主墩砂层地质条件下的超长大直径桩基施工技术

Main Pier of Sand under Geological Conditions of Overlength Large Diameter Pile Foundation Construction Technology

石首长江大桥主墩基础地质复杂,桩基设计采用了大直径超长桩,实际施工深度达到119 m,采取气举反循环清孔的施工工艺。文章对大直径超深冲孔灌注桩施工进行了实践论述,可为同类型工程施工提供借鉴。

Yangtze River bridge Shishou main pier foundation in complex geological conditions,pile foundation design with large diameter and super long pile,the actual construction reached a depth of 119 m,the construction technology of gas lift reverse circulation hole cleaning.In this paper,the construction of large diameter and super deep bored pile construction is discussed,which can provide reference for the same type of engineering construction.