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Abstract Based on the project of Shanghai metro line 11's side-crossing the St. Ignatius Cathedral，some helpful predications and deep analysis about long-term surface settlements have been presented by employing numerical simulation approaches and in-situ measurement techniques. Furthermore，the strengthening effects of MJS piles and the complicated influences of adjacent architectures are evaluated and calculated prudently. The computation results indicate that long-term surface settlement increases gradually over time and achieves stabilization ultimately. Due to the existence of MJS piles and adjacent buildings，the settlement trough significantly differs from traditional forms and performs a remarkable asymmetry. Particularly，it should be emphasized that those MJS piles effectively protect the surrounding region from large settlements and other harmful effects. The numerical simulation results and in-situ measurement data reveal a matching physical discipline；so the method of numerical simulation is validated scientifically and reasonably. Finally，several influences which contribute to the long-term settlement are analyzed：MJS pile reinforcement，building，disturbed region and creep parameters. Obviously，the achievement in this paper would provide a valuable reference for future similar projects.
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Received: 18 May 2011
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2011, Vol. 30 
