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.
sinking of caissonseawater pump house foundationsubsidence coefficientsinking stability