Soil Nailing Excavation Deformation Law Research

A practical Soil-Nailing Construction Pit Retaining Structure (SONACOPIR) is employed to verify the validity of the series software of Lizheng Geological Structure Designing. The in-situ deformation monitoring results prove the correctness of corresponding software. Then, the software is used as the deformation calculation tool. The following parameters of pit is deliberately changed, and the corresponding deformation is calculated, the parameters including Code Algorithm, excavation steps, water table, Poison ratio and some other calculation parameters. In this way, some general SONACOPIR deformation tendencies are summarized.After the whole calculation process compared with the in-situ monitoring results, it is found that the general deformation contour of SONACOPIR matches the monitored one. However, for SONACOPIR structures, different excavation strategies bring the same deformation magnitude. This is quite wrong when compared with the practical monitored results. Therefore, it is advised that the series software should be modified to be perfect.