Civil Engineering Activities of...

June 13-14th, 2016

Civil Engineering Activities of EJECbased on

Construction and Maintenance Circumstances of

Road Transportation Infrastructures in Japan

Atsushi MORI Vice Head, Ph.D.

Eight-Japan Engineering Consultants Inc. (EJEC)

Department of Disaster Mitigation and Facility Maintenance

Technical Seminar on Road Transportation Infrastructure for ASEAN Integration

Keynote Speech

Profile of Atsushi MORI

Page ・ 1

Professional Engineer（Japan） in Structural Engineering

Member of Committees in JSCE(Japan Society of Civil Engineers),

JAEE(Japan Association for Earthquake Engineering) and

JRA(Japan Road Association).

BE in Civil Engineering, Saitama University, Japan, in 1984

Ph.D. in Civil Engineering, University of Canterbury , New Zealand, in 1993

Experience of Consultant for 32 years

Main Fields and Projects (including ongoing projects):

- Building Disaster and Climate Resilient Cities in ASEAN

- Seismic Design and Seismic Retrofit for Bridges, Underground Structures, etc.

- Risk Reduction Planning for Natural Disasters

- Development of New Seismic Design Procedure for Bridges by Considering

Severe Damages Suffered due to the 1995 Kobe Earthquake

- Planning and Design of Bridges

Eight-Japan Engineering Consultants Inc. (ＥＪＥＣ)

Page ・ 2

CONTENTS


◆ Arterial High-Standard Highway Network in Japan

◆ Construction & Maintenance Circumstances of Road

Transportation Infrastructures in Japan

◆ EJEC Professional Engineering Activities for

Infrastructures

◆ What Can EJEC Do for You?

Arterial National Highway Network in Old Times of Japan

Page ・ 3Eight-Japan Engineering Consultants Inc. (ＥＪＥＣ)

✓ The basic highway network was completed from the 7th century

to the 8th century.

✓ Width of the road ： 30m (maximum) ～ 6m (minimum)

✓ Total length of the road ： 6,300km

【Mystery of the Road in Old Times ; Toshihide OUMI】

Contemporary Arterial High-standard Highway Network of Japan

Page 4

(Data in 2014)


Total length in plan Total length in service

Arterial high-

standard highway

14,000 km

(approximately)10,685 km (76%)

National

expressway11,520 km 9,253 km (80%)

National highway2,480 km

(approximately)1,432 km (58%)

Page ・ 5

CONTENTS



◆ Construction & Maintenance Circumstances of



Infrastructures


The Bridge Number in Total for last 60 years

Page ・ 6Data from MLIT Report (Dec. 2007)

Bridge length

more than 15m

Cumulate Bridge Number

50,000 100,000 150,000

50,000

100,000

146,000

Cumulate Bridge Number

Yea

r B

ridge

Const

ruct

ed


The number of the bridges according to the year constructed

Page ・ 7

Bridge length more than 2m

■Expressway ■National Road ■Prefectural Road

■City Road■Government Ordinance City Road

Data from MLIT Report (2013)


TokyoOlympic

Peak of Infra-construction

Age Distribution of Bridges in Different Road Administrators (1)

Page 8

■Expressway ■National Road

Age

(Bridge Number) (Bridge Number)

Bridge Average Age : 35 yearsBridge Average Age : 29 years

Average Age

29 years

Average Age

35 years

Data from MLIT Report (2013)Eight-Japan Engineering Consultants Inc. (ＥＪＥＣ)

Page 9

Age Distribution of Bridges in Different Road Administrators (2)

■Prefectural Road and Government OrdinanceCity Road

■City Road

Average Bridge Age : 35 yearsAverage Bridge Age : 38 years

(Bridge Number)(Bridge Number)

Age

Average Age

38 yearsAverage Age

35 years

Data from MLIT Report (2013)Eight-Japan Engineering Consultants Inc. (ＥＪＥＣ)

An Example of Damaged Bridges (1)

Page 10Eight-Japan Engineering Consultants Inc. (ＥＪＥＣ)

Spalling, exposed reinforcement and exposed sheath pipe

of the bottom of PC box girder bridge

Damage

Rapture of PC cable

Myoko-ohashi Bridge(located in Niigata Pref.)

Opened in 1972

Damage recognized in 2006

at 34 years old



Miharashi Bridge located in Yokohama city, Kanagawa Pref.

Corrosion of the steel pile bent bridge piers

Serious damage recognized at 37 years old



Kisogawa-ohashi Bridge (located in Mie Pref.)

Opened in 1963

Damage recognized in 2007

at 44 years old

Damage of truss diagonal members at imbedding part of concrete floor slab

Rapture Repaired

Page ・ 13

CONTENTS






Infrastructures

【Key words】Safe, Cost Effective and Easy Maintenance

for Longer Use of Infrastructures


Page 14

Keno Expressway：Takaosan IC (Tokyo)Courtesy of the Sobu National Highway Office, MLIT

Takaoka Station North Exit Plaza (Toyama)【Hokuriku Shinkansen opened on 14 March 2015】


EJEC Professional Works for Road and Transportation

Connecting people , goods and information for the elimination of regional gaps

and for the effectiveness use of limited national land.

≪ Business Areas ≫✓Roads ✓Road transport plans ✓Bridges and elevated bridges

✓Tunnels ✓Tunnel ventilation system ✓Urban transport facilities

EJEC Professional Work for a Six-span Continuous Complex

Steel-Concrete Arch Bridge

Page 15

Bridge name : The Otagawa-ohashi Bridge

Location : Hiroshima Pref. (South part of Japan)

Total length : 412 m Road Width : 22.5 m

Open : March 2014

Hiroshima


★The Japan Society of Civil Engineers Tanaka Prize (2015)

★The winning design of the international design competitionheld in Hiroshima in 2009

Page 16

EJEC Professional Work for the Japan’s longest toll-free bridge


View from Irabu Island

View from Miyako Island

Okinawa Pref.

Irabu Island

Miyako Island

The Irabu-ohashi Bridge (Opened in Jan. 2015)

The Japan Society of Civil Engineers Tanaka Prize (2015)

Location of

Irabu-ohashi Bridge

Total length of the

bridge is 3.54km.

Challenge to Build the Great-depth Underground Structure

Page 17

Central CircularRoute

Tokyo-GaikanExpressway

Metropolitan Inter-CityExpressway

Greater Tokyo Area

■Unique Shield Tunnel in Japan ( Diameter of the tunnel: 12.5m)

✓The shield tunnel of 8km long was completed without middle vertical shaft.

■Deepest Caisson Construction Method in Japan

✓Depth : 70m for Nakameguro ventilation tower

Nakameguro ventilation tower

Length of Shield Tunnel : 8km


Caisson

Shield tunnel

Ventilation duct

1/100 scale caisson model

Size of the caisson

42m × 32.5ｍ

Preliminary & Outline Design 39

Detailed

Design, 137

Inspection,

maintenance 83

Renewal 19

Supervise 24

Facility

design 98

・Extra-large cross-section tunnel

・Binocular tunnel ・New PLS・Survey, Inspection and

maintenance


Page 18

EJEC Professional Works for Tunnels

EJEC Professional Works400 cases during 1995-2015

Design of a Soft Ground Control Measure for Long Use of

Road under Stable Situation

Page 19

■Design procedures✓Estimation of road embankment deformation

with considering effects of adjacent steel

tower foundations by FEM analysis

✓Design by applying Construction Information

Modeling (CIM)

Vertical section for the location of road embankment to be designed

Thickness of the soft ground : 15m (approximately)

Road embankment


■Applied soft ground control measures✓Vertical drain method (fiber board)

✓Deep mixing method

Deep mixing treatment

Vertical drain treatment

FEM analysis model


EJEC Professional Works for Maintenance and Protection

Bridge inspection using an aerial

vehicle for repair design

Bridge inspection using a

special vehicle for repair design

Tunnel inspection using an aerial

vehicle for repair design

≪ Business Areas in terms of Road Transportation Infrastructures ≫✓Inspection, survey and health check

✓Long service life planning and protection planning

✓Design of protection and repair work

EJEC offers a best suited solution service for the appropriate maintenance to ensure

the continued use of rich and high quality social capitals in the years to come.

EJEC solution approaches reflect (i) the progress of repair materials and repair

methods to deal with the general deterioration and damage caused by many different

factors and (ii) the further refined latest technologies.


EJEC Professional Works for Earthquake Resistance

and Traffic Vibration Issues

Dampers

Bracket for dampers

≪ Business Areas ≫✓Aseismic design of any kind of structures

✓Seismic retrofitting design of any kind of structures

✓Traffic vibration control measure and its countermeasure design

EJEC provides optimal solutions ranging from the observation and analysis ofbehavior and the medium to long-term planning and formulation of action plans to

comprehensive measures in terms of the aseismic reinforcement and longer servicelife of existing structures.

Page ・ 22

CONTENTS






Infrastructures


What Can EJEC Do for You?

✓ “EJEC” has certain confidence to make living environment better

by applying the excellent civil engineering techniques.

✓ “EJEC” is ready to propose right solutions for any kind of

technical objectives what you have been facing to.

✓ ”EJEC” is preparing to use its accumulated professional

experiences in order to make better decisions for any kind of

engineering issues.

✓ “EJEC” is looking forwards to joining various engineering

projects what you will provide, by carrying out the above

engineering services with the professional mind of our engineers.


Thank you for your kind attention

Please contact me if you have any questions!

ATSUSHI MORI

Phone: (+81) 3-5341-5125E-mail: [email protected]

•Eight-Japan Engineering Consultants Inc.•DEPARTMENT of DISASTER MITIGATION and FACILITY MAINTENANCE

Page EndEight-Japan Engineering Consultants Inc. (ＥＪＥＣ)

Vice Head, Ph.D.

Date post:	25-Apr-2020
Category:	Documents
Upload:	others
View:	3 times
Download:	0 times

Civil Engineering Activities of...

Documents