Development and Application of Construction Control

             System for Excavation


O.S. Kwon, C.K. Chung, J.K. Kim, H.S. Lee, M.M. Kim



 Since the reliability of results by the existing analyzing method is low for excavation performed in urban area whose stability is of great importance, construction control based on field monitoring is always necessary. But the field monitoring reflects only the behavior of construction process that already been carried out and it has limitations to predict the behavior of the expected construction process, which is practically more important for construction control. In this study, construction control system for excavation which can predict the behavior of the expected processes during construction with high degree of accuracy, is developed by employing inverse analysis. The inverse analysis applying field monitoring results to excavation analysis can improve the reliability of predicted results. The developed system employs an elasto-plastic soil spring model for the excavation analysis and the minimization of least squared errors between measured displacements and calculated displacements for the inverse analysis. All the required processes for construction control can be performed as an integrated work within the system reflecting real time application and user's convenience. Its applicability is confirmed by two case studies.

KEY WORDS : Excavation, Field monitoring, Wall displacement, Inverse analysis

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