Honshu-Shikoku Bridge Project

Transcription

1 Honshu-Shikoku Bridge Project Construction, Maintenance and Socioeconomic Impact Kunihisa Mori Director of Long span Bridge Engineering Center Honshu-Shikoku Bridge Expressway Co.,Ltd

2 Table of Contents 1. Introduction of the Honshu Shikoku Bridges 2. Technical Features in the Construction Stage 3. Technical Development of Maintenance 4. Socio-Economic Effects 5. Appendix

3 1. Introduction to the Honshu Shikoku Bridges

4 Honshu-Shikoku Bridges Honshu Akashi Kaikyo Br. Kobe-Naruto Route (89 km) Shin-onomichi Br. Kojima-Sakaide Route (Highway 37km,Railway 32km) Ohnaruto Br. Innoshima Br. Ikuchi Br. Onomichi-Imabari Ohmishima Br. Route (59 km) Seto-Ohashi Shikoku Tatara Br. Hakata-Ohshima Br.s Kobe-Naruto Route 89.0km Kojima-Sakaide Route 37.3km Onomiti-Imabari Route 59.4km (Length in Service) (46.6km) Kurushima Kaikyo Br.s

5 Honshu-Shikoku Bridges Expressway Design speed Lanes Nishi-Seto Seto-Chuo Kobe-Awaji- Naruto 80km/h 4, 2 100km/h 4 100km/h 6, 4 Railway - Ordinary & - (Shinkansen) Length(Expressway) 59km 37km 89km Shinkansen can be loaded in the future.

6 Honshu- Shikoku Bridge Project In 1955, First site investigation was begun. In 1967, the Japan Society of Civil Engineers submitted the Final Report. The Honshu-Shikoku Bridge Project was adopted in New National Land Development Program in 1969 Construction started in Three Routes were opened in HSBA was established in 1970 and became a private enterprise HSBE Co., Ltd. in 2005.

7 2. Technical Features in the Construction Stage

8 Technology of Superstructure Design Standard Wind Effect for Bridge High strength Cable Wire Railway Movement Joint System Cable Anti Corrosion System Self Propelling Barge for Girder Erection Cable Stayed Bridge

9 REQUIRED TECHNOLOGY (Super-Structure) International Waterway ( 1500m + extra space ) Strong Wind ( 80 m/s ) Very Long Span ( 1990 m ) Satisfactory Aerodynamic Performance High Strength Wire New Anti-Corrosion Method for Cable

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13 Seto-Ohashi ( highway and railway )

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15 Self-propelling Barge Kurushima Kaikyo Bridge

16 Cable Stayed Bridge Buckling Test for the Girder Cantilever Erection of Cable Stayed Bridge Practical Bridge Shaking Test

17 Buckling tests for 1/50 Model

18 Cantilever erection of the Girder

19 Practical shaking test

20 Technology of Substructure Design Standard Aseismic Design Laying Down Caisson Method Scoring Protection Under water Non-Disintegration Concrete

21 REQUIRED TECHNOLOGY (Sub-Structure) Deep Water ( 60 m at pier site ) Rapid Tidal Current ( 4.0 m/s at pier site ) Geology ( semi-consolidated gravel ) Seismic Design ( M 8.5 ) Huge Scale Sub-Structure ( 70 m 80 m ) Laying-Down Caisson Method Underwater Non-disintegration Concrete Scour Protection Aseismic Design for Major Earthquake

22 SEISMIC DESIGN Input Seismic Excitation Earthquake occurring with recurrent cycle of 150 years Earthquake of M 8.5 with distance of 150km Maximum Acceleration of 800 gal Kobe Earthquake ( ) Distance of within 3km M7.2

23 Standard acceleration spectrum

24 Geological Survey

25 Surveys of the Seabed To Investigate for Characteristics of Supporting Layer Undisturbed Sample Large-diameter Core Sampling Technology 30cm Dia.

26 Sinking Steel Caisson Laying-Down Caisson Method

27 Scour Protection Akashi Kaikyo Bridge Tidal Current 4.0 m/s

28 UNDERWATER NON-DISINTEGRATION CONCRETE REQUIREMENT Non-integration in Water Viscosity Admixture Self-Leveling ( 56 m ) Fluidity Admixture Large-Volume Casting Work Total amount 2P Caisson 259,000 m 3 3P Caisson 232,000 m 3

29 Concrete Plant Barge (25,000t)

30 Akashi Kaikyo Bridge after the earthquake

31 Distribution of Faults around Bridge

32 Deformation of bridge

33 3. Technical Development of Maintenance

34 Characters of H-S Bridges Large scale structures of 17 long span bridges. Long period maintenance more than 200 years. Environmental condition is severe. New material and structures are used. Flexible structure

35 Inspection of Long-Span Bridges Objective Early discovery of damages Appraise the conditions of the structure Category Regular Inspection Patrol Inspection Basic Inspection Precise Inspection Nonscheduled Inspection Extraordinary Inspection Special Inspection

36 Equipment for Maintenance Cable Work Cages Outside Work Gantry Tower Maintenance Gondola Inside Work Gantry

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40 Corrosion Protection System for Conventional Main Cable

41 Dry-air Injection System of the Akashi Kaikyo Bridge Air Injection Pipe Main Cable Tower Air Injection Cover Air Exhaust Cover Air-injection injection Cover Dry-Air Injection System Stiffening Girder A B A: Control panel B: Filter C: Dehumidifier D: Roots blower E: Discharge silencer F: Cooler C D E F

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43 Corrosion Protection System Akashi Kaikyo Bridge Kurushima Kaikyo Bridge

44 Electro-deposit Protection Method for Skin Plate of Steel Caisson Foundation

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46 Principle of Electro-Deposit System

47 Progress of Adhesion Film Formation Before scale removal After scale removal Before charging 15 months after charge

48 Maintenance Procedure for Concrete Structures Inspection Investigation Prediction of deterioration Estimation, Judgement Selection of Measures Implement Measures

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50 Other Engineering Developments Non-destructive inspection of suspender ropes Impregnating paints for prevention of concrete-structure deterioration Painting robot

51 Non-destructive Inspection of Suspender Ropes -Main Flux Method- N- pole [Norm al] Area S Flux [Corroded] Area S-pole S Flux Wire rope Magnetic line of force

52 Apparatus Construction

53 Relationship between decrease in Crosssectional Area and Strength decrease Rate (Ohnaruto Br.) Tensile Strength Reduction Rate (%) Y= X Strand Rope C.F.R.C. Suspender Rope Cross-Sectional Area Reduction Rate (%)

54 Impregnating paints for prevention of concrete-structure deterioration Background Resin-base paints needs to be repainted periodically at intervals of about a dozen years due to deterioration of organic binder material caused by ultraviolet rays. Strategy Impregnating paints which are mostly made from inorganic materials and hardly deteriorate under UV rays, are tested on-site.

55 Development of painting robots Painting robot for box girder Painting robot for tower

56 4. Socio-Economic Effect of the Project

57 Time Reduction East Route ( Kobe-Tokushima) Ferry Highway 270min 100min Central Route ( Kurashiki-Sakaide ) Ferry Highway 120min 40min West Route ( Onomichi-Imabari ) Ferry Highway 160min 80min

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67 14% 9% Rate of Growth Gross Regional Product Central Route open Ohnaruto Bridge open Nationwide Shikoku Akashi Bridge open 4% -1% % -11% West Route open year

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69 5.Appendix

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71 Japan Highway Public Corp. Asset East Nippon Ex Central Nippon Ex Tokyo Metro Expressway Corp. Hanshin Expressway Public Corp. Asset Asset West Nippon Ex Tokyo Metro Exp. Hanshin Exp. Japan Expressway Holding and Debt Repayment Agency Honshu- Shikoku Bridge Authority Asset JB-Honshi

72 Future Strait Crossing Projects Kanmon Crossing Kitan-Kaikyo Crossing Tokyo Bay Crossing Hoyo-Kaikyo Crossing Ise Bay Crossing Amakusa-Shimabara-Nagashima Crossing

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