The Field Monitoring and Numerical Simulation of Spatiotemporal Effects During Deep Excavation in Mucky Soft Soil: A Case Study

• DOI: 10.3390/app15041992
• Publication Date: 2025-02-14T11:52:01Z
• Authors: Qiang Wu; Jianxiu Wang; Yanxia Long; Xuezeng Liu; Guanhong Long; Shuang Ding; Li Zhou; Huboqiang Li; Muhammad Akmal Ha...
• Keywords: Technology; QH301-705.5; T; Physics; QC1-999; mucky soft soil; spatiotemporal effects; Engineering (General). Civil engineering (General); field monitoring; Chemistry; deep excavation; numerical simulation; TA1-2040; Biology (General); QD1-999

The issue of geotechnical hazards induced by excavation in soft soil areas has become increasingly prominent. However, the retaining structure and surface settlement deformation creep spatial effect sequence are not fully considered where only elastic–plastic is used design. To understand spatiotemporal effects excavation-induced pits, a case study was performed with Huaxi Park Station Suzhou Metro Line S1, Jiangsu Province, China, as an example. Field monitoring conducted, three-dimensional numerical model developed, taking into account characteristics mucky clay response structures excavations. ground during processes were analyzed. results show that depth increased, horizontal displacement diaphragm walls increased linearly tended to exhibit abrupt changes when approaching bottom pit. maximum wall at west end well close 70 mm, standard section reached approximately 80 mm. on both pit sides showed “trough” distribution pattern, peaking about 12 m from edge, rate −1.9 mm/m per meter depth. process directly led lateral walls, resulting settlement, which prominently reflected time-dependent process. These findings provide critical insights for similar deep projects soil, particularly regarding deformations, providing guidance design standards strategies geological conditions.