Design Optimization of Underground Subway Station Diaphragm Walls Using Numerical Modeling

Cut-and-cover construction is a soil-structure interaction problem involving staged sequences of installation and removal of bracing supports. The behavior of the retaining wall and bracing elements influence the earth pressures that act on the wall. Numerical modeling is a useful tool for optimizing the design of braced retaining wall systems because the various possible outcomes can be investigated by varying the geotechnical and structural properties of the elements for any situation. Proper understanding of the interactive behavior of the wall and bracing system will guide decisions for achieving an optimum design, both to control wall displacements and satisfy constructability requirements. This paper discusses the proper selection of soil and structural models, including considerations of nonlinear stress-strain behavior and time-dependent properties of soils, as well as the impact of groundwater seepage conditions on retaining wall behavior. A case study example is presented to demonstrate the process of modeling the complex interaction between the diaphragm walls and bracing elements for a subway station box using the software PLAXIS.

Language

  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 3122-3132
  • Monograph Title: Geo-Congress 2014 Technical Papers: Geo-Characterization and Modeling for Sustainability

Subject/Index Terms

Filing Info

  • Accession Number: 01522800
  • Record Type: Publication
  • ISBN: 9780784413272
  • Files: TRIS, ASCE
  • Created Date: Mar 25 2014 3:07PM