INDIAN ROAD SURVEY & MANAGEMENT PVT. LTD. - India

Our CompanyIndian Road Survey and Management Pvt. Ltd. (IRSM)

is a joint venture Company with

Australian Road Research Board (ARRB), Australia

Our PurposeProvide better means to your Road network with

faster , accurate and useful Data collection Techniques

Data Collection is about giving you the right information to make the BEST

DECISIONS about your Valuable network

Why do we collect road data?

Necessity for the collection of information

Current Status: collect data, evaluate

and report

Future Planning: budgeting,

programs, treatment selection

Delivery: preparation for, and actually doing work

Current status report

Policy, standards, budgets

Develop works programs

Detailed design Verification / select option

Procurement

Processing of collected data

Works delivery

Define network & Referencing

Collection of inventory data

Collection of condition data

IRSM HAWKEYE 2000 PROFESSIONAL NETWORK SURVEY VEHICLE

What data will you need?what is it?where is it?

what condition is it in?

Asset InventoryType

NumberCode

DimensionsPosition

Condition

Pavement Monitoring

RoughnessRuttingTexture

CrackingPotholesPatches

Safety AssessmentLane widths

Shoulder widthsClearances

HazardsCurvature

Line marking

All linked to Chainage and GPS

WHY IRSM HAWKEYE 2000 PROFESSIONAL SURVEY VEHICLE

Automated collection basicsData Type Collection Method Outputs

Position dGPS/GPS lat/long

Distance Transducer(DMI) meters

Roughness Laser Profiler IRI

Rutting Laser Profiler mm depth

Texture Laser Profiler mm depth

Condition Defects Digital Images % Area, Severity, Class

Mm , Sq. m.

Baseline Information Digital Images Length, Width, Type

Assets Digital Images Classification

Safety Digital ImagesSafety parameters/Risk

scores

Images Digital Images jpeg/avi/mpeg

Strength FWD microns deflection

The Survey Process

1. Plan and Create Road Reference File

2. Conduct Surveys

3. Process and Export Data

Hawkeye Onlooker Live Interactive and real-time acquisition control interface Display real-time Roughness, Rutting and Texture Can run on a Processing Unit or Laptop Capable of controlling and monitoring all systems simultaneously Customisable to individual survey requirements Graphical display of:

Speed Distance Geometry & GPS maps Camera images

A professional data processing, analysis and reporting tool to enable accurate processing of all parameters collected

Ability to rate individual video frames against chainage and GPS, save images to file and zoom-in to inspect areas of interest

Features such as: data transfer tools survey editing tools video and data editing advanced profiling image stitching asset location

Hawkeye Processing Toolkit

PLAN YOUR SURVEY

LASER PROFILER

DIGITAL PROFILER

Accelerometers Lasers Sensor Hardware Calibrations

Laser Accelerometer Straight Edge

Profiler Components

LASER PROFILER

Analyzing the surface of the road Single point lasers Operating Speed: 1km/h ~ 110km/h Up to 3.6m lane width Responsibilities:- Roughness, Rutting,

Texture, Ride Number

IRI in Practice

2 4 6 8 10 12

Airport Runways,

superhighways

New Pavements

Older Pavements

Maintained Unpaved Roads

Damaged Pavements

Rough Unpaved Roads

IRI

GIPSI TRAC Geometry

Grade Measurement

Cross Slope Measurement

Horizontal Curvature

2Vertical Curvature

Vertical Curvature: Calculated from Rate of change of grade

GEOMETRY MAP

Trimble DGPS DGPS sub-metre Accuracy Mapping Shape files Lattitude,Longitude and Alltitude Georefrencing

DGPS

GPS MapData plot of GPS information.Fill GPSFeature used approximate GPS location using Gipsitrac data.

Shape file Outputs

Digital Cameras

High Resolution Color 1624 x 1234 (2 Megapixel)

Firewire Technology Images stored direct to PC Up to 7 images per second Variable driving speed Images positioned at set distance intervals Manual pan and tilt (Azimuth & Elevation) Electronic Zoom Automatic Exposure Control

3What type of data is collected

Imaging data

3What is Imaging Data used for?

Asset information Trafficable Width Seal Width Carriageway Width Road Safety

Inventory identification Signs Line marking Kerb and channel Traffic islands

Pavement View Camera - Dual

Crack and/or Distresses can be Measured/Classified

Reflection Crocodile Longitudinal Transverse

Edge Break Patching Bleeding Shoving

Corrugation Pothole Ravelling Delamination

MAINTAINANCE Of Roads IS Important-By Visual Data Condition

Hawkeye Processing Toolkit Customizable Rating Form

Report Graphs and Table

Reports

Data Reports for HDM4

Professional office software for Hawkeye data collection products

Easy-to-use Windows-based design High powered processing options for

Hawkeye data

Pavement assessment

Asset location

Roughness, rutting, texture and road geometry

Network snapshots

Condition reporting

Hawkeye Processing Toolkit Office Based Software

What is pavement strength? The ability of a pavement structure to carry a cumulative repeated heavy

axle loading before the pavement shows unacceptable signs of structural and surface distress which seriously compromise its function

By back-analysis of the shape of the bowl of a deflection measurement (depth of bowl, and curviness of the seat of the bowl), we are able to estimate parameters such as pavement structural strength, stiffness, material strengths of the pavement layers, including the subgrade

Ultimately, we can estimate remaining strength (or capacity) as defined above, and if we also know the traffic loading, Remaining Life in years

Furthermore, pavement deflection measurement is non-destructive

Principle of Deflection testing

What is pavement strength?

pavement deflection bowl shape under a standard load

Why pavement strength?

Why consider pavement surface and structural performance ? pavements are designed on structural principles, but have tended to be

managed by surface (functional) condition a surface structural approach permits the manager to distinguish between

rough & weak and rough & strong , and smooth & strong and smooth & weak

Then, spend money effectively, by triggering structural works for structural reasons, and surfacing works for functional reasons

Pavement strength testing -typesThree main device types are used for collecting

deflection data at network level:

Benkelman Deflection Beam (BDB) Deflectograph (DFG) Falling Weight Deflectometer (FWD/HWD) High Speed Deflection Testing (under

development)

Benkelman Beam & Deflectograph

Benkelman Beam with automated

deflection recording

Benkelman Beam with manual

deflection recording

Benkleman Beam with automated deflection

recording

Benkleman Beam with manual deflection

recording

Falling Weight Deflectometer

FWD Advantages A non-destructive test device for structural condition

evaluation of Pavement. Accurate and fast (up to 60 test points/hr). Realistic pavement loading levels with Wide loading

range: (7-160 kN) Ability to Measure and Record a deflection basin. High Productivity Excellent repeatability. Ideal for mechanistic/analytical design approaches Nine Configurable geophone arrangements to suit rigid

pavement testing and flexible pavements

FWD case studyMaximum Deflection - Barkly Highway Ch 0 to CH 257.900

-0.25

0.25

0.75

1.25

1.75

2.25

2.75

0.000 50.000 100.000 150.000 200.000 250.000

Chainage (km)

Def

lect

ion

(mm

)

DeflectionCharacteristic DeflectionMean Deflection

Data Adjustments

Actual Load Temperature Season Device

0.90

0.95

1.00

1.05

1.10

1.15

1.20

1.25

1.30

1.35

1.40

0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300Asphalt thickness (mm)

Deflection Standardisation

Factor

40kN FWD

Deflectograph

Benkelman Beam

FWD Adjustments

Spreadsheet for 2004 Austroads Pavement Rehabilitation Guide Chart-Based Procedure for Asphalt Overlay Thickness Design

Deflection device usedSeasonal Correction Factor 1Asphalt binder type 1Table 6.4 fatigue factor 3

WMAPT 25

MeasuredFWD Do D200 MAT WMAPT

Stress Do D200 Do D0- D200 Do D0- D200 Do D0 - D200(kPa) (mm) (mm) (mm) (mm) (mm) (mm) (C) (C) (mm) (mm) (mm) (mm)

Test Road 100 5.00E+06 700 1.200 0.700 0.970 0.566 0.970 0.404 35 25 0.880 0.301 1.060 0.301Test Road 200 5.00E+06 700 1.100 0.700 0.889 0.566 0.889 0.323 35 25 0.807 0.241 0.972 0.241Test Road 300 5.00E+06 700 1.000 0.700 0.809 0.566 0.809 0.243 35 25 0.733 0.180 0.883 0.180Test Road 400 5.00E+06 700 0.950 0.700 0.768 0.566 0.768 0.202 35 25 0.697 0.150 0.839 0.150Test Road 500 5.00E+06 700 0.900 0.700 0.728 0.566 0.728 0.162 35 25 0.660 0.120 0.795 0.120Test Road 600 5.00E+06 700 0.890 0.700 0.720 0.566 0.720 0.154 35 25 0.653 0.114 0.786 0.114Test Road 700 5.00E+06 700 0.885 0.700 0.716 0.566 0.716 0.150 35 25 0.649 0.111 0.782 0.111Test Road 800 5.00E+06 700 0.880 0.800 0.712 0.647 0.712 0.065 35 25 0.645 0.048 0.777 0.048Test Road 900 5.00E+06 700 1.100 0.800 0.889 0.647 0.889 0.243 35 25 0.807 0.180 0.972 0.180Test Road 1000 5.00E+06 700 1.200 0.800 0.970 0.647 0.970 0.323 35 25 0.880 0.241 1.060 0.241Test Road 1100 5.00E+06 700 1.000 0.800 0.809 0.647 0.809 0.162 35 25 0.733 0.120 0.883 0.120Test Road 1200 5.00E+06 700 1.250 0.800 1.011 0.647 1.011 0.364 35 25 0.917 0.271 1.104 0.271Test Road 1300 5.00E+06 700 1.350 0.800 1.092 0.647 1.092 0.445 35 25 0.990 0.331 1.192 0.331

Select binder type of asphalt overlay

Correction for WMAPT

Correction Factor for Seasonal Variation

Select Benkelman Beam, Deflectograph or FWD

Design Traffic Loading

(ESA)

see Section 6.2.2.2 Austroads Pavement Rehabilitation Guide

Road Name Chainage

Correction for FWD to 40 kN

Correction for Deflection Device

FWD Adjustments

Example FWD Data

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

1.60

0 200 400 600 800 1000 1200 1400

Chainage (m)

Def

lect

ion

(mm

)

0

20

40

60

80

100

120

140

160

Asp

halt

Ove

rlay

Req

uire

d (m

m)

Measured Deflection Additional Asphalt Required

Design Deflection : 0.95mm

Remaining LifeBarkly Highway Eastbound - Estimated Remaining Life of Sections

0.00E+00

1.00E+06

2.00E+06

3.00E+06

4.00E+06

5.00E+06

6.00E+06

7.00E+06

8.00E+06

9.00E+06

1.00E+07

0 5 10 15 20 25 30 35 40Year

Rem

aing

Life

in E

SAs

0 - 20.542 km26.684 - 60.317 km142.033 - 147.316 km177.149 - 182.439 km182.439 - 189.54All other sections

Year 1 - current loading of 23,000 ESAsYear 2 - current plus 31 unladen trucks per day = 56,673 ESAsYear 2 - current plus 61 unladen trucks per day = 89,261 ESAsYear 3 and on - current plus 91 unladen trucks = 121,848 ESAs

Back-calculation results

153414313101.53797.46415192368097.41491.02815376494290.97860.36712117180560.31726.73515322306626.68420.59215158216320.5420

Subgrade CBR (%)(Max 15)

Subgrade mean

modulus (MPa)

Base mean

modulus (MPa)

Subsection to (km)

Subsection from (km)

For More Information:-

INDIAN ROAD SURVEY & MANAGEMENT PVT. LTD

H84, Plot No.1421, 13th Main RoadAnna Nagar, Chennai 600040INDIAPh: 044 - 42612401 / 02 / 03 Fax: 91 - 44- 43500005Email:-info@irsm.in

Discussion / Questions ?

THANK YOU