00741874

Component

https://doi.org/10.3141/1570-18

http://scholar.google.com...mith&publication_year=1997

Economic conditions in the state of Montana during the past few years have dictated that the time and cost required to collect and analyze deflection data be significantly reduced. Consequently, the Montana Department of Transportation (MDT) undertook the development of an automated deflection analysis procedure (ADAP). This effort resulted in a PC-based Microsoft Windows application that provides a single program to assist the user in each step of the backcalculation analyses, from raw data to generated reports. The ADAP system consists of three components: preprocessor, main processor, and postprocessor. The preprocessor is used to import, validate, and extract deflection data and other pertinent pavement information from the Road Rater and MDT Oracle data base files and to generate the input for the MODULUS backcalculation program. The MODULUS program, which is the main system processor, is used to backcalculate in situ pavement layer moduli. The post processor provides the ability to generate reports and retrieve the analysis results, calculate the structural capacity and remaining life of the pavements in question, and upload the results to the MDT Oracle data base. In addition to providing for a more consistent, productive, and straightforward backcalculation process, the time and resources to perform the analysis of deflection data have been significantly reduced. Initial estimates indicate that instead of the 3 to 4 hr of work that were required for every hour of data collection, only 1 hr is now required, and this time will likely decrease as the MDT staff becomes more familiar with the program.

This paper appears in Transportation Research Record No. 1570, Pavement Research Issues.

English

p. 151-162

1997

Transportation Research Record

0309061539

Figures (9) ; References (5)

Backcalculation; Computer programs; Data analysis; Deflection; Layer coefficient (Pavements); Mathematical analysis; Modulus; Pavements; Productivity; Reports

Layer moduli; Time savings

Montana

Montana

Data and Information Technology; Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces

TRIS, TRB

Oct 2 1997 12:00AM

• ANALYSIS OF LTPP PROFILE DATA FOR JOINTED CONCRETE PAVEMENT SECTIONS
• BACKCALCULATION ANALYSIS OF PAVEMENT-LAYER MODULI USING GENETIC ALGORITHMS
• CRACK DEVELOPMENT IN LINEAR TRACKING TEST PAVEMENTS FROM VISUAL SURVEY TO PIXEL ANALYSIS
• DETECTION AND MONITORING OF CRACKS IN ASPHALT PAVEMENT UNDER TEXAS MOBILE LOAD SIMULATOR TESTING
• DEVELOPMENT OF PROTOTYPE VIDEO-BASED SENSOR FOR VEHICLE DETECTION FROM STAND-STILL IMAGES
• DIPLOBACK: NEURAL-NETWORK-BASED BACKCALCULATION PROGRAM FOR COMPOSITE PAVEMENTS
• DYNAMIC PERFORMANCE OF COMPOSITE PAVEMENTS UNDER IMPACT
• EFFECT OF INITIAL PAVEMENT SMOOTHNESS ON FUTURE SMOOTHNESS AND PAVEMENT LIFE
• EFFECT OF VEHICLE-PAVEMENT INTERACTION ON PAVEMENT RESPONSE
• EVALUATION OF FATIGUE CRACKING
• EVASION OF WEIGHT-ENFORCEMENT STATIONS BY TRUCKS
• INVESTIGATION OF BACKCALCULATED MODULI USING DEFLECTIONS OBTAINED AT VARIOUS LOCATIONS IN A PAVEMENT STRUCTURE
• LINEAR TRACKING PERFORMANCE TESTS ON FULL-DEPTH ASPHALT PAVEMENT
• LINEAR TRACKING RESPONSE MEASUREMENTS: DETERMINING EFFECTS OF WHEEL-LOAD CONFIGURATIONS
• MALFUNCTION DETECTION AND DATA REPAIR FOR INDUCTION-LOOP SENSORS USING I-880 DATA BASE
• PRIMARY RESULTS FOR THE FIRST TEXAS MOBILE LOAD SIMULATOR TEST PAD
• ROADWAY-VEHICLE INTERACTION, PHYSICAL INDEXES, AND HUMAN JUDGMENT OF RIDE QUALITY
• RUTTING DEVELOPMENT IN LINEAR TRACKING TEST PAVEMENTS TO EVALUATE SHELL SUBGRADE STRAIN CRITERION
• SINGLE-MEASUREMENT ESTIMATION OF IN SITU ASPHALT-LAYER MODULI WITH PORTABLE FALLING WEIGHT DEFLECTOMETER
• TEMPERATURE CORRECTION OF BACKCALCULATED MODULI AND DEFLECTIONS USING LINEAR VISCOELASTICITY AND TIME-TEMPERATURE SUPERPOSITION
• USING ARTIFICIAL NEURAL NETWORKS AS A FORWARD APPROACH TO BACKCALCULATION
• USING GEOGRAPHIC INFORMATION SYSTEM TECHNOLOGY TO SYNTHESIZE CENSUS AREAWIDE AND LINEAR HIGHWAY DATA FOR LOCATION OF WEIGH-IN-MOTION SITES