DEVELOPMENT OF A DESIGN TECHNOLOGY FOR GROUND SUPPORT FOR TUNNELS IN SOIL - VOL I - TIME DEPENDENT RESPONSE DUE TO CONSOLIDATION IN CLAYS. FINAL REPORT

The report presents an investigation of the phenomenon of tunnel related movements, due to consolidation in clayey or silty soils, as a result of dissipation of excess pore pressures induced during construction. A review of field data showing time dependent movements and liner load changes is provided and a finite element procedure is described to simulate this behaviour and parametric study results are discussed. It is shown that consolidation related effects lead to long term ground and liner movements and changes in liner loading patterns. Consolidation influences are greatest in cases where flexible liners or shields with large tail voids have been used in construction as this leads to greater shearing of the soil and hence excess pore pressure. Advanced pressurised face shields are shown to be capable of reducing long term consolidation movements. (TRRL)

• Corporate Authors:

  Stanford University

  Department of Civil Engineering
  Stanford, CA  United States  94305
• Authors:
  • Johnston, P R
  • Clough, W G
• Publication Date: 1983-2

Media Info

• Features: Figures; References; Tables;
• Pagination: 232 p.

Subject/Index Terms

• TRT Terms: Clay; Consolidation; Deformation; Field studies; Finite element method; Ground settlement; Load factor; Loads; Mathematical analysis; Mathematical models; Motion; Pore pressure; Pressure; Silts; Soil mechanics; Soil stabilization; Soils; Time dependence; Tunnel lining; Tunnels
• Uncontrolled Terms: Soil consolidation
• Old TRIS Terms: Liners; Time dependent parameters; Tunnels /field measurements/
• ITRD Terms: 6471: Analysis (math); 4177: Clay; 5791: Consolidation (soil); 5595: Deformation; 6490: Finite element method; 5567: Load; 6473: Mathematical model; 5483: Movement; 5412: Pressure; 5792: Settlement; 4149: Silt; 4156: Soil; 3374: Tunnel; 3385: Tunnel lining
• Subject Areas: Bridges and other structures; Construction; Design; Geotechnology; Public Transportation; I25: Design of Tunnels; I54: Construction of Tunnels;

Filing Info

• Accession Number: 00450378
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Report/Paper Numbers: UMTA-MA-06
• Files: ITRD, TRIS
• Created Date: Nov 30 1985 12:00AM