Analysis of Excavation in Soft Soil Areas under Creep Effects and Its Impact on Existing Tunnels

Accurately evaluating the influence of deep excavations on adjacent metro tunnels is critical for the safe development of urban underground space. Firstly, a one-dimensional consolidation creep test was carried out on the mucky soft soil in this area. On this basis, a numerical model of a soil-pit–tunnel system was developed to analyze the influence of soil creep on the deformation of diaphragm walls and adjacent metro tunnels. The following data comprise the experimental parameters derived from creep tests, along with field monitoring results and numerical simulation outcomes from the engineering practice.The "creep-test" file presents the changes in soil sample compression value, strain, and strain rate over time under stepped loading during the one-dimensional secondary consolidation test. The "project analysis" file displays the tunnel's horizontal and vertical displacements, interface deformation, and diaphragm wall horizontal displacements under two scenarios (with and without creep effects), along with the tunnel cross-section deformation and diaphragm wall horizontal displacement after support optimization, and the simulated tunnel settlement over one year.