STUDY ON LARGE-SCALE IN-SITU TEST ON COMPOUND SOIL NAILING WALL AND DEFORMATION PROPERTY ANALYSIS

Based on the in-situ test and analysis of Holiday Square deep foundation pit with the compound soil nailing support structure in Shenzhen City,the internal force and deformation of the supported structure are measured.Then the capability of soil and soil-nailing is studied;and the deformation characteristics of soil and compound soil nailing support structure are pointed out.The following analytical results can be drawn.(1) The deformation of the compound soil-nailing support structure increases gradually;and the support structure on the top of the slope is more important in prevention of the slope from horizontal deformation.(2) In compound soil nailing support structure,the maximal settlement spot lies in the slide face;and the horizontal deformation increases when the foundation pit is excavated deeper,finally,the maximal horizontal deformation spot lies in the underside of the foundation pit.