Study on the influence of excavation with different spacing on adjacent buildings

Abstract

In order to study the influence of excavation with different spacing on the deformation of adjacent buildings, a deep foundation pit in Zhuhai is taken as an engineering background, the influence of foundation pit excavation on deformation and stress of adjacent buildings is analyzed. The result show that:(1) the overall deformation of the adjacent buildings decreases with the increase of the distance between the excavation pit and the tunnel at different spacing, and the horizontal displacement of the adjacent buildings has little difference at the same excavation step at different spacing; The shear force value and bending moment value of brick-concrete residence are above 150 kN and 170 kN·m, and the bending moment of pile foundation building increases with the continuous excavation of foundation pit, the horizontal displacement and vertical displacement of the tunnel increase with the excavation of the foundation pit, and the structural stress of the tunnel decreases with the increase of the distance between the tunnel and the foundation pit, the allowed values are not exceeded and the structure is in a safe state.

Keywords

foundation pit excavation / adjacent buildings / tunnel deformation / numerical analysis / different spacing