MSD applied to the construction of the British Library basement: a multi-stage excavation in London Clay

CANADIAN GEOTECHNICAL JOURNAL(2024)

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摘要
This note presents the application of the mobilisable strength design (MSD) method to the monitoring results of the multipropped excavation in the south area of the British Library Euston, constructed in a highly overconsolidated stiff clay deposit. The MSD method is an energy-based approach (a nonlinear finite-element method for a single-degree-of-freedom soil-wall system) introduced to develop a simplified design methodology that satisfies both ultimate and serviceability limit states. Wall displacement predictions based on the MSD method are compared with considerable field monitoring data. The sensitivity of the method to reasonable variations in input parameters is considered. A spreadsheet and python code demonstrating the MSD analysis from this paper are provided in the online supplement alongside details of the mathematical formulation.
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mobilisable strength design (MSD),braced excavation,British Library Euston
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