Subway tunnels displacement analysis due to two different communication channels construction procedures

Abstract

Due to congestion in overground space, many underground structures have been built to facilitate communications between cities. These structures constructions will induce soil displacement, cities planning rearrangement, and sometimes are near to future buildings constructions. In some cases, communication channels should be built to allow the underground junction between the building and the subway station. Numerical simulation has been carried out to study the tunnel displacement behavior during construction stages. Two different procedures of the communication channel construction were also investigated. The results reliability were evaluated by monitoring six points displacement in the sheet pile walls after completion of the foundation pit. The results obtained were reasonably close to the monitoring results proven reasonably of the research ideas and the method scientificity. The results showed using sheet piles walls, and struts before soil excavation could reduce considerably the lateral displacement of the subway line during the excavation process and induce augmentation in the subway line vertical displacement. The lateral displacement effect of the walls thickness variation is much superior to the one provides by the struts cross-section and pile's diameter variations.

Effect of Inclination Angle on the Response of Double-row Retaining Piles: Experimental and Numerical Investigation

“…The surcharge loading effect, however, was disregarded in the model. Fall et al [15] reported the application case of the double-row sheet pile wall in deep foundation pits near the subway lines. The results of the numerical calculation and field measurement demonstrated that the deformation of the foundation pit of the double-row sheet pile wall is relatively small.…”

Safety Assessment of the Impacts of Foundation Pit Construction in Metro Station on Nearby Buildings

“…Taking building information modelling (BIM) as the risk identification platform, Ganbat et al [12] set up a mechanism that can identify the risks accurately and timely in the early stage of construction. With the aid of engineering software [13][14][15] simulated how excavating deep foundation pit disturbs the soil and affects the displacement of underground pipelines, and introduced additional reinforcement to the hazardous areas [16,17] regarded tunneling risk as the equivalent of excavating risk of foundation pit, designed reinforcement measures against instability and deformation, and successfully applied the measures in metro station construction.…”