English：

To overcome the problem of significant impact on the surrounding environment during theconstruction of the traditional frozen underground excavation method for the connecting passage, based onthe shield method connecting passage in a certain section of Tianjin Subway Line 10, the influence of theshield method connecting passage construction on soil deformation and surrounding buildings was analyzedthrough PLAXIS 3D software. The results show that, after the completion of the connecting passageconstruction, the maximum settlement and uplift of the soil occur directly above and below the connectingpassage, respectively. Along the axis and cross-section directions of the connecting passage, the surfacesettlement shows a trough shape. The main tunnel has an inhibitory effect on the soil deformation in theadjacent area. Along the axis direction of the connecting passage, the settlement of the upper part of thesoil and the uplift of the lower part show a simply supported beam distribution,with more obviousdeformation as the distance from the main tunnel increases. The construction of the connecting passageincreases the cumulative surface settlement above the main line tunnel, and has a greater impact on themain line tunnel at the shield machine’s starting section. The lengthening of the connecting passage will increase the construction impact range and the maximum surface settlement value, but the impact rangeand growth rate will decrease as the connecting passage lengthens.