Abstract: The cross braced single row reinforced concrete soldier pile is suitable for the support of deep excavation with the narrow and long geometry. The soldier pile spacing, embedment depth and the horizontal distance of cross bracing are the main engineering design parameters that affect the safety, reliability, and construction cost of the supporting system. The Yujiang Peninsula drainage culvert project was used as an example for the analysis. In the analysis the FLAC3D software was used to analyze the deformation, force and stability of soldier piles under different conditions. The diagram of displacement and bending moment change along the soldier pile could be developed.

Key words: municipal sewer engineering, deep excavation, soldier pile with cross bracing, FLAC3D