A COMPUTER PROGRAM FOR ESTIMATING COSTS OF HARD ROCK TUNNELLING (COHART)

A computer performs all logic and computations customarily done by hand in preparation of engineer's estimates or contractor's bids on tunnel-shaft systems. The program described is based on construction methods, work forces and equipment selections corresponding to the current state of the art of tunnelling. The program contains logic to permit the estimate of costs of complicated tunnel-shaft systems. In any estimate, the program will accommodate a large number of values or changes in the values of the factors that affect cost, such as tunnel shape and size, shaft depth, rock characteristics, and construction method. To provide great flexibility, the user of the program is provided with the option of selecting lining type and thickness, profit and overhead margins, and other input data. Suggestions for selecting an appropriate value for these inputs are contained in the report. Complete operating instructions and an illustrative example are presented. (Author)

  • Corporate Authors:

    Harza Engineering Company

    150 South Wacker Drive
    Chicago, IL  USA 
  • Authors:
    • WHEBY, F T
    • Cikanek, E M
  • Publication Date: 1970-5

Media Info

  • Pagination: 242 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00039221
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: Final Rpt
  • Contract Numbers: DOT-FR-9-00003
  • Files: TRIS
  • Created Date: Nov 24 1973 12:00AM