Shield Tunnel Construction Completed for Joint Gas Pipeline Project across Ise Bay
October 25, 2010
Chubu Electric Power Co.,Inc.
Toho Gas Co., Ltd.
This is to announce that Chubu Electric Power Co., Inc. (President: Akihisa Mizuno; head office: 1, Higashi-shincho, Higashi-ku, Nagoya, Aichi Prefecture) and Toho Gas Co., Ltd. (President: Takashi Saeki; head office: 19-18, Sakurada-cho, Atsuta-ku, Nagoya, Aichi Prefecture), which have been working jointly to install a gas pipeline across Ise Bay (announced December 22, 2006), today completed construction of the pipeline's shield tunnel*1.
The two companies are preparing facilities to ensure that the energy supply infrastructure is stable and stronger than before. As part of this, they are jointly installing a gas pipeline across Ise Bay to connect Chubu Electric Power's Kawagoe Thermal Power Plant, Toho Gas's Yokkaichi Works and the Chita LNG Terminal that they jointly operate.
They are conducting the gas pipeline installations and other tasks in turn with an aim to finish in about FY2013.
With the understanding and cooperation of the local residents and everyone affected by the project, we will continue to proceed with the construction work with a focus on safety.
*1 Definition of shield tunnel:
A shield tunnel refers to a tunnel formed using a shield construction technique.
This is a technique in which a shield machine (a cylindrical steel ground-boring machine) is used to bore through the earth while the ground is prevented from caving in; inside the shield machine, lining plates (known as segments) are continuously assembled to form a tunnel. This safe and practical technique has become widely used in recent years, for tunnels in urban areas for subway systems, water and sewer services, gas, telecommunications and electric power, and for tunneling under the sea floor.
(Diagram of Shield Tunnel Construction for Gas Pipeline across Ise Bay)