The performance of embedded retaining walls during and after excavation is commonly predicted using numerical techniques and assessed by field monitoring. However, subsequent back-analyses of post-construction monitoring data are rarely undertaken. The purpose of this paper is two-fold: (a) to provide a comprehensive post-construction review of site information and monitoring data from a construction site in central London and (b) to detail results from a parametric study undertaken as part of the back-analyses of five key embedded retaining wall sections. The importance of accounting for the effects of non-linear soil stiffness when predicting wall deflection profiles is highlighted by the parametric study. Good agreement between the numerical model and field monitoring data was achieved through the back-analysis exercise. Differences in the predicted class C wall deflection profiles are attributed to varying temporary support systems and complex three-dimensional site geometry. Best practice recommendations relating to field monitoring and a new streamlined methodology for performing similar back-analyses are proposed.

中文翻译：

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刚性粘土嵌入式挡土墙的反分析

嵌入式挡土墙在开挖过程中和开挖后的性能通常使用数值技术进行预测并通过现场监测进行评估。然而，很少对施工后监测数据进行后续的回溯分析。本文的目的有两个：( a ) 对伦敦市中心建筑工地的工地信息和监测数据进行全面的工后审查；( b)）详细介绍了参数研究的结果，该研究是五个关键嵌入式挡土墙部分回溯分析的一部分。参数研究强调了在预测墙体挠度剖面时考虑非线性土壤刚度影响的重要性。通过反分析练习，数值模型与现场监测数据之间取得了良好的一致性。预测的 C 级墙体挠度剖面的差异归因于不同的临时支撑系统和复杂的三维场地几何形状。提出了与现场监测相关的最佳实践建议以及用于执行类似回溯分析的新的简化方法。