Falling Weight Deflectometer Usage (2008) / Chapter Skim
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Pages 76-134
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From page 76... ...
Senior Pavement Research Engineer Maine Department of Transportation Falling Weight Deflectometer Coordinator Maryland State Highway Administration Assistant Division Chief Michigan Department of Transportation FWD Specialist, Pavement Performance Engineer Minnesota Department of Transportation Deflection Testing and Analysis Mississippi Department of Transportation FWD and Field Operations EIT Missouri Department of Transportation Pavement Engineer Montana Department of Transportation NDT Supervisor Nevada Department of Transportation Senior Materials Supervisor New Mexico Department of Transportation Geologist Manager New Jersey Department of Transportation Principal Engineer North Carolina Department of Transportation, Pavement Management Unit TE II -- Pavement Design/ Analysis Engineer North Dakota Department of Transportation Transportation Engineer New york State Department of Transportation Civil Engineer 2 Ohio Department of Transportation Pavement Research Engineer Oregon Department of Transportation Pavement Design Engineer Pennsylvania Department of Transportation, Bureau of Maintenance and Operations Roadway Programs Specialist Rhode Island Department of Transportation Principal Civil Engineer continued
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From page 77... ...
Ages of FWDs (years, average) Dynatest 61 14.33 Foundation Mechanics 15 5.71 KUAB 6 13.50 Carl Bro 0 Not applicable Other 0 Not applicable Total 82 11.18 FiguRe B1 survey response to Questions 2-6: "how many FWDs does your agency use?
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TABLE B3 SURVEy qUESTION 8: "IF NOT, PLEASE DESCRIBE yOUR FWD MAINTENANCE ACTIVITIES: INCLUDE SCHEDULING AND ACTIVITy DESCRIPTIONS" State Response Alaska Lubrication once a year. Relative calibration annually.
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vendor. New york Our Equipment Management Facility at Waterford performs regular maintenance of FWD vehicles.
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FiguRe 3 survey response to Question 29, "What kind of flexible pavement field testing manual does your agency use? " question 10: Who performs maintenance activities on the FWD vehicles your agency uses?
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. Annual calibration at Denver, Colorado, facility.
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" question 13: If yes, how often do you perform relative calibrations? FiguRe B6 survey response to Question 13: "if yes, how often do you perform relative calibrations?
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FiguRe B8 survey response to Question 15: "Whose procedure do you follow to perform a relative calibration? " (if you choose other, please specify your procedure -- including load magnitudes and repetitions -- in the space below, or provide a copy to fwdsurvey@ste-group.com.)
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? FiguRe B10 survey response to Question 17, organized by facility name and location: "Where do you have your reference calibrations done?
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question 18: If your agency does require calibration, how far must the equipment typically travel? FiguRe B12 survey response to Question 18, reference calibrations: "if your agency does require calibration, how far must the equipment typically travel?
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FiguRe B14 survey response to Question 19, relative calibrations: "if your agency does require calibration, what is the approximate cost per calibration session, including total labor, materials, travel, and incidental expenses?
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FiguRe B16 survey response to Question 20: "Would your agency favor additional calibration centers?
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" parT 5: GeneraL FWd TesTinG procedures question 22: How many crew members do you use to operate an FWD unit on a typical project? FiguRe B18 survey response to Question 22: "how many crew members do you use to operate an FWD unit on a typical project?
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FiguRe B19 survey response to Question 23: "What facilities do you test with the FWD? " (Check all that apply.)
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" question 26: Is there an equipment inspection checklist prior to testing? FiguRe B22 survey response to Question 26: "is there an equipment inspection checklist prior to testing?
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" question 28: Who provides traffic control? FiguRe B24 survey response to Question 28: "Who provides traffic control?
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" question 30: How much time does a complete flexible pavement network-level FWD testing cycle take? FiguRe B26 survey response to Question 30: "how much time does a complete flexible pavement network level FWD testing cycle take?
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" question 32: For any given flexible pavement project, approximately how soon before the project starts does your agency perform FWD tests? FiguRe B28 survey response to Question 32: "For any given flexible pavement project, approximately how soon before the project starts does your agency perform FWD tests?
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FiguRe B30 survey response to Question 34: "Where on flexible pavements are data collected? " (Check all that apply.)
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FiguRe B31 survey responses to Question 35, Project level (including Forensics) : "For each of the following levels, describe your flexible pavement measurement variables, where applicable."
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TABLE B6 SURVEy qUESTION 35: "FOR EACH OF THE FOLLOWING LEVELS, DESCRIBE yOUR FLEXIBLE PAVEMENT MEASUREMENT VARIABLES, WHERE APPLICABLE." OTHER FLEXIBLE PAVEMENT TESTING VARIABLES AT THE PROJECT LEVEL (INCLUDING FORENSICS) Responding State Other Testing Variables Alabama All projects more than 1 mile in length are tested every two-tenths of a mile.
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89 question 36: Network level FiguRe B32 survey responses to Question 36, network level: "For each of the following levels, describe your flexible pavement measurement variables, where applicable."
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20 min Note: -- = no response given. TABLE B8 SURVEy qUESTION 36: "FOR EACH OF THE FOLLOWING LEVELS, DESCRIBE yOUR FLEXIBLE PAVEMENT MEASUREMENT VARIABLES, WHERE APPLICABLE" OTHER FLEXIBLE PAVEMENT TESTING VARIABLES AT THE NETWORK LEVEL Responding State Other Testing Variables Alaska No temp gradient holes are done.
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91 question 37: Research level FiguRe B33 survey responses to Question 37, Research: "For each of the following levels, describe your flexible pavement measurement variables, where applicable."
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question 38: Other levels TABLE B11 SURVEy qUESTION 38: "FOR EACH OF THE FOLLOWING LEVELS, DESCRIBE yOUR FLEXIBLE PAVEMENT MEASUREMENT VARIABLES, WHERE APPLICABLE" (OTHER LEVELS USED) Responding State Description Loading Conditions Sensor Spacings Temperature Gradient Holes Other Testing Variables Alaska Airport -- B747 4 replicate drops at 55 kips each 0, 8, 12, 24, 36, 48, 60, and 72 in.
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FiguRe B34 survey response to Question 39: "under which of these conditions is flexible pavement testing not allowed? " (Check all that apply.)
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" question 42: For rigid pavement at the network level, are FWD tests done before the project starts, after the project is completed, or both? FiguRe B37 survey response to Question 42: "For rigid pavement at the network level, are FWD tests done before the project starts, after the project is completed, or both?
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" question 44: For any given rigid pavement project, approximately how soon after the project is completed does your agency perform FWD tests? FiguRe B39 survey response to Question 44: "For any given rigid pavement project, approximately how soon after the project is completed does your agency perform FWD tests?
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FiguRe B40 survey response to Question 45: "Where on rigid pavements are data collected? " (Check all that apply.)
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FiguRe B41 survey responses to Question 46, Project level (including Forensics) : "For each of the following levels, describe your rigid pavement measurement variables, where applicable."
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TABLE B13 SURVEy qUESTION 46: "FOR EACH OF THE FOLLOWING LEVELS, DESCRIBE yOUR RIGID PAVEMENT MEASUREMENT VARIABLES, WHERE APPLICABLE." OTHER RIGID PAVEMENT TESTING VARIABLES AT THE PROJECT LEVEL (INCLUDING FORENSICS) Responding State Other Testing Variables Alabama All projects more than 1 mile in length are tested every two-tenths of a mile; projects less then 1 mile are tested every tenth of a mile.
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99 question 47: Network level FiguRe B42 survey responses to Question 47, network level: "For each of the following levels, describe your rigid pavement measurement variables, where applicable."
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1 min Note: -- = no response given. TABLE B15 SURVEy qUESTION 47: "FOR EACH OF THE FOLLOWING LEVELS, DESCRIBE yOUR RIGID PAVEMENT MEASUREMENT VARIABLES, WHERE APPLICABLE" OTHER RIGID PAVEMENT TESTING VARIABLES AT THE NETWORK LEVEL Responding State Other Testing Variables Alaska No temperature gradient holes are done.
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101 question 48: Research level FiguRe B43 survey responses to Question 48, Research: "For each of the following levels, describe your rigid pavement measurement variables, where applicable."
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TABLE B17 SURVEy qUESTION 48: "FOR EACH OF THE FOLLOWING LEVELS, DESCRIBE yOUR RIGID PAVEMENT MEASUREMENT VARIABLES, WHERE APPLICABLE" OTHER RIGID PAVEMENT TESTING VARIABLES FOR RESEARCH Responding State Other Testing Variables California Recorded data for temperature is ambient and pavement surface. Colorado We test when requested and researchers let us know what they want.
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FiguRe B44 survey responses to Question 50: "under which of these conditions is rigid pavement testing not allowed? " (Check all that apply.)
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FiguRe B46 survey responses to Question 52, by title and by vendor: "What is the name of the FWD data collection software used in the field? " (separate multiple names and versions with commas.)
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use? FiguRe B48 survey response to Question 54: "What operating system does your FWD unit(s)
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FiguRe B50 survey response to Question 56: "What software is used to perform data quality checks in the field? " (separate multiple names and versions with commas.)
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FiguRe B53 survey response to Question 59: "What software is used to perform layer modulus calculations using FWD data? " (separate multiple names and versions with commas.)
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" parT 10: daTa ManaGeMenT and sToraGe question 61: Are FWD program and configuration backups stored in the FWD vehicle? FiguRe B55 survey response to Question 61: "are FWD program and configuration backups stored in the FWD vehicle?
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FiguRe B56 survey response to Question 62: "Does the FWD operator back up FWD data files to any external media (e.g., floppy disks, CD-RoM, usB flash drive, etc.) prior to leaving the test site?
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" question 65: How many months of training is required for new FWD data analysts? FiguRe B59 survey response to Question 65: "how many months of training is required for new FWD data analysts?
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TABLE B18 SURVEy qUESTION 67: "DOES yOUR AGENCy PROVIDE TRAINING TO FWD OPERATORS? IF yES, PLEASE DESCRIBE" Responding State FWD Operator Training Description Alabama Alabama provides in-house training for our FWD operator; the junior operator is paired with a senior operator for 6 months to get a feel for different testing situation.
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question 68: Does your agency provide training to FWD data analysts? FiguRe B61 survey response to Question 68: "Does your agency provide training to FWD data analysts?
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TABLE B19 SURVEy qUESTION 69: "DOES yOUR AGENCy PROVIDE TRAINING TO FWD DATA ANALySTS? IF yES, PLEASE DESCRIBE" Responding State FWD Operator Training Description Alabama On-the-job training.
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TABLE B20 SURVEy qUESTION 71: "DOES yOUR AGENCy HAVE A CERTIFICATION PROGRAM FOR FWD OPERATORS? IF yES, PLEASE DESCRIBE" Responding State FWD Operator Training Description South Carolina Must ride with certified operator for a period of time to show proficiency and pass test to operate.
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question 74: Does your agency send representatives to the annual FWD User's Group meeting? FiguRe B64 survey response to Question 74: "Does your agency send representatives to the annual FWD user's group meeting?
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FiguRe B66 survey response to Questions 76 and 77: "how many full-time staff are involved with your FWD program? if you answered others, please describe." question 78: Have there been any FWD-related accidents within the past 5 years?
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FiguRe B69 survey response to Question 80: "Please describe the type(s) and severity*
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in effect for your entire FWD program (e.g., data collection, data analysis, data storage, maintenance, etc.)
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TABLE B21 SURVEy qUESTION 84: "IF OUTSOURCED, WHAT ARE THE CONTRACT REqUIREMENTS FOR PERSONNEL TRAINING, EqUIPMENT CALIBRATION, DATA qUALITy, AND OTHER DELIVERABLES? " Responding State Contract Requirements Alaska Outsourced activities involve using the state's FWDs and personnel to collect data off state property (e.g., for the U.S.
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TABLE B23 SURVEy qUESTION 86: "WHAT PERCENTAGE OF yOUR FWD PROGRAM BUDGET IS DEDICATED TO EACH OF THE FOLLOWING LEVELS? " "IF yOU ANSWERED OTHER ABOVE, PLEASE DESCRIBE" Responding State Description of Other Activities California Most work is done for project-level testing.
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Additional FWD features have also been added for future data analysis. Connecticut We have not yet implemented an FWD program.
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TRB Transportation Research Board TSA Transportation Security Administration U.S.DOT United States Department of Transportation
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TRaNSPoRTaTioN ReSeaRCH BoaRD 500 Fifth Street, n W W ashington, dC 20001 a D D R eSS SeR viCe R eq UeSTeD
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