INTELLIGENT CONSTRUCTION

Transcription

1 MINNESOTA DEPARTMENT OF TRANSPORTATION INTELLIGENT CONSTRUCTION Swedish Transport Administration Visit Rebecca Embacher, M.S., P.E., State Advanced Materials and Technology Engr. September 28, 2015

2 IMPLEMENTATION TIME LINE Intelligent Construction Tools

3 Enhancing Financial Effectiveness Advancement of technologies is increasing accountability of both the Agency and Contractor Implementation of New Technologies Life of Pavements Annual Maintenance Costs Enhancing Financial Effectiveness

4 Enhancing Financial Effectiveness Asphalt Pavements University of Minnesota Industrial Engineer Professor upon completion of a study to determine proper testing rate for HMA density, You should stop worrying about taking the right number of tests. Once this stuff leaves the plant, you have no controls over quality until it s too late. Fix your process, not your testing. Is this really how we want to spend hundreds of millions of taxpayer dollars?

5 Paving Construction Causes of Pavement Failures Material Failure 21% Workmanship 79% Figure Courtesy of Mark Woolaver, VAOT

6 Technologies Technology/Tool QC QA Deployment Intelligent compaction Thermal Profiling (Pave-IR) Intelligent Construction Data Monitoring System (Veta) Digital Test Roller (Ames Compaction Test Rolling Device) 3D Production Monitoring System (3D- PMS) Muck Excavation Ground Penetrating Radar Piloting / Development 2016/2017 Research

7 Intelligent Compaction & Thermal Profiling Implementation Timeline for MN Percent of MnDOT Projects meeting project selection requirements (10-15%) 2016 (40-50%) 2017 (50-75%) 2018 (100%) 2014 (10%)

8 Project Selection Requirements Applications Technology Intelligent Compaction (IC) Paver Mounted Infrared 2360 (Plant Mixed Asphalt Pavement) Thermal * (PMIT) System 2365 (Stone Matrix Asphalt) *IC is recommended for use with 2353 (Ultrathin Bonded Wearing Course), only when used in conjunction with 2360 (Plant Mixed Asphalt Pavement) 6 Lane Miles Specification 2211, 2215, 2331 (Base, FDR, SFDR, CIR) 2353* (Ultrathin Bonded Wearing Course) 2360 (Plant Mixed Asphalt Pavement) 2365 (Stone Matrix Asphalt) Cellular Coverage (at least one time per day)

9 Project Select Decision Tree (Cont.) Thermal Mounted Infrared Temperature System is recommended for use in conjunction with IC on Asphalt Pavement Applications Figure courtesy of Moba Corp.

10 Project Selection Requirements (Cont.) Geospatial Coverage 100% Global Navigation Satellite System (GNSS) Coverage within project limits. Intelligent Compaction: ± 2 inches Horizontally Paver Mounted Infrared Temperature System: ± 4 feet Horizontally

11 MnDOT Support/Review of Data Software Construction Year Report Generation Proprietary 2014 MnDOT Veta MnDOT Veta 4.0* 2016 MnDOT Veta 4.0 or Later 2017 Contractor Veta 4.0 or Later 2018 (Full Deployment) Contractor Veta 4.0 Current MnDOT executed contract

12 Veta Intelligent Compaction All Current Vendors Paver Mounted Infrared Temperature System Scanning System & Static Bar Future Imports: GPR, Smoothness (ProVal Export), Digital Test Rolling QC / QA Spot Tests

13 Intelligent Compaction & Thermal Profiling History 55 Projects on Asphalt Pavements o37 Projects - Intelligent Compaction o48 Projects - Thermal Profiling 26 Projects on Bound/Unbound Materials o11 Projects - Bound (Aggregate Base, FDR, SFDR) o16 Projects - Unbound (Non-Granular, Granular)

14 INTELLIGENT COMPACTION METHOD Specification Highlights 14

15 S-xx.3.D Instrumented Roller System Table S-xx.2 Required Instrumented Roller Equipment Specification Description Quantity Duration GNSS Accelerometer Temperature Additional Requirements 2105, 2106, 2211, 2215, 2331, 2353, 2360, 2365 (Grading & Asphalt Paving Applications) Manufacturer s Intelligent Compaction Computer Software Access to Cloud Storage and Cloud Computing Optional Two (2) User IDs. 1 ID to be provided for use by the Department 14-days prior to certification of the roller(s) until ninety (90) days after final acceptance of all work per MnDOT S-xx.3.D , 2106, 2211, 2215, 2331 (Subgrade/Subbase, Base, FDR, SFDR, CIR) Self-Propelled, Vibratory: Smooth, Single-Drum Steel Smooth, Double-Drum Steel Pad (Sheep s) Foot S-xx.3.D , 2106, 2211, 2215, 2331 (Subgrade/Subbase, Base, FDR, SFDR, CIR) Self-Propelled, Pneumatic Roller S-xx.3.D.2 Duration of Compaction Efforts. S-xx.3.D.3 S-xx.3.D.6 S-xx.3.D.7 S-xx.3.D , 2360, 2365 (Ultrathin Bonded Wearing Course, Plant Mixed Asphalt, Stone Matrix Asphalt) 2360, 2365 (Mixed Asphalt, Stone Matrix Asphalt) Self-Propelled, Vibratory: Smooth Double-Drum Steel Self-Propelled, Pneumatic Roller S-xx.3.D.4 S-xx.3.D.5 15

16 S-xx.3.D.2 Number of Rollers All rollers are required to be instrumented. Instrumented rollers are required for all compaction efforts under MnDOT 2105, 2106, 2211, 2215, 2353, 2360, and Entire Paving Train 100% of Mainline (driving and auxiliary lanes)

17 S-xx.3.C Measurement Passes 100% Mainline including Control Strips Table S-xx.5 Required Measurement Pass Locations Specification Subbase 2105 / 2106 Bases 2211, 2215, 2331 Asphalt Pavement 2353, 2360, 2365 Measurement Pass Location All roller passes on the Top of Subgrade. (When the depth is within 6 ft (2 m) of Grading Grade.) All roller passes on final Grading Grade Lift. All roller passes on each Lift.

18 S-xx.3.G Monetary Price Adjustment - Roller Coverage Roller Coverage (%) Cumulative Measurement Pass Count (all rollers) Includes pneumatic roller Tandem Rollers = 1 Instrumented Roller

19 Roller Coverage Example Rolling Train 2 Breakdown Rollers 1 Intermediate Roller 1 Finishing Roller Cumulative Measurement Pass Count 3 Passes

20 S-x.3.G Monetary Price Adjustment Roller Coverage No longer connected to lump sum payment ( Quality Management Special Lump Sum). Roller Coverage (RC) (%) (Form IC-108) 70 Table S-xx.6 Monetary Price Adjustment for Roller Coverage (RC) Total Price Adjustment Per Lift No Price Adjustment Total Price Adjustment = (20 RC $1400) (LM) < 70 where: RC = Roller Coverage for the given lift, % LM = Total Number of Lane Miles for the given lift, miles (this value includes the driving and auxiliary lanes of the paving/grading operation where use of the IC system is required)

21 S-xx.5 Basis of Payment S-xx.5 The Contract lump sum prices for the Instrumented Roller(s) include all costs related to this Special Provision. The Department will pay for the Instrumented Roller(s) on the basis of the following schedule: Item No. Item Unit Quality Management Special Lump Sum

22 Acceptance Criteria MN has not adopted a stiffness regiment for acceptance o No standardization in stiffness measurements between rollers & vendors. o Large amount of regional material variability (embankment applications) o Composite Measurement o Effected by other properties (moisture, temperature, underlying layers, etc.)

23 MINNESOTA DEPARTMENT OF TRANSPORTATION PAVER MOUNTED INFRARED TEMPERATURE SYSTEM Specification Highlights

24 Table 1. System Requirements Parameter Longitudinal and Lateral Measurements Measurement Width Infrared Temperature Sensors GNSS Requirement 1-ft (300-mm) intervals at all paving speeds Tolerance: ± 1 in (25 mm) Driving lane(s) paved in one (1) pass. Range: 32 F (0 C) to 480 F (250 C) Accuracy: ± 3.6 F (2 C) or ± 2.0% of the sensor reading, whichever is greater. Accuracy of measurements on the asphalt mat: ± 4 feet (1.2 m) in the X and Y Direction Bar Type Scanner Type

25 CL-12R Required: 1ft (±1 in) intervals at all paving Speeds Ensure data acquisition system can keep up with paving speeds CL-12R Lane Avg. Paver Speed 12L-CL 55 ft/min 12L-CL CL-12R 65 ft/min Missing Data ranging from 1.5ft to 4.8ft intervals 12L-CL SP TH

26 S-xx.3.B Measurements Ensure measurements are within 10 ft (3 m) of the trailing edge of the paver screed. Photo Courtesy of Moba Corporation

27 Ensure system is setup correctly to collect thermal measurements across entire paving width. Thermal Profile Width = 8ft Actual Paving Width = 12ft SP TH

28 S-xx.2.B.2 Cloud Computing & Storage Provide department access to the Cloud Storage and Cloud Computing

29 S-xx.G.2 Thermal Segregation Analysis S-xx.3.G.2.a S-xx.3.G.2.b 150-ft sublots Exclude temperatures < 180 F S-xx.3.G.2.c Exclude thermal profile data with 2 ft prior to and 8 ft after paver stops greater than 1 min. in length Paver Stop Paving Direction 2 ft (0.5 m) 8 ft (2.5 m)

30 S-xx.G.2 Thermal Segregation Analysis S-xx.3.G.2.d-e Exclusion of data less than 1 percentile and greater than the 98.5 percentile Range T min T max

31 Sublot Temperature Differential Table S-xx.4 Sublot Temperature Differential Range Range 25.0 F Thermal Segregation Category Low 25.1 < Range 50.0 F Moderate 50.1 F < Range Severe Low Severity (Range =11 F) Medium Severity (Range = 37 F) High Severity (Range = 66 F)

32 Monetary Price Adjustment Thermal Coverage Thermal Coverage (%) 70 Monetary Price Adjustment for Thermal Coverage (TC) Total Price Adjustment Per Lift No Price Adjustment Total Price Adjustment (Deduct) = (20 TC $1400) (LM) < 70 where: TC = Thermal Coverage for given lift, % LM = Total Number of Lane Miles for the given lift, miles

33 Monetary Price Adjustment for Thermal Segregation Thermal data that does not have associated GNSS coordinates will not be used in the calculations to determine thermal segregation. Monetary Price Adjustment for Thermal Segregation Thermal Segregation Adjustment per 150-ft Sublot Category Low $20 incentive Medium No pay adjustment High $20 disincentive

34 MUCK EXCAVATION 3D Production Monitoring System 34

35 3D Production Monitoring Benefits Increases safety. Reduces surveyor inspection time. Addresses limitations with presence of water. Digital, permanent record. Near, real-time creation of surface profile map. Increases surface profile accuracy. Parameter Conventional 3D Monitoring Vertical Accuracy ± 0.5 ft ± 0.2 ft Ground Shots / Grid Every Elevation Change 1-ft

36 3D Production Monitoring System A 3D Production Monitoring System is a Grade Control System that uses either a 3D GNSS or Universal Total Station to document and record excavation depths. The system is integrated with an on-board documentation system that displays a real-time color-coded map of excavation depths, current excavator location, depth above or below design and more.

37 Trimble GCS900 for Excavators Boom Sensor (boom vectors) Body Sensor (pitch & roll of machine) UTS / GNSS Antennas - or - AS450 AS450 AS460 MT900 MS992 Stick Sensor (orientation vectors) Radio (900 mhz) SNR - and- SNM940 On-Machine Modem AS455 Submersible Enclosure Bucket Sensor (Curl / Curl Out) CB460 Onboard machine display Figure Courtesy of Trimble

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39 VisionLink Elevation map

40 IMPORTED SURFACE TO TRIMBLE BUSINESS CENTER

41 DEPTH COLOR SCALE

42 Rolling Surcharge using Dozer

43 HOLES IN THE BUCKET

44 Issue of Mixing of Material

45 DIG TO A DESIGN NOT JUST DIG A HOLE!!!!

46 FOUND MUCK WHERE SURFACE DEPICTED AREAS MISSED

47 Increase in Consistency

48 OVERLAYING SURFACES FOR VOLUME CALCULATION

49 DEVELOPMENT OF VETA Intelligent Construction Data Management System Creation and Development

50 Why Veta? Non-Proprietary Software Low Bid Build Ease of Statewide deployment within State Agency Database Construction Record Correlate to Pavement Performance Compaction Curves Rolling Pattern Development Specification Refinements Training Effects of Paver Stops on Ride Effects of Compaction Efforts on Uniformity and more

51 Real-Time Mapping Veta is a post processing software it does not provide immediate, real-time mapping. Veta is not meant to replace the tools available in proprietary software! Proprietary software is Still Needed: Viewing of near, real-time live Compaction Activities Diagnostic Tools / Administrative Level Alerts Utilization Fleet Health Technology Support And more

52 CURRENT IC FEATURES IN VETA

53 Data Imports Intelligent Compaction All Current Vendors Thermal Profiling (Pave-IR) Scanning System & Static Bar Future Imports: GPR, Smoothness (ProVal Export), Digital Test Rolling QC / QA Spot Tests

54 Map, Edit, Analyze Intelligent Compaction Data

55 Map, Edit Analyze (Thermal Profiling Data)

56 Alignment File Line Work Street Map also available

57 Filters Intelligent Compaction Thermal Profiling

58 Cleaning Data Location Filter

59 Cleaning Data Location Filter Filtering Used: Closed Complex Shape File Ground Shot Coordinates Before Filtering After Filtering

60 Cleaning Data Location Filter Before Filtering After Filtering shoulder Filter Follows linework along curves

61 Create Sublots

62 Spot Tests - Correlations

63 Analyses Uni-Variate Statics Mean, Std. Dev., CoV, Min, Max, Sample Size Geo-Spatial Statistics Semi-Variograms Percent Coverage

64 Correlations & Compaction Curve Development Figures Courtesy of The Transtec Group

65 Lot-by-Lot Analysis

66 Roller Coverage Report

67 Thermal Profile Analysis

68 Paver Stops

69 Temperature Differential

70 POOLED FUND SOLICITATION NO Enhancements to the Intelligent Construction Data Management System (Veta) and Implementation

71 Questions? Rebecca Embacher