Integrated Monitoring and Control of Deformation of Metro under Construction effected by the Construction of Foundation Pit

Abstract

In view of the influence of Metro under construction on the foundation pit excavation of the new commercial service project in the city and in order to ensure the safety of subway in the process of foundation pit excavation, combined with the geographical location and geological conditions of the project in this paper, the corresponding monitoring points were set up to protect and monitor the Metro near the project, so as to ensure the minimum impact on the Metro under the premise of normal construction of the foundation pit. The monitoring results were in line with the requirements of the specification, providing guarantee for the subsequent construction.

Study on the Influence of Foundation Pit Excavation on the Deformation of Adjacent Subway Tunnel in the Affected Area of Fault Zones

“…Currently, China has the world's largest urban subway construction market, and various engineering activities near subway tunnels are increasing day by day, among which the construction of foundation pits near subway tunnels has become a top priority. The construction of foundation pits can cause changes in the stress field [1] and displacement field [2] of the stratum, which can generate additional stress and displacement on the adjacent subway structures, affecting the safety and normal use of the subway operation [3,4]. The subway tunnels respond differently to the relative positions, excavation sizes, support forms, and site geological conditions of surrounding foundation pits, indicating that the impact of nearby foundation pit excavation on subway tunnels is complex and variable.…”