CALCULATION OF CONCRETE TUNNEL LININGS WITH CONSIDERATION OF A CHANGE IN THE DESIGN MODEL IN THE CASE OF CRACKING

The lining is calculated according to a program in which the rock is regarded as a winkler elastic foundtion and the lining is represented in the form of a polygonal frame having elastic supports at the nodes. The calculation sequence is detailed. The results of the caluclations for a circular tunnel lining are presented which shows the standard bearing capacity of the structure as a function of the specific passive resistance of the rock in the case of loading by vertical rock pressure in the presence and absence of free-flowing water in the tunnel. The study found that the model for calculating the strength of the extended zone of concrete tunnel linings gives results unjustifiably understating their hearing capacity, since elimination of the extended zone does not lead to loss of the bearing capacity of the lining in the presence of the passive resistance of the rock. The design model with the formation of 3 pliable hinges determines the long-term strength of the concrete lining, and on introducing the overload coefficient n=1.5 yields the design bearing capacity. Further observations and conclusions from the study are also listed.

• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Mordovina, A N
• Publication Date: 1976-9

Media Info

• Features: Figures; References;
• Pagination: p. 874-867
• Serial:
  • Hydrotechnical Construction
  • Volume: 9
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Bearing capacity; Calculation; Concrete; Design; Mathematical models; Passive restraint systems; Rocks; Strength of materials; Tunnel lining; Tunnels
• Uncontrolled Terms: Computation; Models
• Old TRIS Terms: Circular tunnels
• Subject Areas: Bridges and other structures; Design; Geotechnology; Highways;

Filing Info

• Accession Number: 00157187
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 16 1978 12:00AM