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Title:

OPTIMIZING EARTH MOVING PLANT: SOLUTION FOR THE EXCAVATOR-TRUCKS SYSTEM

Accession Number:

00215686

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309021871

Abstract:

THE PAPER REPORTS A CONVENIENT GRAPHICAL SOLUTION FOR THE OPTIMIZATION OF AN EXCAVATOR-TRUCK EARTHMOVING SYSTEM BY CONSIDERING IT AS A CYCLIC QUEUING SYSTEM. FOUR DIFFERENT SITUATIONS ARE ANALYZED WITH REFERENCE TO THE VARIABILITY OF THE SERVICE TIME OF THE EXCAVATOR AND THE TRANSIT TIME OF THE TRUCKS: CONSTANT SERVICE TIME AND CONSTANT TIME (A FIGURE ILLUSTRATES REGIONS OF OPTIMAL N); RANDOM (NEGATIVE EXPONENTIALLY DISTRIBUTED) SERVICE TIME AND RANDOM TRANSIT TIME; CONSTANT SERVICE TIME AND RANDOM TRANSIT TIME; AND RANDOM SERVICE TIME AND CONSTANT TRANSIT TIME. THE PROBLEM IS STATED AND ILLUSTRATED DIAGRAMATICALLY. MATHEMATICAL SOLUTIONS ARE PRESENTED FOR THE FIRST THREE SITUATIONS AND THE SOLUTION OF THE FOURTH SITUATION IS OBTAINED VIA SIMULATION. THE OPTIMUM NUMBER OF TRUCKS IS DETERMINED AS A FUNCTION OF TWO RATIOS--COST PER HOUR OF EXCAVATOR/COST PER HOUR OF TRUCK AND TRANSIT TIME/SERVICE TIME. THE UNIT COSTS OF EARTHMOVING ARE OBTAINED AS A FUNCTION OF TRANSIT TIME/SERVICE TIME AND THE OPTIMUM NUMBER OF TRUCKS, N. HERE IS A POINT AT WHICH OPTIMAL VALUES OF N ARE INDEPENDENT OF THE VARIABILITY OF SERVICE AND TRANSIT TIMES. THIS GRAPHICAL SOLUTION IS SIMPLE AND EXPEDIENT FOR USE BY THE MAN AT THE SITE.

Supplemental Notes:

Publication of this paper sponsored by Committee on Construction Management. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

Monograph Title:

Construction

Monograph Accession #:

01410367

Authors:

CABRERA, J G
MAHER, M J

Pagination:

pp 7-15

Publication Date:

1973

Serial:

Highway Research Record

Issue Number: 454
Publisher: Highway Research Board

Conference:

52nd Annual Meeting of the Highway Research Board

Location: Washington District of Columbia, United States
Date: 1973-1-22 to 1973-1-26

ISBN:

0309021871

Media Type:

Digital/other

Features:

Figures (7) ; References (5)

Old TRIS Terms:

Subject Areas:

Construction; Finance; Highways; Motor Carriers

Files:

TRIS, TRB

Created Date:

Jun 5 1974 12:00AM

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