IMPROVED THERMAL COMPUTATIONS FOR ARTIFICIALLY FROZEN SHAFT EXCAVATIONS

Artificial ground freezing (AGF) techniques are widely used by civil and mining engineers to assist in the construction of shafts, tunnels, and other structures. The ground is frozen by a coolant circulated through pipes inserted in the ground in order to create a cofferdam that will exclude ground water and provide structural support. Formulas by Sanger and Sayles are often used to estimate the growth of the freeze. The theoretical basis of these formulas is critically examined and an alternative method of computing the extent of the frozen ground is given. The alternative method is based on some of the ideas of Sanger and Sayles and requires the numerical solution of one diffusion equation over a finite interval. Numerical results are presented using typical data for granular soils with several different dry densities and water contents.

• 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:
  • Holden, J T
• Publication Date: 1997-8

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 696-701
• Serial:
  • Journal of Geotechnical and Geoenvironmental Engineering
  • Volume: 123
  • Issue Number: 8
  • Publisher: American Society of Civil Engineers
  • ISSN: 1090-0241
  • Serial URL: http://ojps.aip.org/gto

Subject/Index Terms

• TRT Terms: Calculation; Cofferdams; Computer aided design; Dry density; Formulas; Frozen soils; Granular soils; Ground freezing; Groundwater; Numerical analysis; Structural supports; Theory; Tunneling
• Old TRIS Terms: Computations; Dry density (Soils); Groundwater control; Numerical solution
• Subject Areas: Bridges and other structures; Construction; Geotechnology; Highways; I54: Construction of Tunnels;

Filing Info

• Accession Number: 00740115
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 12 1997 12:00AM