Protection of buildings and structures in the zone of influence of metro tunnel construction

Engineering and construction of roads, subways, airfields, bridges and transport tunnels
Authors:
V.V. Sorokin
Abstract:

This article proposes a constructive solution for a protective combined geotechnical barrier to minimize the impact on existing buildings and structures from the construction of a subway tunnel. The barrier is utilized during the construction of a metro tunnel in weak soils on a developed area. The object of research is existing buildings and structures in the area affected by underground construction. The research subject is the additional deformations of the foundations and structures of existing buildings and structures. The aim of the study is to reduce the impact on neighboring buildings during the construction of the metro tunnel. Method. The research was conducted using numerical modeling. Three-dimensional and planar finite element models were developed in the Plaxis software package for analysis. Results. The values of additional foundation settlements and stresses in the building structures were determined. The effectiveness of the installation of a geotechnical barrier along the escalator tunnel is confirmed. The barrier reduces the maximum absolute foundation settlements of the surrounding buildings by an average of 40% and the relative differential settlement by 66%.

Key words:
surrounding building-upweak soilstunneling excavationzone of influencegeotechnical barrierbase deformation
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