Loading

  1. TOP
  2. Csr Activities
  3. What Hitachi Zosen Can Do For the Earth, for People
  4. Supporting Everyday Living
  5. 3. Breakwater that Rises up Utilizing the Force of Nature

Supporting Everyday Living

3. Breakwater that Rises up Utilizing the Force of Nature

Breakwater that Rises up Utilizing the Force of Nature

Severer damages caused by natural disasters

Recently, damage from tsunami caused by large earthquakes or flooding due to heavy rain has been extremely severe. The Great East Japan Earthquake clearly indicated just how important structures to protect from tsunami are. There is an urgent need for measures to make urban areas more disaster-proof and disaster prevention systems for major earthquakes anticipated in the Tokai, Nankai, and Tonankai areas.

Development of movable breakwaters to protect from tsunami and storm surge

In the long-term "Hitz 2016 Vision" started in April 2011, Hitachi Zosen decided to focus on the establishment of infrastructure to make society safer and more secure and the development of disaster prevention equipment. Based on this vision, Hitachi Zosen is developing systems and products with functions to prevent disasters or lessen their impact.
The movable flap gate-type breakwater designed for installation on the seabed has been in development since 2003. This movable structure forms a continuous breakwater by rotating and rising doors located on the seabed in line utilizing buoyancy. These structures are classified into two categories depending on their purpose; "tsunami/storm surge breakwater for controlling the water level fluctuation behind it" and "seawall for improving the calmness of waters behind it." Their greatest characteristic is that they rise up by efficiently taking advantage of the force of tsunami or storm surge without the need of any other power source or manipulation. Their use can buy time for evacuation and help to protect and save the lives of many people.

Hitachi Zosen, Toyo Construction Co., Ltd. and Penta-Ocean Construction Co., Ltd. have been testing the movable flap gate-type breakwater designed for installation on the seabed in marine areas of the Yaizu fishing port (Yaizu City, Shizuoka Prefecture). For the test, test equipment where the tsunami/storm surge breakwater and seawall are manufactured as one unit is used to check their basic characteristics in marine areas.

Flap gate type seawall designed for installation on land (neo RiSe)

Hitachi Zosen started to develop NOx removal catalysts to remove NOx in the late 1960’s when air pollution became a social problem and first manufactured a NOx removal system in 1973. Currently, approximately 330 Hitachi Zosen’s NOx removal systems are used in approximately 150 plants in Japan, US, China, South Korea, Taiwan, and Middle East countries. The company’s abundant expertise and advanced technology lead to the development of the marine SCR system.

CSR ACTIVITIES