1. Forecast 10 years - Underground Space Technology - USHIJIMA Kunio (Civil) NOMURA Mitsugu (Civil)

2. Summary Underground Space Technology improves in the days. The progress of the dramatic tunnel method of construction and the progress of the design technology specially occurred in these twenty years. Underground Space Technology improves in the days. The progress of the dramatic tunnel method of construction and the progress of the design technology specially occurred in these twenty years. Development of technology for twenty years of the main underground space development technology will be described, and that trend will be described about main development of technology for ten years from now on. Development of technology for twenty years of the main underground space development technology will be described, and that trend will be described about main development of technology for ten years from now on.

3. Introduction

4. Tunnel Rock Mass TunnelSoil TunnelDeep Shaft Underground Space Technology Tunnel

5. The Technological Development Trend Of The Rock Mass Tunnel

6. Technological innovation shotcrete + rock bolt NATM Picture. Ousakayama Tunnel （ L=664m ； 1880 ）

7. Technological innovation Picture ． Rib &Woods

8. Technological innovation Picture ． NATM ( in Korea )

9. Technological innovation Picture ． NATM ( in Korea )

10. Technological innovation Figure ‐ 1 ． Change of Suport System(Road Tunnel)

11. Technological innovation Support structure thing material Wood ・・・ 20 years before Wood ・・・ 20 years before （ arch material ） Wood → Steel ・・・ in the 1960s dynamics model ＆ shotcrete, rock bolt Dramatic change

12. Demand trend Table ‐ 1 ． The Length of Japanese Tunnel

13. Demand trend Figure ‐ 2 ． Investment for Underground Space

14. The Technological Development Trend Of The Soil Tunnel

15. Technological innovation a tunnel to set up in Mt ground where it accumulates in the third period or the fourth period and which is not a rock mass yet. How to construct a soil tunnel in Japan TBMTBM ・ TBM (Tunnel Boring Machine ; with Segment Support ) NATMNATM ・ NATM (New Austrian Tunneling Method ) Soil tunnel

16. Technological innovation Picture. TBM ( Metropolitan Expressway central loop line )

17. Demand trend But!! A demand of Soil tunnel ・ Restructuring of the traffic of the city part ・ Drainage and a service pipe way ・ The reserve pipe of the flood countermeasure It is dug with NATM, or it is not only to dig it with TBM, and it is the market being opened only by the enterprise which can plan synthetic execution in such cases as a correspondence to the environment of the ground water, noise, vibration.

18. Rock Mass Deep Shaft

19. Technological innovation It is pointing at Deep Shaft installed by the master of the depth 100m and more in the rock mass here. Deep Shaft Development of technology was proceeding with the coal mine through Deep Shaft in Japan. But!! A coal mine itself with Deep Shaft declined as a result that demand of energy in Japan shifted from the coal to the petroleum, and development of technology of Deep Shaft had the final breath as a result in the 1970's as that result, too.

20. Technological innovation Figure ‐ 3 ．

21. Technological innovation Figure ‐ 4 ．

22. Technological innovation Now Deep Shaft ・ The ventilation Deep Shaft of the road ・ The service Deep Shaft to the underground stock tank of the petroleum and the gas ・ The hydroelectric power station

23. Picture. Deep Shaft (Appearance) Technological innovation

24. Picture ． Deep Shaft (inner)

25. The Age Of Maintenance And Management The Age Of Maintenance And Management

26. Maintenance of the underground space is very important from now on. It is anticipated when the maintenance managerial technique to realize the development of the optimization technique to manage efficient maintenance from now on and that grows to be a trend technological field most.

27. Thanks