Abstract: As a new type of deep excavation support structure, steel sheet piles have the advantages of fast construction and reusable as the support of shallow excavations. This type of supporting structure is irreplaceable in electricity pits and box utility culvert excavation projects. Based on a comprehensive utility culvert excavation support project, this paper utilizes the parameter sensitivity analysis method and numerical simulation by using MIDAS GTS commercial software to analyze the parameter sensitivity of the steel sheet pile support of excavation. The analysis results show that the deformation of the steel sheet pile supporting structure is most sensitive to the changes in the elastic modulus of the surrounding rock and soil, followed by the internal friction angle, again the cohesion, and finally the Poisson’s ratio. The analysis results provide references and suggestions for the design and construction of similar steel sheet pile supporting projects.

Key words: Steel Sheet Pile, Geotechnical Parameters, Deformation, Sensitivity, Numerical Simulations