DEFORMATIONAL CONTROL IN EXCAVATING UNSTABLE SLOPES

Rock bolting is not a commonly used tool for stabilizing rock slopes; however, its use in stabilizing large slopes in very poor rock is demonstrated here. During the excavation of double silos for a large pumped water storage hydroelectric scheme, multiple slope failures occurred. Further excavation has been suspended until stabilization and excavation processes are determined. Extensive geological and numerical modeling, followed by sensitive monitoring with ongoing construction, is required. Deformations are predicted using a mechanistic finite element method. The installed monitoring system with predicted deformations is used to control construction and support requirements. If the measured deformations exceed the predicted deformations by more than 30% to 100%, depending on the class of rock, then reasons for these differences are determined before further excavations are performed.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339410
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Chappell, B A
• Publication Date: 1987-4

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 299-319
• Serial:
  • Journal of Geotechnical Engineering
  • Volume: 113
  • Issue Number: 4
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9410

Subject/Index Terms

• TRT Terms: Deformation; Finite element method; Forecasting; Monitoring; Rock bolting; Rock excavation
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00472475
• Record Type: Publication
• Report/Paper Numbers: Paper No. 21382
• Files: TRIS
• Created Date: Aug 31 1987 12:00AM