龙口南山LNG接收站取排水工程沉井施工技术  

Research and implementation of caisson construction technology for intake and drainage project of Longkou Nanshan LNG receiving station

作　　者：王建 张浩男 WANG Jian;ZHANG Hao-nan(CCCC First Harbor Engineering Co.,Ltd.,Tianjin 300461,China;No.2 Engineering Co.,Ltd.of CCCC First Harbor Engineering Co.,Ltd.,Shandong,Qingdao 266071,China)

机构地区：[1]中交第一航务工程局有限公司,天津300461 [2]中交一航局第二工程有限公司,山东青岛266071

出　　处：《中国港湾建设》2024年第11期84-88,102,共6页China Harbour Engineering

摘　　要：沉井是修筑深基础和地下建筑物的一种施工工艺,其在深坑、设备基础、水泵房、取水口等工程中得到了广泛的应用,龙口南山LNG接收站一期工程取排水工程海水泵房基础采用钢筋混凝土沉井结构,本工程沉井为软弱土层地基,沉井下沉易存在偏位、流沙、管涌、突沉等风险,为有效规避上述风险发生,通过对沉井在各阶段的下沉系数、稳定性等方面进行技术研究,从而制定适用本工程沉井的施工方法与风险应对措施,确保了本工程沉井高质量、高效率施工,可为其他类似工程提供相关借鉴。Caisson is a construction technique for building deep foundations and underground buildings,which has been widely used in deep pit,equipment foundation,water pump house,water intake and other projects.The foundation of the seawater pump house of the Longkou Nanshan LNG Receiving Station Phase I project adopts reinforced concrete caisson structure.The caisson of the project is on a soft soil layer foundation,which is prone to risks such as deviation,quicksand,pipe surge and sudden sinking.To effectively avoid the above risks,through the technical research on the sinking coefficient and stability of the caisson in each stage,the construction methods and risk countermeasures applicable to the caisson of the project were formulated to ensure high-quality and efficient construction of the caisson of the project,which can provide relevant reference for other similar projects.

关 键 词：沉井下沉 海水泵房基础 下沉系数 下沉稳定性 

分 类 号：U655.544[交通运输工程—港口、海岸及近海工程]