The Latest Infrastructure Inspection Technology

November, 2018

Hiroyuki KatoVice President

NEXCO-West USA, Inc.

Background : NEXCO-West

1

Used be a government agency (Japan Highway) Privatized in 2005 and became NEXCO-West

Pilot project in Florida Keys (August, 2009)

2

Motivation

Measuring Crack Spacing

NBI Rating

Structurally

Deficient

(SD)

Chain Drag during Lane Closure

3

AASHTO Element Level Inspection

Condition State Description

1 Good

2 Fair

3 Poor

4 Severe

Rating Description

9 Excellent

8 Very good

7 Good

6 Satisfactory

5 Fair

4 Poor

3 Serious

2 Critical

1 Imminent Failure

0 Failed

MAP-21 requires to report

Element Level Inspection Results for National Highway

Systems

Routine inspection every 2 years (mainly by Visual and hands-on inspection)

Current practice for bridge deck inspection

Chain Dragging and Hammer Sounding technique are widely used

4

Deck Top Scanning System (DTSS)

IR cameraLine scan camera

Line scan camera

Line scan camera

IR camera

Raw and processed IR image

Visual image

13″ (4 m)

5

Infrared Thermography Technology

6

Benefit

7

Deficiency Map for Bridge Decks

8

Liberty St.

North Bound

South Bound

South

DelaminationUnsound patch

Our Experience – Network inspection

9

Our Experience (Long distance inspection)

10

Our Experience (Building in France)

1111

Current Project (Subway Tunnel)

1212

360°Concrete Surface Evaluation

13

Sub-surfaceEvaluation

Surface Evaluation

Highway SpeedInspection

Stationary Inspection

Long DistanceImaging

Short Distance PrecisionImaging

14

Introducing the US product to Japan

15

We are serving as a ‘Bridge’ between U.S. and Japan to exchange latest technologies for their mutual benefit

Bridge between U.S. and JapanExchange of: - Knowledge- Experience- Technologies

16

Thank you very much! ありがとうございました。

Hiroyuki Kato

Vice PresidentNEXCO-West USA, Inc.

h.kato@w-nexco-usa.com

http://www.w-nexco-usa.com/