Application of Front-braced Grouting Steel Pipe Pile in Sandy Silt Layer

Taking the A0202 block project of Shanghai Lingang Science and Technology Innovation City as an example,this paper studies the feasibility of SMW(cement-soil mixing wall)construction method pile+front-braced grouting steel pipe pile composite process applied to foundation pit retaining structure in sandy silt area,and introduces the improvement of construction technology of front-braced grouting steel pipe pile during construction,which can provide references for the design and construction of the retaining structure of the foundation pit in similar foundation condition.