Numerical Study of Damage Potential in Buildings due to Excavations

摘要

Evaluation industrial factory building damage potential due to ground movements caused by excavations inside the building is a critical design consideration when reconstructing the underground equipment of the industrial factory building. In this paper,the behavior of a support system for a reconstruction project of underground equipment of the industrial factory building in Shanghai and its effects on a pile-foundation supported building are presented. The 8.1 m deep excavation is made through soft clay to fine sand and retained by the 800 mm thick pile wall and the bracing system. Field observation data are collected,especially such as the lateral displacements of columns,settlement of cushion caps,and general building deformation trends. A 3D finite element method (FEM) procedure is demonstrated here with considering of interaction between soils and structures,and is conducted to examine responses of retaining wall,columns,and cushion caps due to excavations. The proposed numerical model is shown to adequately reflect the responses of the industrial building factory caused by excavations inside the building. The results of numerical prediction are close to the field observation.