Open AccessEffectiveness of Cross-Walls in Reducing Wall Deflections in Deep Excavations
Author(s) -
L.W. Wong,
R. N. Hwang
Publication year - 2022
Publication title -
aijr proceedings
Language(s) - English
Resource type - Conference proceedings
ISSN - 2582-3922
DOI - 10.21467/proceedings.126.29
Subject(s) - excavation , finite element method , brace , structural engineering , geotechnical engineering , deflection (physics) , geology , metro station , engineering , optics , physics , transport engineering
Three cross-walls were installed to brace the diaphragm walls prior to excavation for a cross-over tunnel of the Taipei Metro in front of the South Gate of the old Taipei City and has now been a National Heritage. The tunnel had the maximum excavation depth of 20.1 m. Three-dimensional finite element analyses have been performed to evaluate the effectiveness and the influence of the cross-walls in reducing the wall deflections. The nonlinear Hardening-Soil model has been adopted in the analyses. The results of the analyses indicate that the maximum wall deflections are much reduced as a result and the effectiveness of cross-walls is thus proved.