Preliminary assessment of the earth’s surface movement in the impact zone of a subway tunnel construction

Abstract

Numerical modeling of the displacement of the earth’s surface during the construction of deep tunnels is considered on the example of one of the Moscow metro lines. Based on the results of numerical simulation of the driving of one and two tunnels using several calculation schemes, the forecast parameters of the displacement trough, such as subsidence, slopes, curvature, horizontal deformations of the earth’s surface, are determined. According to the criteria of deformations of the earth’s surface, a tunnel influence zone is constructed. In the influence zone of tunnels, it is necessary to create observation stations for surveying (geodetic) monitoring of subsidence of buildings and the earth’s surface, including using automated monitoring systems. According to monitoring data, the parameters of the calculation models are adjusted to increase the reliability of the simulation results. A technique is proposed for a preliminary assessment of the displacement of the earth’s surface in the influence zone of the construction of subways tunnels.