Investigation of soil–pile–structure interaction induced by vertical loads and tunnelling

The response of pile groups and piled structures to vertical tunnelling-induced loads is studied. A two-stage model adopted that can efficiently consider external actions, greenfield tunnelling movements, superstructure stiffness, ultimate shaft base stresses, pile-soil interactions in uniform or layered soils, local soil behaviour (as either linear elastic, elastic perfectly-plastic, nonlinear). Several scenarios are analysed: namely, piles subjected loads; affected by induced ground movements. Model results for under compare well with field other analytical models, confirming the robustness model. For adjacent beneath single groups, impact yielding, hyperbolic transfer mechanisms shown be significant, indicating these aspects should considered risk assessments when using simplified models. Analyses free-head equivalent beams (describing flexible slabs stiff buildings) confirm pile-foundation connections superstructures decrease displacements deformations at surface level; however, their action also worsen foundation distress respect force-moment structural capacity. Considering envelopes fully-flexible perfectly rigid will not always conservative, soil-pile-structure interaction models recommended design.