Abstract: With the urbanization and the diversified development of underground space, the protective requirements of surrounding reserved buildings in ht edeep excavation construction become more and more popular and comprehensive. Based on the project case history at the westside of the Liuhu Road and the north side of the Huancheng Road in Juyuan New Development, Jiading District, Shanghai, this paper studies the key aspects of the deep excavation around a water tower that to be reserved. The projective requirements of supporting this structure were evaluated and the concept of reinforced concrete ring beam plus prestressed steel strand was proposed. This measure ensured the uniform settlement of the building and resolved the problem of unbalanced force during the excavation adjacent to the tower. Throughout the finite element numerical simulation, the deformation pattern of the reserved structure was able to be predicted.

Key words: Reserved Buildings, Deep Excavations, Concrete Ring Beam Combined with Prestressed Steel Strand, Finite Element Analysis