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Influence of Shield Tunnelling in Soft Soil on Adjacent Buildings with Shallow Foundations
(1 School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023;2 Department of Civil Engineering, Zhejiang University City College, Hangzhou 310015; 3 Hangzhou Metro Group, Hangzhou 310003)
Abstract The construction of a shield tunnel in soft soil will affect the deformation and internal force of adjacent buildings because of the shield construction technology and the characteristics of the foundations and buildings.Based on ground loss theory, a mechanical model showing the synergistic action of the ground, foundation and structure of the shallow-foundation building above the shield tunnel axis is established. The software 1stopt is adopted to solve the differential equation for the bending of the buildings on an elastic foundation, and the distribution laws of settlement, inclination and internal force of the building above the axis varying with the position of shield driving are analyzed. The case in which the max. positive bending moment and shear force occur in the building is chosen to study such key influential factors as the soil mass loss ratio, building rigidity and coefficient of the foundation and subgrade, which causes changes to the internal force of the buildings and the law of influence.
Abstract：
The construction of a shield tunnel in soft soil will affect the deformation and internal force of adjacent buildings because of the shield construction technology and the characteristics of the foundations and buildings.Based on ground loss theory, a mechanical model showing the synergistic action of the ground, foundation and structure of the shallow-foundation building above the shield tunnel axis is established. The software 1stopt is adopted to solve the differential equation for the bending of the buildings on an elastic foundation, and the distribution laws of settlement, inclination and internal force of the building above the axis varying with the position of shield driving are analyzed. The case in which the max. positive bending moment and shear force occur in the building is chosen to study such key influential factors as the soil mass loss ratio, building rigidity and coefficient of the foundation and subgrade, which causes changes to the internal force of the buildings and the law of influence.
2017, Vol. 54 