Designing displacement monitoring network and surface deformation caused by subway tunnels

Abstract

The finite element method was applied to model subway tunnels with different input features, such as tunnel diameters, tunnel depths, mechanical and physical properties of soil layers and characteristics of tunnel lining. There are some scenarios of the subway tunnels model (e.g. changing the tunnel diameters and tunnel depths). A polynomial function using internal friction angle, tunnel diameters and tunnel depths was derived from the results of the ground surface movement and deformation modelling for predicting displacement angle of Hanoi subway at Kim Ma - Hanoi Station section. On that basis, this study proposes a design plan for the surface displacement monitoring network caused by the subway project.