ELASTO-PLASTIC CONSOLIDATION ANALYSIS FOR STRUTTED EXCAVATION IN CLAY

Ground movements and strut loads in strutted excavations in clay have been observed to change with time. In this paper, the time-dependent behaviour of the excavation support system is studied by comparing the results of undrained and consolidation analyses with data from an instrumented excavation project. Dissipation of excess pore pressure is modelled using a fully coupled consolidation analysis while the soil is assumed to be an elastic-perfectly plastic material obeying the Mohr-Coulomb yield criterion. The results of the study show that the undrained analysis underestimates the sheet pile wall movement and fail to reflect the progressive movement of the sheet pile. In contrast, these effects are well-predicted by the consolidation analysis, thereby indicating that dissipation of excess negative pore pressure can indeed account for much of the observed progressive ground movement and build-up of strut loads with time. The elasto-plastic consolidation model can also simulate excavation sequence including uneven excavation and time delays in excavation and strutting.(A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0266352X
• Corporate Authors:

  Elsevier Science Publishers

  Crown House, Linton Road
  Barking, Essex IG11 8JU,   England 
• Authors:
  • Yong, K Y
  • Lee, F H
  • Parnploy, U
  • LEE, S L
• Publication Date: 1989

Language

• English

Media Info

• Pagination: p. 311-328
• Serial:
  • COMPUTERS AND GEOTECHNICS
  • Volume: 8
  • Issue Number: 4
  • Publisher: Elsevier
  • ISSN: 0266-352X

Subject/Index Terms

• TRT Terms: Clay; Consolidation; Excavation; Excavations; Mathematical models; Motion; Pore water pressures; Sheet pile walls; Soil stabilization
• ITRD Terms: 4177: Clay; 5791: Consolidation (soil); 5155: Excavation (process); 6473: Mathematical model; 5483: Movement; 5762: Pore water pressure; 3369: Sheet pile wall
• Subject Areas: Geotechnology;

Filing Info

• Accession Number: 00606780
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Mar 31 1991 12:00AM