Numerical analysis of a 36m deep diaphragm wall - parametric study

摘要

Last year a deep excavation for the construction of a metro station in Warsaw was executedrnin complex geotechnical conditions. In the first stage of the investment process the primary soil investigationrnwas performed. Basing on the results of this investigation calculations of supporting system and the design ofrncasing were carried out. In the subsequent investment stages complementary soil investigations were performedrnand the results were taken into account in the final analysis, design and dimensioning. Significant differencesrnwere observed in the results of analysis made at each investment stage. In the paper, description of the casernand multiple numerical analysis of the case with variation of soil parameters are presented. The discussion ofrncalculation results in relation to the changing geotechnical data is presented. At the end comparison of theoreticalrndisplacements and the displacements of the wall measured on site is given and final conclusions are provided.