Study on the influence of sewage pipeline construction on the foundation of the neighboring bridge

With rapid urbanization, conflicts between underground pipeline construction and existing bridge infrastructure have become increasingly prominent. This research aims to fill the gap in understanding the differential impact mechanisms and dynamic coupling effects between construction activities and bridge foundation stability. The study employs the finite element model to simulate the construction process, including working well excavation and pipe jacking, in a 120×80×30-meter three-dimensional model. Results show that both excavation and pipe jacking activities have minimal impact on the adjacent bridge foundations, with maximum horizontal displacements remaining within safe limits. This research provides a methodological framework for urban infrastructure risk assessment, offering technical references for balancing underground construction activities with existing structural protection.