APPROACHES TO NUMERICAL MODELLING OF GROUND MOVEMENTS DUE TO SHALLOW TUNNELLING

Numerical prediction of ground movements due to tunnelling depends on the methods, constitutive models and parameters applied. Firstly, two basic assumptions widely used in current computational practice to predict surface settlement due to tunnelling are analysed in the paper. These are the elastic-perfectly-plastic material model and the load reduction or lambda-method approximating the 3D effect of tunnel face advance through 2D FEM solutions. Results of three parametric studies are presented. Applying different material models and parameters, the results of the lambda-method are compared with monitoring results in the first study and with 3D FEM results in the second one. In the third study the effect of in situ stress state (K sub 0 = 0.5; 1.0; 1.5) on the shape of surface settlement trough is analysed using 3D FEM and lambda-method with different constitutive models and parameters. A strong influence of K sub 0 on the amount of stress release due to tunnelling and hence on the depth and width of settlement trough was found.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/3000091696
• Corporate Authors:

  Swiss Federal Institute of Technology Zurich

  Institute for Geotechnical Engineering
  Zurich,   Switzerland  8093
• Authors:
  • Dolezalova, M
• Conference:
  • Planning and Engineering for the Cities of Tomorrow. Second International Conference on Soil Structure Interaction in Urban Civil Engineering
  • Location: Zurich, Switzerland
  • Date: 2002-3-7 to 2002-3-8
• Publication Date: 2002

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 365-374

Subject/Index Terms

• TRT Terms: Finite element method; Ground settlement; Mathematical models; Monitoring; Stresses; Tunneling
• Uncontrolled Terms: Externally imposed ground movements; Shallow tunnels
• Subject Areas: Bridges and other structures; Construction; Geotechnology; Highways;

Filing Info

• Accession Number: 00930498
• Record Type: Publication
• ISBN: 3000091696
• Files: TRIS
• Created Date: Sep 6 2002 12:00AM