Abstract: Reinforced concrete support is a common type of support in the deep excavation supporting engineering. However, improper support layout often leads to the unreasonable stress and the uneconomical cost. Therefore, it is of practical significance to analyze the layout of the reinforced concrete support. This paper presents deep excavation project in Xuzhou, Jiangsu Province. The finite element analysis method of the spatial overall coordination is used to compare and to analyze different forms of support layouts. The evaluation and analysis results show that the support force superposition is generated in the corner bracing overlap area, resulting in an increase in the stress of the waler beam, and the displacement of the pile points to the outside of the excavated area, while the displacement at the other end of the corner bracing overlap area points to the inside of the excavated area and is larger, and the deformation around the deep excavation is not coordinated. Therefore, the process of arrangement of the supporting system should avoid the cross overlap. For a general rectangular excavated area, it is suggested using the form of corner bracing plus diagonal bracing to ensure the collaborative deformation around the excavated area. The study of the concrete support arrangement can provide a reference for the similar excavation engineering problems.

Key words: Deep Excavation Project, Reinforced Concrete Support, Corner Bracing