Abstract： Based on the engineering application of soil nailing of steel tube in an excavation with deep filling soils, the characteristics of the excavation, the procedures of design and calculation and the attentive aspects are introduced. How to reasonably choose the shear intensity parameters and of the filling soils and the friction of the nail-soil in the design and calculation and the ways to judge the years of the filling soils, are discussed. At the same time, the production technology of the soil nailing of steel tube and the quality of the jet grouting, which are the key to successful excavation bracings, are emphasized. The ideas of how to choose the design parameters and the requirements of construction technology may offer reference for similar excavation projects.
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