TUNNEL ADVANCE RATE PREDICTION BASED ON GEOLOGIC AND ENGINEERING OBSERVATIONS

PREDICTING THE ADVANCE RATE ASSCIATED WITH THE DRIVING OF ANY TUNNEL CAN OBVIOUSLY FACILITATE THE PLANNING AND SCHEDULING OF MAINTENANCE, EQUIPMENT, ETC. THE ADVANCE RATE ASSOCIATED WITH THE STRAIGHT CREEK TUNNEL PILOT BORE WAS COMPARED BY A 'STEP-WISE REGRESSION' ANALYSIS WITH ENGINEERING AND GEOLOGIC VARIABLES DETERMINED EARLY IN THE COURSE OF TUNNEL DRIVING. THE VARIABLES SIGNIFICANTLY AFFECTING ADVANCE RATE AND THE NUMBER OF OBSERVATIONS NECESSARY FOR PREDICTING ADVANCE RATE WERE DETERMINED. THE MODEL DEVELOPED WAS FOUND TO BE QUITE SATISFACTORY AS A PREDICTOR OF THE MEAN ADVANCE RATE; HOWEVER, THE VARIANCE INDICATES AN INCREASE IN INACCURACY AS THE MODEL IS USED BEYOND THE RANGE FOR WHICH IT WAS DEVELOPED. AS DEVELOPED, THIS MODEL WOULD BE USEFUL IN PREDICTING THE COMPLETION DATES FOR SECTIONS OF THE TUNNEL AS WELL AS THE TIME REQUIRED TO COMPLETE THE ENTIRE PROJECT. /TRRL/A/

  • Availability:
  • Authors:
    • Gentry, D W
    • KENDORSKI, F S
    • Abel, J F
  • Publication Date: 1971-9

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Filing Info

  • Accession Number: 00235290
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: TRIS
  • Created Date: Aug 3 1972 12:00AM