SUBSIDENCE OVER SOFT GROUND TUNNEL

Knowing the potential causes of and being capable of reducing subsidence during a tunneling operation is important, as well as means of forecasting the magnitude and distribution of settlements prior to tunneling. This paper describes the existing soil and ground water conditions encountered, as well as the construction procedures used in advancing a machine-mined tunnel in soft ground. Settlement data obtained from a comprehensive instrumentation program performed during tunnel construction are presented. A favorable comparison is made between the data obtained for the tunnel in question and that published for other soft ground tunnels. This comparison makes it possible to apply a mathematical expression (the error function) to approximate the subsidence profile. An overall look at soil responses to construction practices and shield dimensions further substantiates findings that the magnitude of subsidence obtained in soft ground tunneling is directly related to the soil encountered and techniques used to reduce the magnitude of source disturbance in the area of tunneling.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/3519342
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Butler, R A
  • HAMPTON, D
• Publication Date: 1975-1

Media Info

• Pagination: p. 35-49
• Serial:
  • Journal of Geotechnical and Geoenvironmental Engineering
  • Volume: 101
  • Issue Number: 1
  • Publisher: American Society of Civil Engineers
  • ISSN: 1090-0241
  • Serial URL: http://ojps.aip.org/gto

Subject/Index Terms

• TRT Terms: Excavation; Groundwater; Soft soils; Soil mechanics; Soil stabilization; Soils; Subsidence; Tunneling
• Uncontrolled Terms: Soil conditions
• Old TRIS Terms: Excavation technology
• Subject Areas: Bridges and other structures; Construction; Geotechnology; Highways;

Filing Info

• Accession Number: 00095274
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Jul 15 1975 12:00AM