Soil Deformation Investigation of a Piled-Raft Foundation Pit Under-Crossed by a Super-Large Diameter Shield Tunnel

In recent years, there has been a rise in the construction of expansive underground structures and shield tunnels with exceptionally large diameters. These projects introduce unique challenges regarding their impact on surrounding soil structures, which differ from those typically encountered conventional tunnels. However, existing body research this specific domain remains insufficient. When such intersect deep foundation pits supported by piled-raft foundations, discrepancies deformation can become even more pronounced. At present, is dearth underlying principles governing these differences, theoretical investigations have not kept pace practical engineering applications. Consequently, settlement prediction methods employed for diverse need to be reevaluated adjusted accommodate distinctive characteristics each individual project. Regarding focus paper, it crucial recognize that subsidence pit bottom significant influence mechanical response piles. implementation targeted correction measures consistently important. Based concept, paper focuses super-large diameter tunnel project under-crossed foundation. The different law at discussed after verification accuracy model through numerical simulation field monitoring data. Additionally, two coefficients consider project’s load are proposed research. were used correct surface curve. corrected curve pit’s successfully reflect results, turn pile under excavation.