近海浅覆盖层中桥梁基础设计与施工关键技术

Key Design and Construction Technologies of Bridge Foundation in Shallow Covering Layer of Offshore Area

以海螺岛跨海大桥项目为背景,分析设计过程中对场区地质条件和周边环境的,以及对桥梁在近海浅覆盖层中基础形式的分析与比选,综合考虑经济因素与施工难度,最终选取了合适的基础方案。介绍钢护筒长度选定,分析施工过程中钢护筒下沉的原因并提出了解决方案。取消了跨海大桥海中围堰施工,极大节约施工措施费用。

Taking Hailuo Island Cross-sea Bridge Project as the background,the geological conditions and surrounding environment of the site are analyzed,and the foundation forms of the bridge in the shallow covering layer of the offshore are analyzed and compared during the design process.The economic factors and construction difficulties are comprehensively considered.Finally,the suitable foundation scheme is selected.The selection of steel casing length is briefly introduced,the reasons of the steel casing sinking during construction are analyzed and the solution is proposed.As a cross-sea bridge,the construction of offshore cofferdam is cancelled,which greatly saves the cost of construction measures.