Influence of neighboring building on horizontal displacement of deep excavation diaphragm wall

Abstract

The Plaxis model is built based on the finite element method, the application of this method to calculate and simulate geotechnical problems is based on the integration in the Morh-Coulomb and Hardening Soil foundation models, and some other models to evaluate the reliability of the problems. This study has proposed a model area limit when analyzing deep excavations using Plaxis software, the model area limit depends on the excavation width, excavation depth and length of the diaphragm wall. Research on the influence of the model area limit on the results of horizontal displacement analysis of the diaphragm wall shows that once the model area limit has reached a reasonable size, expanding the model area limit has a negligible effect on the results of horizontal displacement analysis of the diaphragm wall in the excavation. With the specific nature of geotechnical works and complex terrain, construction on weak soil and checking the safety of construction methods are really necessary issues and need to be studied. This study also considers the horizontal displacement of the diaphragm wall at the heights: -1.8m, -5.2m, -8.7m when considering the influence of neighboring structures with the height of the structure being 1 floor, 2 floors, 6 floors and 9 floors for the case with and without consolidation load.