Prediction and analysis of the impact of ground rebound caused by nearby open-cut construction on subway structures in the longitudinal direction and its construction

Abstract

Various underground projects are being constructed in close proximity to existing underground structures such as subways in order to revitalize urban functions. In order to ensure the safety of the in-service facilities, it is necessary to accurately predict not only the impact of the rebound on the underground structures, but also the track gradient in subway tunnels. Currently, there are scattered cases of discrepancies between the preliminary impact prediction analysis values and the actual measured values. The main reason for this is that the interaction between the ground and structures has not been fully elucidated, and there are few examples of systematic analysis of this interaction. Therefore, the authors decided to conduct a number of systematic model experiments to elucidate the above interactions, while collecting data on several types of construction near the existing subway tunnels. This paper introduces a case study of the effects of ground rebounding caused by open-cut construction in close proximity to our existing subway tunnel, and describes the details of the model experiments that will be conducted in the future.