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Optimal measurement design for parameter identification in mechanized tunneling

Underground Space 2018年第1期3卷 34-44页

作者： raoul holter Chenyang Zhao Elham Mahmoudi Arash AlimardaniLavasan Maria Datcheva Markus Konig Tom Schanz Ruhr-Universitit Bochum Department of Civil and Enviroromental EngineeringUniversititsstr.15044780 BochumGrmany Bulgarian Academy of Sciences Institute of MechanicsAcad.G Bonchew Stbl.41113 SofiaBulgaria

When performing shallow tunnel construction,settlements on the ground surface often cannot be *** these sur-face displacements is only possible with profound knowledge of the constitutive parameters of the surrounding *** inverse analysis on the basis of in situ settlement data is an effcient method for obtaining such ***,during this process,con-sidering which measurement arrangement can provide the most reliable results is generally *** aspect is addressed in this study by applying the so-called“optimal experimental design”to the mechanized tunnelingﬁeld.A global sensitivity analysis(GSA)isﬁrstly performed to determine the most relevant model parameters to be identiﬁed via back analysis,by employing the considered numerical model and experimental ***,the GSA results are utilized to determine where and when measurements should be performed to minimize uncertainty in the identiﬁed constitutive *** optimal experimental design(OED)concept is fur-ther applied to evaluate the observation set-up effciency for damage mitigation measures within a representative synthetic example of a tunneling project passing beneath an existing *** identiﬁcation based on synthetic noisy experiments is performed to validate the presented method for optimal experimental ***,the soil stiffness and strength parameters are identiﬁed according to both an intuitive and the elaborated method,employing the proposed OED strategy and experimental designs,making it possible to assess the feasibility of the OED results.

关键词： Mechanized tunneling,OptimacxperimI sensitivity analysis Back analysis

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