钢板桩围堰施工阶段变形对比分析  

Contrastive Analysis on Deformation of Steel Sheet Pile Cofferdam in Construction Stage

作　　者：李攀 同伟军 邓富超 LI Pan;TONG Weijun;DENG Fuchao

机构地区：[1]中交路桥建设有限公司,北京市100027 [2]中交路桥华东工程有限公司,上海市200000

出　　处：《城市道桥与防洪》2022年第8期135-137,143,M0016,共5页Urban Roads Bridges & Flood Control

摘　　要：泰东河大桥主桥为51 m+85 m+51 m单箱单室变截面连续箱梁,主桥主墩均位于泰东河为Ⅲ级运河河道内距岸边10 m,采用筑岛钢板桩围堰法施工。承台基坑开挖深度7.186 m,属于超过一定规模危险性性较大分部分项工程,施工安全风险大。通过结合基坑开挖过程中实际工况,对钢板桩围堰模型受力分析、计算,探讨了在模型定义施工阶段过程中判别结构变形前和变形后的计算依据和方法,为钢板桩围堰的顺利施工提供了技术保证。Then main bridge of Taidong River Bridge is a 51 m+85 m+51 m single-box single-chamber variable cross-section continuous box girder. The main piers of the main bridge are located at 10 m from the bank within the riverway of Taidong River as Class III canal. The island-building steel sheet pile cofferdam method is adopted for the construction. The excavation depth of foundation pit for the base slab is 7.186 m, which belongs to more than a certain scale of dangerous partial project. The construction safety risk is large. Through the actual conditions in the excavation of foundation pit, the model stress of steel sheet pile cofferdam is analyzed and calculated. The calculation basis and method to distinguish the structures before and after deformations during the construction stage of model definition are discussed,which provide the technical guarantee for the smooth construction steel sheet pile cofferdam.

关 键 词：连续梁 钢板桩模型受力分析 基坑开挖 施工阶段 工况分析 

分 类 号：TU753.62[建筑科学—建筑技术科学]