A computer simulation model called SFPSIM has been developed in the SIMSCRIPT 11.5 language which attempts to incorporate the main interactions that can occur during typical paving operations. The computer analysis enables the determination of the optimum number of trucks to employ for any batch plant location and their scheduling. A diagram is presented of the typical slipform paving operation. Time lapse photography equipment was used to collect typical time data for the components. Pictures were taken at a rate of one frame every 4 seconds. The duration of each job operation was determined by counting the number of frames in which that operation occured and multiplying by 4 seconds. Typical frequency distributions were thus obtained of the times required to service a truck at the wash-out area, load at the plant and unload at the paver. Stop watch readings while riding the truck yielded the truck speeds for each part of the cycle. The time distributions were fed into the simulation. Frequency distributions for the time between equipment failures and the downtimes expected at each failure were also incorporated into the program. A diagram is presented of the flow chart of the logic used in the computer program which is designed to be flexible enough to model almost any normal slipform project. Some of the parameters that may be specified are listed. The types of questions that may be answered are illustrated by examination of selected results for a typical pavement 21,600 ft long, 9 in. thick, 24 ft wide, dual lane.

  • Corporate Authors:

    Dun Donnelley Publishing Corporation

    222 South Riverside Plaza
    Chicago, IL  United States  60606
  • Authors:
    • Willenbrock, J H
  • Publication Date: 1973-6

Media Info

  • Features: Figures;
  • Pagination: p. 144-146
  • Serial:
    • Roads and Streets
    • Volume: 116
    • Issue Number: 6
    • Publisher: Donnelley (Reuben H) Corporation

Subject/Index Terms

Filing Info

  • Accession Number: 00261755
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 6 1974 12:00AM