-pier bridge in the non-navigable spans of Donghai Bridge is constructed by the concrete jacket box process.The shape of jacket box is the rectangle,has the larger head wave surface than the circular jacket box and is unfavorably stressed.Its hoisting and transportation are all limited by the construction conditions because of its larger volume.Its period of marine construction is also longer and is greatly influenced by the weather.Aiming at the above unfavorable factors,the article puts forward the piecemeal assembly scheme suitable for the rectangle jacket box from the angles of construction security,construction conditions,construction schedule,economical rationality and etc.,and analyzes the simulating construction process by the large-sized finite element analysis software,which provides the basis for the selection of construction technological scheme and the optimization of construction flow.

关 键 词：方套箱 分块拼接 承台施工 东海大桥 

分 类 号：U445[建筑科学—桥梁与隧道工程]