国土技術政策総合研究所 研究報告 - nilim.go.jp

1 ISSN1346-7301 47 23 9 RESEARCH REPORT of National Institute for Land and Infrastructure National Institute for Land and Infrastructure ManagementMinistry of Land,Infrastructure,Transport and Tourism, Japan A Consideration about Port Entry ofBulk Carrier with Using Tidal LevelYasuhiro AKAKURA, Motohiro SEMAi 2011 9 YSK-R-41 * ** 30 10 UKC UKC J-Fairway

2 UKC J-Fairway * ** 239-0826 3-1-1 046-844-5027 Fax 046-844-5027 e-mail: ii Research Report of nilim September 2011 YSK-R-41 A Consideration about Port Entry of Bulk Carrier with Using Tidal Level Yasuhiro AKAKURA* Motohiro SEMA** Synopsis Dry bulk cargoes such as coal, iron ore, grain are raw materials for many industries and foodstuffs for our daily lives, and are imported by bulk carriers. The sizes of bulk carriers are getting larger and larger.

3 About 300,000 DWT ore carriers and 100,000 DWT grain carriers go into services. In Japan, international bulk strategic ports have been already selected, and will be developed hereafter. But, because of the Great East Japan Earthquake Disaster, some delay of this development plan is assumed. It is common that large ships use tidal level during port entry/departure. There are many ports that introduce UKC management system in the world. But, in Japan, there is no uniformed guideline for using tidal level during port entry/departure.

4 Many ports use static UKC (Under Keel Clearance), such as 10% of maximum draft for large ship entry/departure. Considering above mentioned conditions, after investigate the information of Japan and World ports, this paper proposes port entry procedure by using J-Fairway program to control under keel clearance. By this procedure, efficient and rational management of port entry will be enabled. Furthermore, this paper considers about the tidal level used in the waterway plan. Key Words: Tidal Level Bulk Carrier Waterway Depth Maximum Draft UKC J-Fairway * Head of Port Planning Division, Port and Harbor Department ** Researcher of Port Planning Division, Port and Harbor Department 3-1-1 Nagase, Yokosuka.

5 239-0826 Japan Phone +81-46-844-5027 Fax +81-46-844-5027 iii 1 1 2 3 3 6 10 3 14 Tidal Window 14 J-Fairway 14 21 4 23 23 PIANC 24 25 26

6 28 5 29 29 30 33 34 6 36 36 37 38 iv - 1 - 1.

7 21 12 5 10 3 Tidal Window UKC 10% UKC

8 J-Fairway 2. 3. 2. Tidal Window J-Fairway 4. 5.

9 4. LNG LPG - 2 - DWT Dead Weight Tonnage LOA Length Over All B Breadth Moulded dfull Full Load draft

10 D Maximum draft UKC Under Keel Clearance Keel UKC UKC Tidal Window Squat 1) - 3) 1 2 12 25 1 1 M. S. L. Mean Sea Level UKC 1 C.